P0755 and P0740 Codes in 2026: Shift Solenoid B, the Converter Clutch Circuit, and the Connector and Software Fixes That Come Before a Valve Body

A code that names a circuit is not a code that names a part.

P0755 and P0740 both mean the transmission computer saw a wrong electrical signal on a solenoid circuit: P0755 on the circuit of shift solenoid B, which helps the transmission pick a gear, and P0740 on the circuit that tells the torque converter's lock-up clutch when to apply. Makers print the names differently. Stellantis prints P0755 as "2C Solenoid Circuit," as "Shift Solenoid B (DG7 Only)" and as "Shift Solenoid 2 Control Circuit - Open"; Toyota prints its P0740 sub-code P07407E as a converter clutch actuator "Stuck On"; Nissan prints "P0740 TORQUE CONVERTER." The companion codes P0750 and P0743 are the same kind of fault on shift solenoid A and on the converter clutch's electrical side. P0755 itself is rare in the record: only Stellantis prints it in a bulletin, and only 9 owner complaints name it, so much of what follows comes from its neighbours P0740, P0744, P0751 and P0756 and from the same solenoids and valve bodies. The code says which wire or valve the computer was watching. It does not say whether the wire, the plug, the solenoid, the valve body it sits in, the fluid, the battery or the computer itself is at fault.

We found 448 manufacturer documents on NHTSA's site in searches for these codes, for shift solenoid and converter clutch solenoid wording, and for transmission solenoids and valve bodies tied to a shift fault: bulletins, software updates, service messages and dealer and owner letters, from Ford, General Motors, Stellantis, Toyota, Nissan, Hyundai, Kia, Subaru, Mazda and others. 153 of them were found by a second, independent search. We read 257 in full and compared the other 191, which are later revisions, twins and copies, line by line against a document read in full; beyond those we read 28 files from ten recall campaigns. How is in the methodology at the end. 167 of the 448 print one of the codes in their own text, and the fixes disagree: a software flash on a Ram diesel, a connector inspected and greased in a Stellantis record that names no vehicle, a solenoid and harness on a June 2017 Dodge Journey, a harness and then a computer on a Hyundai, a valve body but not a new transmission on a Nissan CVT, and a whole transmission with its converter on a 2024 Toyota Tacoma.

The federal complaint file tells the rest. We read all 1,647 complaints from 2015 to 4 October 2026 that mention one of these codes in any spelling, a shift or converter clutch solenoid, a transmission solenoid or a valve body tied to a shift fault. Most owners never write the code. Every complaint was sorted twice, independently, by the same written rules. 1,539 were about a transmission solenoid, valve body or code on the owner's car, and only 103 of them name a code from this family. In 534 a shop replaced, quoted or blamed a valve body, in 257 the transmission and in 225 a solenoid, and 414 name no diagnosis at all.

By the end you will know which of five routes your code is on, what each costs in 2026, what the makers' own documents print for your vehicle, and which cheap checks come before a solenoid, a valve body or a transmission.

Claims marked 🟢 rest on a document listed in the Sources section, read in full. Claims marked ⚪ are shop-price estimates carried from our repair guides. Owner-reported figures are what people told NHTSA, published with ODI numbers, and every complaint count here comes from the 1,647 complaints sorted twice and published.

I built PulsCar after a $380 "full diagnostic" in Phuket in 2025 led to roughly $6,000 over six months across several shops (the story is on the About page). A solenoid circuit code is that pattern with a transmission attached: a code that describes a signal, a part that is easy to quote, and a plug or a software step that the maker wrote down first. Every claim below that rests on a document names it.

What P0755 and P0740 say: the signal on the circuit was wrong

What a shift solenoid does. Inside the transmission, the computer switches small electric valves, solenoids, to send fluid pressure to the clutches that make a gear. 🟢 Ford's 6F35 bulletin SSM 46355 is the one document we read that blames a mechanically binding shift solenoid B: harsh reverse and harsh or delayed 3rd and 5th gear shifts with no code, "This may be due to a mechanically binding shift solenoid B (SSB)."

What the code measures. An electrical signal. 🟢 Hyundai's checks for its solenoid codes start with a scan tool and wiring: "Visually check the wiring harness between the TCM and transmission for a damaged wire or connector." A circuit code such as P0740, P0743, P0750, P0753, P0755 or P0758 can be set by the solenoid coil, by the harness, by the plug, by low voltage, or by a computer that misreads a healthy circuit. The performance and stuck codes next to them, P0741, P0751, P0752, P0756 and P0757, say the computer commanded a shift or a lock-up and the gear or clutch did not respond as expected; in the Ford and GM papers we read they point to a valve, a clutch cylinder or the fluid more often than to a wire.

What it does not know. Which of those it was. 🟢 Stellantis's case record for P0765, P0871 and P0755 says solenoid packs replaced for those codes were found without a fault: "An analysis of several solenoid packs replaced for these DTCs have shown to be Trouble Not Found (TNF)." 🟢 Ford says of a battery cause on its 6R140: "Replacement of transmission components will not resolve this condition." Same family of codes, different answers.

What the driver feels. Anything from nothing to no drive. 🟢 Stellantis's 2016-2017 ProMaster solenoid pack campaign describes a transmission that "may cause the transmission to be limited to one gear and maximum speed of 30 - 45 mph." Many owners in the file describe harsh shifts, a delay when they press the pedal, or a drop into neutral.

First: what does the car do, and which code is it?

This decides which documents apply. Write down every code and exactly when the car misbehaves.

Why the difference matters. A code with normal shifting leaves time for the cheap checks. A transmission that loses drive does not. 🟢 Ford says its own 6R140 (a heavy-duty six-speed automatic) condition is limited gears: "may be limited to 5th gear and reverse gear only" is the description, the fix is a charged battery and a restart, and the codes P2701, P2704, P0757 and P0733 are the ones it lists.

The P0755 and P0740 family, and what the documents actually print

How the counts work. 167 of the 448 files print a code; 78 of the 257 documents read in full do, and the per-code counts above include revisions and copies.

Search traps. A search for "P0755" misses documents that print "P0755-00" or "P075500," and a search for "P0740" misses Toyota's "P07407E" and "P07407F." 🟢 Stellantis calls P0755 "2C Solenoid Circuit" in one bulletin and "Shift Solenoid 2 Control Circuit - Open" in another. Ford's lists name P0751, P0752, P0756 and P0757 but never P0755. And a document that prints one of the codes is not always about it: 78 of the 257 documents we read in full print one of these codes, mostly inside a list.

The maker atlas: who wrote about these codes, and what they blamed

Stellantis (Ram, Dodge, Chrysler, Jeep): a connector, software, then a solenoid pack. 🟢 The case record S2121000008 REV. C of June 2022, which names no vehicle, says solenoid packs replaced for P0765, P0871 and P0755 "have shown to be Trouble Not Found (TNF)" and that the true cause "may be due to a loose or dirty electrical connection. Especially at the main transmission electrical connector (D29A)"; inspect it, apply dielectric grease, clear the codes and drive 15 minutes in the city and 15 on the highway "before replacing any parts." 🟢 Tech tip 9004380 of May 2021 for model year 2020-2021 D2 and DJ trucks (Ram 3500 and 2500 pickups) asks that before swapping the solenoid module on a repeatable P0755 or P0765 the technician download event data and send it to engineering. 🟢 Diesel truck updates 18-093-22 (2021 Ram 2500 and 3500 with the 6.7L Cummins) and 18-005-23 (2022) list P0755 among the codes fixed by a PCM flash, and the second prints "CAUSE: PCM Software"; its rapid service update covered only trucks built 29 October to 5 December 2022. 🟢 18-072-23 lists P0750 and P0755 as possible results of an internal engine computer fault on 2023 Ram diesels built 5 December 2022 to 26 April 2023: "CAUSE: Internal Engine Control Module (ECM) issue." The one P0755 document that prints a replacement solenoid is 🟢 tech tip 9003769 for 2017 Journeys built in June 2017, which asks for the parts back for analysis: "If you have a DTC of P0755 we are in need of solenoid and harnesses for analysis," and "replacing the solenoid (PN# 5140429AA) and the transmission harness (PN# 68080261AF) without disconnecting the two components at the solenoid connection." 🟢 For P0740, tip 9004009 on 62TE vans says to check the converter clutch solenoid and, if it is fine, replace the converter.

Ford: the plug, the battery, the leadframe, then the valve body. 🟢 SSM 46719 for some 2017 Explorer, Taurus and Police cars built 14 to 21 June 2017 with P0740 or P0743: "Prior to replacing any components, check pin 14 in connecter c168." 🟢 SSM 54899 puts P0757 and three other codes on a low or jump-started battery in a 6R140 and says "Replacement of transmission components will not resolve this condition." 🟢 A 2015 bulletin on the 6R80 traces a solenoid code to contamination at the solenoid-to-leadframe connection and says "Leadframe or solenoid should only be replaced if the DTC and condition returns." For the big 10R80 family, Ford's bulletins list P0751, P0752, P0756 and P0757 among 29 codes and blame a clutch cylinder sleeve, software, a sticking valve or a one-way clutch, not a solenoid: 🟢 25-2132 says "This may be due to axial movement of the CDF clutch cylinder sleeve causing hydraulic circuit leaks," and 25-2423 blames "a damaged SOWC," the one-way clutch.

General Motors: debris, a sticking valve and a worn control valve. 🟢 PI1344A (2014) says a P0751 launch slip "may be caused by the Clutch Select Solenoid Valve 2 (359), located in the lower valve body, sticking in its bore," and replaces the lower valve body only if the valve is stuck or scratched. 🟢 PIE0371A covers delayed shifts with P0751, P0752, P0756, P0757, P0761 or P0762 on 2016-2017 Silverado and Sierra with the Allison A1000: "GM Engineering is attempting to determine the root cause of the above condition," and technicians are told to watch for stuck valves caused by small debris. The recent GM story is the transmission control valve: special coverage N242454441 for "the transmission control valve has worn," P0747 and harsh shifting, which our P0700 guide explains in full.

Toyota and Lexus: a reflash, with two big exceptions. 🟢 T-SB-0018-18 fixes P07407E, a stuck-on converter clutch actuator, on 2018 four-cylinder Camrys with software: "The ECM (PCM) should NOT be replaced as part of the Repair Procedure." 🟢 T-SB-0160-18 is the exception: for 2017-2018 Highlanders and Siennas whose transaxle serial number and input-speed test fall inside the bulletin's limits, and that show a listed code, a whine or a harsh shift, it says "4. Replace the transaxle." 🟢 T-SB-0094-24 for the 2024 Tacoma lists P07407F, "Torque Converter Clutch Actuator Stuck Off," with several pressure control solenoid codes and replaces the transmission and the converter.

Nissan and Infiniti: the valve body on a Nissan CVT, a reprogram on an Infiniti. 🟢 NTB15-037b for 2012-2016 Versa sedans, 2014-2016 Versa Notes and 2013-2016 Sentras, when the manual's tests say the CVT would otherwise be replaced, puts "P0740 TORQUE CONVERTER" and "P0743 TORQUE CONVERTER" in a table of codes that call for a new control valve and states "NOTE: Do not replace CVT." 🟢 Infiniti ITB23-022 reprograms the transmission computer on 2017-2020 Q50 and Q60 cars when P0744 is stored and the computer's part number is on the bulletin's list.

Hyundai, Kia and Genesis: the solenoid, the harness, then the computer. 🟢 18-AT-016 for the 2018 Sonata 2.0T and 2019 Santa Fe says "Do not replace the transmission for any of the solenoid DTC listed below," replaces the related solenoid and the valve body harness, then the control wiring harness, and last "If the solenoid DTC returns again, replace the PCM"; for P0741, the converter clutch performance code, the last step is to replace the transmission. Kia's TRA 051 and Genesis's 16-AT-011 run the same ladder.

The 10-minute check

1. Read every code and the freeze frame, the conditions saved with it (2 minutes). No scanner? Many auto-parts stores read codes free; ask them to print the freeze frame too. P0755 or P0740 alone, or with P0700, a pressure control code, a gear-ratio code or a clutch code? Write them all down before anyone clears them.

2. Name the symptom (2 minutes). Normal shifting with a light, harsh or late shifts, a gear that sticks, or no drive.

3. Ask what the battery has been through (2 minutes). A jump start, a dead battery, a new battery, a low-voltage warning. 🟢 Toyota's tech tip on a 2016 Scion iA says a dead or jump-started battery can leave the car unable to move in reverse because the battery cannot power the transmission solenoid.

4. Check fluid level and color if your transmission has a dipstick (2 minutes). Follow the owner's manual: many automatics are checked hot, in Park on level ground with the engine running and the parking brake on, with hands and sleeves clear of the fan and belts; many newer cars have no dipstick, and then skip this step. Ask when the fluid was last changed.

5. Run the VIN (2 minutes). nhtsa.gov/recalls lists safety recalls by VIN. Software updates, special coverage and bulletins are filed on NHTSA's site under manufacturer communications for your year, make and model, and a dealer can look them up: ask by number, using the lists in this guide.

Six situations, and which is yours

"P0755 or P0765 on a 2021-2023 Ram 2500 or 3500 diesel pickup, or P0755, P0765 or P0871 on any Stellantis vehicle." The maker's first steps are the connector (the record names no vehicle), event data and software. On a 2023 Ram diesel built 5 December 2022 to 26 April 2023 with P0750 or P0755, ask about bulletin 18-072-23, an internal engine computer fault, before any transmission part. → Routes 1 and 2.

"P0740 or P2764 with jerking or slipping on a 62TE van or minivan." Stellantis checks the converter clutch solenoid, then the converter. → Routes 4 and 5.

"P0740 or P0743 on a 2017 Explorer, Taurus or Police car built 14 to 21 June 2017." Check connector C168, pin 14. → Route 1.

"P0743, P0753 or P0758 on a 2018 Sonata 2.0T, a 2019 Santa Fe, a Kia six-speed or a Genesis." The solenoid, the harness, then the computer, never the whole transmission first. → Routes 3 and 4.

"P0740 or P0743 on a Versa, Note or Sentra CVT with no codes outside the bulletin's list, or P0744 on a 2017-2020 Q50 or Q60." A software update or the control valve. → Routes 2 and 5.

"A GM or Ford with harsh shifts or a reduced-power message and P0747, P0751 or P0756." Valve body territory. → Route 5, and the VIN check.

"Any other car with P0755 or P0740 and normal shifting." Check the Toyota and Ram bulletins above first; if none fits, follow the 10-minute check, then Route 1, a scan-tool solenoid test, then the solenoid. → Routes 1 to 4.

The price ladder, from the bottom up

Try the top lines before paying for the bottom ones. The ⚪ figures come from our transmission repair cost guide; the owner figures are listed with ODI numbers in the published file. The gap between the ⚪ valve body line and the owner line is real: most owner valve body figures are quotes, but even the 16 paid or billed ones have a median of $1,950, and the GM truck and SUV figures cluster in 2025 and 2026.

The five routes, cheapest first

Route 1 · The plug, the battery and the fluid — $0 to $400

What it is. The circuit is fine and something feeding it is not: a loose or dirty electrical connector, a battery that dropped low or was jump-started, fluid that is overfilled, contaminated or overdue. The code is the computer noticing, not the part failing.

What the documents say.

🟢 Stellantis S2121000008 REV. C, a case record that names no vehicle: "please perform the following before replacing any parts." Then: disconnect and inspect the transmission and engine computer connectors for "corrosion" and loose or pushed-out terminals, apply "a thin layer of dielectric grease to the transmission connector," clear the codes and drive 15 minutes in the city and 15 minutes at a steady highway speed. The record says solenoid packs replaced for P0765, P0871 and P0755 were found to have no fault.

🟢 Ford SSM 46719, some 2017 Explorer, Taurus and Police cars built 14 to 21 June 2017 with P0740 or P0743: "Prior to replacing any components, check pin 14 in connecter c168 for correct fitment, tension, push out, or any signs of damage." If that terminal is fine, "follow normal diagnostic routines for the fault codes."

🟢 Ford SSM 54899, 2023-2026 F-53 and F-59 chassis and 2024-2026 F-650, F-750 and E-Series with the 7.3L and the 6R140: the transmission may be limited to fifth gear and reverse, codes P2701, P2704, P0757 and P0733 may be stored, "This may be due to PCM software being unable to command the transmission solenoid clutch actuators when the battery has a low state of charge (SOC) and/or the vehicle has been jump started." The fix is a charged battery and a five-minute wait, and "Replacement of transmission components will not resolve this condition."

🟢 Subaru 16-80-11R, low-mileage (6,000 miles or less) 2010-2013 Legacy, Outback and Tribeca five-speeds with a flashing oil temperature lamp and P0751 or P0756: "Instead of replacing the valve body, flush the transmission and perform the Dynamic Check Mode procedure"; only if the symptom remains is the valve body replaced.

What the owners report. Few. Only 12 of 1,539 relevant complaints end with a fluid fix and 22 with a shop that checked and found nothing. A 2006 Jeep Grand Cherokee owner says the dealer "DIAGNOSED THERE WAS TO MUCH TRANSMISSION FLUID IN VEHICLE" and that the third and fourth solenoid slipped.

The cheap cause that gets skipped. The battery and the plug. Nobody quotes a connector clean-and-grease job, and a jump start almost never appears in an owner's account. A low fluid level from a leak is a separate job, covered in our transmission fluid leak guide. Ask whether the battery was low or replaced when the code appeared.

Fix it yourself. Safe and useful: write down the codes before anything is cleared, note whether the battery was jumped, and on a car with a dipstick check the fluid level and color on a white towel. A visual look at an accessible connector for corrosion is fair on a driveway; unplugging a transmission connector can mean dropping a pan, so stop there.

At the shop — say this. "Before a solenoid pack, please inspect the transmission connector and the computer connector for corrosion and loose pins, check the battery and charging voltage, and tell me which bulletin you are following for my VIN."

Route 2 · Software and relearn — $0 under warranty, about $200 to $500 otherwise

What it is. The hardware is fine and the computer's logic sets the code or applies the clutch badly. The fix is a reprogram, often followed by an adaptive learning drive. ⚪ Our repair guide puts programming on modern eight- to ten-speed transmissions at $200 to $500.

What the documents say.

🟢 Stellantis 18-005-23, 2022 Ram 2500 and 3500 diesel pickups (the rapid service update covered only trucks built 29 October to 5 December 2022): P0755-00, "Shift Solenoid “B” (DG7 Trans Sales Code)," is among the codes fixed by a PCM flash, and the printed cause is "CAUSE: PCM Software." The rapid service update "will expire 18 months after the date of issue" of 12 January 2023. The earlier 18-093-22 does the same for 2021 pickups.

🟢 Toyota T-SB-0018-18, 2018 four-cylinder Camry, P07407E: the computer logic was changed; "The ECM (PCM) should NOT be replaced as part of the Repair Procedure," and the repair is covered for 96 months or 80,000 miles from the in-service date. Lexus L-SB-0005-19 does the same for P07457F on 2019 RX 350s.

🟢 Infiniti ITB23-022, 2017-2020 Q50 and Q60: "DTC P0744 (TORQUE CONVERTER) is stored as PAST or CURRENT in the TCM," and the fix is "to reprogram the TCM." 🟢 Ford's 10R80 bulletins split on the codes, and most of them check for newer software first: with none of the listed codes stored, they "reprogram" the transmission strategy and run an adaptive learning drive first and overhaul the valve body only if the condition remains (some newer trucks add a break-in routine before the overhaul); with a listed code stored, the next step depends on the vehicle: some go straight to a valve body overhaul (Route 5), others first run a clutch break-in routine three times and an adaptive learning drive.

What the owners report. 21 complaints end with software or a replaced computer. Five are Toyota RAV4s of 2002 to 2004; one owner cites a Toyota bulletin saying the engine computer causes the transmission problem. Two RAV4 owners name P0755 and one names P0750.

The cheap cause that gets skipped. The update itself. A shop that has not looked up the bulletin for your VIN will price the part.

Fix it yourself. No. Flashing a transmission computer needs the maker's tool and a stable battery supply.

At the shop — say this. "Is there a software update or bulletin for these codes on my VIN? Please read the calibration ID before you order a part, and tell me what the update does."

Route 3 · The wiring, harness, lead frame or connector — about $500 to $2,500

What it is. The solenoid is fine and the wire to it is not: a harness that chafes, a connector with water in it, a lead frame that carries the signals from the plug to the valve body, or a terminal that has worked loose.

What the documents say.

🟢 Ford 6R80 bulletin 10058228, March 2015: a solenoid code "may be caused by contamination at the solenoid to leadframe connection," "In many cases cleaning has been an effective way of alleviating the condition," and "Leadframe or solenoid should only be replaced if the DTC and condition returns."

🟢 Subaru 16-149-25, 2020-2023 Legacy, Outback and Crosstrek and 2022-2023 Forester Wilderness CVTs: "Condensation may accumulate within the transmission cover causing moisture to seep into the harness connector for the CVT control valve," which sets P0974, shift solenoid A control circuit high, P0977, shift solenoid B control circuit high, P2721 and P2763. The repair follows a test flow and can include a new control valve, the transmission harness, the computer and a connector cover, depending on what the tests find.

🟢 Jeep 08-141-23, 2023 Compass built 12 January to 10 April 2023 with the 2.0L turbo and eight-speed: P0983, shift solenoid 4 control circuit high, and limp-home mode; the cause is "Transmission harness possible damaged and/or wiring severed at the Powertrain Control Module (PCM)," fixed with foil tape and, if a wire is damaged, a wire repair.

🟢 Hyundai 18-AT-016: if a solenoid code returns after the solenoid, "replace the control wiring harness" between the computer and the transmission. 🟢 Stellantis V46, 2016-2017 ProMaster 62TE: solenoid coil terminals "were built out of specifications" and gave "an intermittent electrical connection," with the transmission limited to one gear at 30 to 45 mph and P076A set. FCA's customer satisfaction campaign replaces the solenoid pack "free of charge (parts and labor)"; the maker says about 33,000 vans were built with the faulty terminals and that many have already been repaired.

🟢 Ford recalls 24V444 for the 2014 F-150 and 19V075 for 2011-2013 F-150s, and the earlier 16V248: "an intermittent failure of the output speed sensor (OSS) in the transmission may result in an unintended downshift to first gear." This is the lead frame that owners write about, and it is a speed sensor fault, not a shift solenoid code: software prevents the downshift, and the molded lead frame is replaced only when "P0720, P0722, P0731 and/or P1500" are stored; otherwise "24S37 does not apply and a refund will not be approved; follow standard workshop manual (WSM) diagnostics." 🟢 FCA recall 16V529, 2014-2016 Jeep, Chrysler, Ram ProMaster City and Fiat models with the nine-speed: a harness "may have been built with insufficient wire terminal crimps," the transaxle "defaults the transaxle to neutral" and FCA says the loss of motive power "could cause a crash without warning," and the harness is replaced only when a listed code is stored, because "do not order a transaxle range sensor wire harness until you verify the specified DTC's."

What the owners report. 27 complaints end with wiring, a harness, a lead frame or a connector. A Hyundai Sonata owner gives the codes "P0753, P2709 AND P0758" and says the cause was the "TRANSMISSION WIRE HARNESS SHORTENING OUT." A Ram 5500 owner writes "REPAIR UNDER WARRANTY WAS TRANS SOLENOIDS. NOW, OUT OF WARRANTY, IT'S THE TRANS WIRING HARNESS." A 2014 Honda Civic dealer found the transmission solenoid had come "UNPLUGGED" and was leaking fluid. An F-150 owner paid $1,600 for a lead frame, a spacer and a solenoid valve plate.

The cheap cause that gets skipped. The harness and plug behind a solenoid that looks guilty. If a solenoid code returns after a solenoid pack, the wiring is the next place the documents send you.

Fix it yourself. Not honestly: the connectors sit inside the transmission or on a pan-drop job, and a wrong repair can short a computer. Look at the visible plug, nothing more.

At the shop — say this. "If the code comes back after the solenoid, please test the harness and the connector for resistance and a short before replacing the next part, and show me the damage."

Route 4 · The solenoid or the solenoid pack — about $300 to $900

What it is. The coil, the valve or the terminals of the solenoid are at fault. This is a route many owners are quoted early, and the documents say it is real for some codes, but several of them also found solenoid packs with nothing wrong.

What the documents say.

🟢 Stellantis tech tip 9003769, 1 November 2017, 2017 Journey built in June 2017, P0755: the maker asks dealers to send the solenoid and harness in for analysis and to replace both "without disconnecting the two components at the solenoid connection." The earlier version of 18 October 2017 asks the technician to call a named contact first and says "If no response in 15 minutes, proceed with repair by replacing the solenoid and the harness."

🟢 Ford SSM 46355, 2014-2016 6F35 transmissions built 1 January 2014 through 31 December 2015: harsh reverse and 3rd and 5th shifts with no code, "This may be due to a mechanically binding shift solenoid B (SSB)," so clean the valve body, replace shift solenoid B and clear the adaptive tables.

🟢 Kia TRA 051: "Replace the solenoids if current or history codes are present; Do not replace the transaxle," and Hyundai's 18-AT-016 says not to replace the transmission for the solenoid codes it lists. 🟢 GM PI1344C: a P0751 launch slip "may be caused by the Clutch Select Solenoid Valve 2 (359), located in the lower valve body, sticking in its bore," and if the valve is stuck or scratched the lower valve body is replaced.

What the owners report. 225 complaints end with a solenoid or solenoid pack, the median mileage is 96,000 and 50 of them say the problem came back. A Dodge Journey owner who did the job writes "cleared codes drove Approx.100 miles light returned on solid." A Ram 3500 owner: the dealer replaced the solenoid and did an update in July 2022, and the same code returned by 30 August 2022. A 2019 Ram 3500 went into limp mode at 4,300 miles, the dealer replaced the solenoid, and the owner says the failure persisted.

The cheap cause that gets skipped. A part that was never at fault. Stellantis's own analysis found solenoid packs replaced for P0755 and its neighbors with no fault. Ask for the test result that condemns the solenoid before you pay for it.

Fix it yourself. No. On most transmissions the solenoid sits under the valve body behind a pan drop and needs a relearn afterward.

At the shop — say this. "Which test failed on the solenoid: resistance, a pressure test or a scan-tool command? Please give me the old part, and tell me what you checked in the plug and harness before you ordered it."

Route 5 · The valve body, the converter or the whole transmission — about $500 to $13,000

What it is. The hydraulic side: valves that stick, a worn control valve that loses pressure, a converter that has failed, clutches burnt from running low on pressure. Here the code is a messenger and the cost is high.

What the documents say.

🟢 Nissan NTB15-037b: a table of codes, among them "P0740 TORQUE CONVERTER" and "P0743 TORQUE CONVERTER," calls for a new control valve, with "NOTE: Do not replace CVT." 🟢 Mazda 05-003/14: "To correct the problem, a new programmed valve body has been established."

🟢 GM N242454441, 2020-2022 Silverado and Sierra, 2021-2022 Escalade, Suburban, Tahoe and Yukon: "the transmission control valve has worn, resulting in a gradual loss of pressure within the valve," with harsh shifting, a service message or code P0747, repaired by a new control valve body under special coverage for "15 years or 150,000 miles." 🟢 Ford recall 25V164, 269 vehicles among the 2024-2025 F-150 and Bronco, 2024 Ranger and 2025 Mustang, Explorer and Aviator: a valve body machined incorrectly, which can cause reverse gear failure or unexpected forward movement in reverse or neutral; the recall replaces it free of charge. 🟢 Toyota T-SB-0160-18: for some 2017-2018 Highlanders and Siennas, after a serial-number and input-speed test, "4. Replace the transaxle."

What the owners report. 534 complaints end with a valve body, 14 with a converter and 257 with a transmission. The valve body count jumps: 17 in 2020, 26 in 2023, 50 in 2024, 192 in 2025 and 122 by 4 October 2026, mostly GM trucks and SUVs. Owners write of a part on national backorder and a truck at the dealer for a month. One 2022 Yukon owner: "They have no valve bodies available, on a national backorder." A Mazda CX-30 owner had a valve body replaced for P0756, then a whole transmission, and spent 35 days at the dealer.

The cheap cause that gets skipped. Everything above. A transmission quoted on a first visit, before the connector, the software and the bulletin, is the case the documents warn against. Hyundai and Nissan print it as an instruction.

Fix it yourself. No.

At the shop — say this. "What did you find in the fluid and the pan, which bulletin or special coverage applies to my VIN, and what does the repair order say the transmission failed on? Please write the codes and the pressure or leak test results on the estimate."

The coverage file: which programs are still running in October 2026

Coverage status below is our computation from the printed terms, not a statement by any maker. No document prints your car's in-service date, so each row says what the terms mean on their face.

Three details that decide claims. First, GM's coverage is by VIN and by the code: 🟢 each of GM's three special coverages checks for P0747 and, if it is not set, N242454441 says "no further action required." Second, the safety recalls fix software, not the part, and they exist because 🟢 "In rare cases, the rear wheels may experience a momentary lock up": GM's recalls 24V797 (diesel trucks and SUVs) and 25V148 (Cadillac and Camaro cars with the 10-speed) install software that limits the transmission to fifth gear once valve wear is detected, and the valve body itself is replaced under the special coverage. If your covered vehicle has not had the recall software, ask a dealer about it before you drive it much. Third, 🟢 GM asked for reimbursement requests under N242454441 by 31 December 2025, "unless state law specifies a longer reimbursement period," and under N242480631 by 31 March 2026. Those dates have passed; if you paid for a valve body on one of these vehicles, ask the dealer or GM anyway.

No safety recall we found names P0755, P0740, P0750 or P0743. Stellantis's solenoid-pack campaign names P076A, and Lexus's recall names a solenoid failure.

What 1,647 complaints about these codes and solenoids show

We read every complaint in NHTSA's file from 2015 to 4 October 2026 that our searches matched: the codes P0740, P0743, P0744 and P0750 to P0759 in any spelling; a shift solenoid, a converter clutch solenoid or a transmission solenoid in words; and a valve body named together with a shift fault — 1,647 complaints, 991 of them found by a second, independent search for what the first had missed. Every complaint was sorted twice, independently, by the same written rules. The two sortings matched on 92% of them, and on whether the car stalled or lost drive for 96%. Every disagreement was settled by a written rule, and the published file carries both sortings.

The codes are the small part. Only 103 of the 1,539 relevant complaints name one of the codes. P0744 appears in 32, P0740 in 24, P0751 in 11, P0752 in 10, P0755 in 9, P0750 and P0756 in 7 each; none names P0743. Of the 24 that name P0740, 10 end with a transmission and 3 with a converter; of the 9 that name P0755, 5 have no diagnosis and 2 end with software, both Toyota RAV4s.

The file belongs to GM and Ford trucks. Chevrolet accounts for 317 of the relevant complaints, Ford 289, GMC 160, Nissan 146, Jeep 86 and Toyota 67. By model: the Silverado 1500 with 124, the F-150 with 114, the Sierra 1500 with 65, the Rogue with 43, the Cherokee with 37.

The symptom is drive, not light. 1,291 describe an abnormal shift or drive symptom, and 267 a stall, a shut-off or a loss of drive. 281 say the problem came back after a repair. 14 report a crash, 6 an injury (8 people), 1 a fire and none a death; the NHTSA fields mark 60 as towed.

More complaints are arriving. By year received: 97 in 2015, 124 in 2024, 329 in 2025 and 281 to 4 October 2026. The median model year is 2016 and the median mileage 89,498. Nothing here is a failure rate: some owners filed more than once.

What do 1,647 federal complaints about shift solenoid codes, converter clutch codes and transmission solenoids show, and why do valve bodies lead? In PulsCar's reading of every complaint that names P0740, P0743, P0744 or P0750 to P0759, a shift or converter clutch solenoid, a transmission solenoid or a valve body tied to a shift fault, each complaint was sorted twice, independently, by the same written rules, and the two sortings matched on 92% of them. Of the 1,539 relevant, 534 end with a valve body, 257 with a transmission and 225 with a solenoid, while only 103 name a code. 314 of the valve body complaints came in 2025 and 2026, mostly on GM trucks and SUVs. 281 say the problem came back after a repair, and 267 describe a stall or a loss of drive.

The valve body wave of 2025 and 2026

The valve body is no longer a rare answer. In every year from 2015 to 2022 the file carries between 9 and 25 valve body complaints; 2023 brings 26, 2024 brings 50, 2025 brings 192 and 2026 to 4 October brings 122. 293 of the 534 are Chevrolet, GMC or Cadillac. 82 mention a backorder and 18 a national one. Across the whole file, 18 complaints mention special coverage and 36 name a GM valve-wear recall or special coverage by number.

What the complaints do not show. Most valve body narratives carry no code at all, and the GM documents tie the worn valve to P0747, a pressure control solenoid code outside this family. The GM programs are explained in our P0700 guide, and the neighboring code P0741 in our P0741 guide.

Wiring is undercounted here. 27 complaints in this file end with wiring; another 668 transmission wiring-harness and lead-frame complaints that name no solenoid and no code were set aside, so the wiring count is a floor, not a total.

What to do. If your car is on the coverage list above, the safe answer is the dealer, the VIN and the special coverage number. If it is not, a valve body quote still belongs after Route 1 and Route 2, not before.

What owners say they paid

We collected every dollar figure for a diagnosis, fluid, a solenoid, a valve body, wiring, a converter, a computer or a transmission tied to this fault in the 1,539 relevant complaints: 298 figures in 226 complaints, 178 of them quotes and 43 described as paid, leaving out mileage, towing, rentals, vehicle prices, payments, other systems and restated figures. The full list with ODI numbers and the inclusion rule are published; the 299 excluded candidates and why are in the method file. By purpose:

Only the paid and billed figures give a floor: among the 16 paid or billed valve body figures the median is $1,950, among the 16 for a transmission $5,050 and among the 16 for a solenoid $810. Quotes are higher because they are what a shop says it will charge, and many owners write because the number shocked them.

How much does it cost to fix a P0755 or P0740 in 2026, and when is a transmission the wrong first quote? Our repair guide carries a fluid service at $150 to $400, a shift solenoid at $300 to $900, a valve body at $500 to $1,200 and a rebuild at $1,800 to $4,500. In PulsCar's reading of the 1,647 federal complaints, owners report a median of $860 for a solenoid, $2,250 for a valve body and $6,000 for a transmission, mostly quotes for valve bodies and transmissions. A transmission is the wrong first quote when a bulletin printed software, a connector check or a harness first, as Stellantis, Ford, Hyundai, Kia and Toyota do, when special coverage for a valve body applies to the VIN, and when nobody has shown you the pressure or leak test, the codes or the damaged fluid that justify it.

Why a P0755 or P0740 comes back after a repair

The repair fixed a part the fault was not in. 🟢 Stellantis found solenoid packs replaced for P0765, P0871 and P0755 with no fault, and says the cause may be a loose or dirty connector. 50 of the 225 solenoid complaints say the problem came back.

The fix addresses one of two causes. For the 2020-2021 Transit, Ford's 10R80 bulletins moved from replacing the valve body to a break-in routine and an overhaul, and Ford's 2026 bulletin 26-2226 lists PCM software again beside the clutch cylinder sleeve. 9 complaints describe a third valve body or more.

The repair was incomplete. 🟢 GM's special coverage N242454441 says "It is critical that the Valve, Spring, and a Plate are replaced during this repair," so a shop that replaces only the valve may see the problem return. 90 of the 534 valve body complaints say the problem came back.

The cause was upstream. A low battery or a loose plug can look like a solenoid fault until the battery is charged or the connector is cleaned; a worn control valve or a computer fault can look the same. 79 of the 257 transmission complaints say the problem came back.

Can you drive with P0755 or P0740?

No document we read gives a limit, and the documents are mostly silent. 🟢 Ford says outright of its valve body recall: "Ford has not issued instructions to stop driving your vehicle under this safety recall." 🟢 Ram says of its 2023 valve body and control unit defect that loss of transmission control "can cause a vehicle crash without prior warning." 🟢 GM's valve program limits the transmission to fifth gear once wear is detected and shows "A service engine light and reduced propulsion message." So the rule below is ours.

Drive gently to a shop, within days: the transmission shifts normally and only a light is on. Avoid pulling a trailer and hard acceleration; if it starts to slip (the engine revs but the car does not pick up speed), stop driving it and have it towed; our transmission slipping guide explains why.

If it drops into neutral while moving: hazards on, keep steering, coast to the shoulder, brake normally, shift to Park only once stopped, then call for a tow.

Pull over and tow: the transmission is stuck in one gear and will not shift out, drops into neutral at speed, or will not move; the dash tells you to shift to park and restart; the rear wheels lock or the vehicle slows with the engine racing; the engine shuts off; or the fluid is black, burnt or full of metal.

Can you drive with a P0755 or P0740, and how long is it safe? In PulsCar's reading of 1,539 federal complaints, 267 describe a stall, a shut-off or a loss of drive, 1,291 an abnormal shift or drive symptom and 60 a tow in the NHTSA field. None of the maker documents in the 448 we read, nor the recall filings, tells owners how far or how long they can keep driving. If the car shifts normally, drive it gently to a shop within days and do not pull a trailer. If it is stuck in a gear, drops into neutral, shuts off, slips with the engine racing, shows a shift-to-park message or metal in the fluid, locks the rear wheels or will not move, pull over and have it towed: a loss of drive in traffic is a bigger risk than a tow bill, and Ram says a crash can occur without prior warning.

Should you buy a used car with a P0755 or P0740 history?

Ask for the repair order, not the story. A cleared P0755 with no record means nothing. Ask which bulletin was followed, whether the connector was inspected, the software updated, and the valve body or the solenoid pack replaced, with dates and mileage.

Check the VIN for the programs above, especially the GM special coverage: on a truck whose VIN is on the special coverage list, a dealer-confirmed P0747 valve repair should be free within 15 years or 150,000 miles; get the dealer to confirm the VIN before you buy.

Walk away from: a transmission with a quote on the table, burnt-smelling fluid, a seller who cleared the codes this week, or a truck that has had three valve bodies.

Clearing P0755 or P0740 before an inspection

A cleared code is not a repaired one. Stellantis's case tells the technician to "Clear all DTCs" and then drive 15 minutes in the city and 15 on the highway to see whether the code returns, which is the honest version of the same idea. A code cleared at the inspection station returns after the drive cycle, and one Dodge Journey owner writes that the light came back after about 100 miles. If a state inspection is due, fix the cause first: clearing codes also resets the car's readiness monitors, which many inspections check.

What a shop actually does with P0755 or P0740, checkpoint by checkpoint

1. Reads the codes and the freeze frame. Ask for them in writing.

2. Inspects the connector and the harness. At the shop, ask whether the main transmission connector was inspected and by whom.

3. Checks the battery and the charging system. Ford's bulletin for the 7.3L 6R140 and Toyota's tech tip for the 2016 Scion iA both say to charge the battery before any transmission repair.

4. Looks up the bulletin or the special coverage for the VIN. At the shop, ask for the number.

5. Tests the solenoid and the valve body. Resistance, a scan-tool command, a pressure or leak test. At the shop, ask for the failed result.

6. Quotes. The solenoid pack, the valve body, the converter and the transmission each carry their own number; a quote without a test result is a guess.

Three traps that cost owners the most

Trap 1: the solenoid pack on a code alone. Stellantis found solenoid packs replaced for P0755 and neighbors with no fault; 50 of 225 solenoid complaints say the problem came back.

Trap 2: the transmission on a circuit code. Hyundai and Nissan print "Do not replace the transmission" and "Do not replace CVT" for these model-specific circuit codes; 257 complaints end with a transmission, and 79 say it came back.

Trap 3: paying before the special coverage check. The GM, Lexus, Ford and Ram programs above are free on the right VIN; GM's printed dates for repayment of earlier repairs (31 December 2025 and 31 March 2026) have passed, and N252536751 asks for requests as soon as possible, so check before you pay and ask even after.

Three composite scenarios

These are composite scenarios, not individual customers. They use only facts and price ranges in this guide.

A 2021 Ram 2500 diesel with P0755 and P0765 and harsh shifts. The shop quotes a solenoid pack. The owner asks about the connector and the software first. The shop inspects connector D29A, reads the calibration and checks the VIN against the flash bulletins that list P0755. Result: Route 1 or Route 2, no part until a test fails. If the codes return, the next step is event data and then the pack.

A 2022 diesel Silverado with a reduced-power message and P0747. The dealer says valve body and the part is on backorder. The owner asks for the special coverage number and the VIN check, which covers the valve at no charge on the printed terms, and asks whether the software update was done. Result: Route 5 under coverage. The owner confirms the recall software that limits the truck to fifth gear is installed and has the truck towed if it goes into limp mode, will not move or drops out of gear.

A 2015 Dodge Grand Caravan with the 62TE and P0740, the light on after a solenoid job. The shop says transmission. The owner asks for the converter solenoid test result and Stellantis's order for 62TE vehicles: check the solenoid and, if it is fine, the codes point to the converter. Result: Route 4 or 5, with a test result in hand, and a written quote.

The plan: 10 minutes, today, this week

Today (10 minutes). Write down every code. Note whether the battery was low or jumped. Check the fluid if there is a dipstick. Look up the VIN for the programs above.

This week. Ask a shop for the connector inspection, the software check and the bulletin. Ask the dealer about special coverage by VIN. Do not agree to a solenoid pack, a valve body or a transmission without a failed test result in writing.

If the car loses drive. Pull over and tow. Do not drive it to the shop.

Sources and documents

Every maker document we quote or rely on is listed here with its NHTSA number. Links go to the PDF on NHTSA's site; the full list of the 448 documents we went through, with what each is and whether it names a code, is published as a file.

• Stellantis case S2121000008 REV. C — connector D29A, June 2022
• Stellantis tech tip 9003769, 11/01/2017 and the 10/18/2017 version — P0755, 2017 Journey
• Stellantis tech tip 9004380 — event data, 05/26/2021
• Stellantis 18-093-22, 18-005-23 and 18-072-23 — Ram diesel flashes and the ECM capacitor leak
• Stellantis 18-010-21 REV. A, REV. B and 18-101-22 — Cummins PCM flashes that list P0740
• Stellantis tech tip 9004009 and 9004206 — P0740 or P2764 on 62TE vans
• Stellantis campaign V46 — ProMaster solenoid pack, November 2019
• Jeep 08-141-23, RSU 23-165 — 2023 Compass harness, P0983
• Ford SSM 46719 — connector C168 pin 14
• Ford SSM 54899 — 6R140, low or jump-started battery
• Ford 6R80 bulletin 10058228 — solenoid-to-leadframe contamination, March 2015
• Ford SSM 46355 — 6F35 binding shift solenoid B
• Ford 25-2132, 25-2423 and 26-2226 — 10R80 clutch cylinder sleeve, one-way clutch, PCM software; Ford 20-2185 and 21-2044 — valve body replacement to break-in routine and overhaul
• GM PI1344A and PI1344C — P0751, clutch select solenoid valve 2
• GM PIP5100A — shrink-wrap; GM PIE0371A — no root cause yet
• GM special coverage N242454441, N242480631 and N252536751 — worn control valve, P0747
• Toyota T-SB-0018-18, T-SB-0160-18, T-SB-0094-24 and Lexus L-SB-0005-19 — P07407E, P07457F, P07407F
• Toyota tech tip S-TT-0097-15 — dead or jump-started battery on a 2016 Scion iA
• Nissan NTB15-037b — control valve; Infiniti ITB23-022 — P0744 reprogram
• Hyundai 18-AT-016, Genesis 16-AT-011 and Kia TRA 051 — solenoid, harness, then computer
• Subaru 16-80-11R and 16-149-25 — flush first; connector moisture
• Mazda 05-003/14 — valve body for P0780 or P1738
• Recalls: Lexus 26V094, Ford 25V164, Ram 24V413, GM 24V797, GM 25V148, Ford 16V248, 24V444 and 19V075, and FCA 16V529
• Our repair guides for the ⚪ price lines: transmission repair cost, transmission fluid change cost, P0700 and P0741

How we did this. The sorting rules were written, dated and fixed before any complaint was sorted (the sorting rules); every complaint was then sorted twice, independently, from those rules alone, and where the two sortings differed the difference was settled by a written rule that is listed in the same file. The two sortings matched on 92% of the category and 96% of the stall flag. After the first 656 complaints, a second, independent search of the whole complaint file for what the first had missed added 991 more, sorted the same way. We went through 448 documents: 257 read in full, 191 compared line by line with a document read in full, and the papers of ten recall campaigns. Scanned pages were read as page images. Every quotation was checked word for word against the document or complaint text, except quotes from page images. How we did it has the detail, including what was left out: transmission wiring-harness and lead-frame complaints that name no solenoid and no code (668) and mechatronic-unit complaints (202) were found by the second search and set aside.

Complaints over-represent failures, refusals and expensive repairs, and many owners write before a diagnosis. The file was built from searches that include valve body complaints with a shift symptom, so the valve body's lead in the ranking is partly a product of what was searched, and the Chevrolet, GMC and Ford counts are large partly because those trucks are common. Most narratives carry no code, so the code counts are small. Counts count complaints, not cars; a few owners filed more than once. Coverage status is our computation from the printed terms; nobody prints your car's in-service date.

Prices verified October 2026 against our repair guides (transmission repair cost, transmission fluid change cost); owner figures are what people told NHTSA. Technical documents verified October 2026 against the NHTSA copies listed above.