P2101 Reduced Power: Throttle Motor, Software or Wiring?

P2101 is a code about a motor, not a verdict on a part. With drive-by-wire, the pedal sends a signal, the computer opens the throttle plate, the engine's air valve, with a small electric motor, and sensors report where the plate really is. P2101, whose standard name is "throttle actuator control motor circuit range/performance", says the plate did not go where the computer commanded; it does not say why.

This page answers four questions: why is the engine in reduced power, is it the throttle body motor, the wiring or the software; can I drive; what does it cost; and who pays. It covers P2101 and the motor-side codes the maker papers tie to it: P2100, P2111, P2112, P2118, P2119, P2176 and P2109 (one Subaru). P2008 is here only because the same search brings it: a flap in the intake manifold, with its own short section. The pedal and throttle position-sensor codes (P2122, P2127, P2135, P2138) are a different fault: P2138 and P2135.

The headline. Few of the papers counted here say "replace the throttle body". 2 of the 25 families end at a new throttle body; 5 end at software or the engine computer, 2 at carbon or a frozen crankcase vent, 2 at an air filter or air duct, 3 at wiring or a power module, 1 at battery checks, 1 at a showroom tool, and 9 at no repair (the maker is investigating, says not to replace anything, or only corrects a test procedure). How we count: a family is one series of maker papers on one matter, revisions counted once; one matter can have more than one series (GM's P2101 on 2017 to 2019 full-size trucks is three: an open engineering notice, a battery-check note and a software bulletin; a CTS-V air filter fault is two). The 25 name P2101 in their own text; papers that print only a sub-typed form such as P210185 are not counted (P210100, the plain form with a 00 suffix, is), and three older GM covers that name it only as a check after a sensor repair, and replace the throttle body if it is set, are on the P2138 page. Nine more families are throttle-body programs and bulletins, tied to the sister codes only in part (four print P2111, P2112 or P2100); five of the programs have ended. Counting them, 11 of 34 families end at a new throttle body (2 of the 25 on P2101). In the complaints the picture is the reverse: a throttle body is named or replaced in 30% (818 of 2,726), and 51% (1,397) state no cause.

What the page rests on. NHTSA, the US safety regulator, files carmakers' service papers and owner complaints. Of all complaints received from January 2015 through early October 2026, only 28 spell out the two codes this page is about: 27 name P2101 and 1 names P2008; 344 name a code from the throttle-motor list, mostly P2111 (129) and P2112 (152). The 3,251 we sorted are the complaints our searches found for a throttle-control event in the owner's words: 2,726 describe one on the owner's own car and 525 do not. Read every count as "complaints describing a throttle-control event", not "P2101 complaints".

Is a P2101 code a failed throttle body, and is it safe to keep driving? Usually the carmakers' papers do not start with the throttle body: of 25 families of maker papers counted on P2101, only 2 end at a new one and 5 at software or the engine computer, and in the 3,251 owner complaints PulsCar sorted, 30% end at a throttle body while 51% name no cause. Before buying one, ask a dealer to run your VIN for a recall or software update, have the battery tested and look at the throttle's plug. On driving: if the car drops into reduced power or limp mode, loses power in traffic, stalls or the check engine light flashes, pull over safely, engine off, tow; the only exception is the one in the rule at the top. A steady light on a car that has never lost power is not an emergency: book a shop within days.

🟢 marks a claim resting on a document in the Sources section; ⚪ marks a shop-price estimate carried from our repair guides. Every complaint count comes from the 3,251 complaints we sorted. Reduced power and limp mode: the computer limits power and speed. Bulletin (TSB, SSM): a maker's repair instruction to dealers, not a recall. VIN: your car's 17-character ID. ECM/PCM: the engine computer. ODI: NHTSA's complaint number.

What P2101 says: the plate and the command disagree

The computer commands a plate position and reads it back. P2101 says the two did not agree closely enough or fast enough. Ice or carbon can stick the plate, the motor's contacts can be dirty, a wire or plug can add resistance, the voltage can sag, or the software can misjudge the test; the code cannot tell these apart, and neither can a driver. 🟢 Ford describes its 3.5L F-150 case as "reduced engine power on startup and an illuminated powertrain malfunction (wrench) indicator with diagnostic trouble code (DTC) P2101 stored in the powertrain control module (PCM)".

The code does not measure how bad the fault is. 🟢 Ford says that case can be removed by switching off for at least 30 seconds and restarting; 🟢 GM's notice for the 2017-2018 Colorado and Canyon 3.6L lists an engine that "stalled and not able to restart." Same code, different stakes, which is why the first rule on this page is what the car does, not what the code says. Nissan prints the name as "ETC FNCTN/CIRC-B1"; Toyota and Mercedes-Benz print the codes with a two-digit fault-type suffix (P210015 and P210019 are P2100 forms, P211172 a P2111 form, P210185 a P2101 form).

First: P2101, P2100, P2111, P2112, P2118, P2119, P2176, P2008 ... which one is yours

Only codes the papers print are here; counts are complaints that name the code.

The maker atlas: who prints software, ice, carbon, wiring or a throttle body

The throttle-body programs in these papers are mostly old: Ford's four ended between September 2017 and May 2019, and Mazda's Tribute extension is over for every car (dates in the coverage file). Of the 25 families counted above, only GM's gel notice names a new throttle body as the repair outright, and only for vehicles built before a set VIN; Nissan's recall replaces it only if P2101 or P2119 is stored. (Three older GM papers on sensor-fault cars are on the P2138 page; only one, 14582A, replaces the throttle body outright, on Bosch-built ones. The other two replace a sensor or its cover first and the throttle body only if P2101, P1516 or P2176 is still set.)

The do-not-replace lines: what the papers tell a shop to hold back

Several makers print a line like these. None says the throttle body is never the cause; each says that, for the complaint described, something comes before it.

• GM, 2017 trucks (PIP5501B): 🟢 if the freeze frame matches, "Do not replace any parts."; test the battery first, then the voltage lost across the battery cables while cranking, which "should not exceed 200 mV."
• GM, CT5 (PIP5756): 🟢 "Unless you're instructed through the diagnostic procedure in Service Information do not replace Throttle Body assembly for history DTC P2101."
• GM, CTS-V (PIP5424A) and Volt (PIP5513): 🟢 "Do not replace ECM, Throttle Body." and "Do not replace the throttle body if P2119 is the only code set."
• Ford (SSM 46266): 🟢 "For all ETB concerns, the appropriate diagnostic must be completed before throttle body replacement."
• Mercedes-Benz (LI54.18-P-057927): 🟢 "Please do not replace any components!" and "Contact spray must never be used on contacts on the engine wiring harness."
• Toyota (T-SB-0043-20): 🟢 "The ECM/PCM should NOT be replaced as part of the Repair Procedure."
• Honda (2023-2024 Accord and CR-V hybrids, April 2024): 🟢 "No repair attempts (do not remove throttle body)." where P2101 and corrosion on the intake side of the throttle body are found: a parts request that expired April 25, 2024, because Honda wanted the part for study.

P2008 is a different part: the intake manifold runner

P2008 is the intake manifold runner control circuit: a flap or valve inside the manifold that changes the air path, not the plate that meters the air. It is here because searches for both codes overlap. One complaint in our set names it (a 2008 Dodge Avenger, NHTSA complaint 11220772, with P2017). The papers:

• 🟢 Hyundai (21-EM-008H) lists P2008, P2009 and P2010 as "Driver IC error (ECU or VCM)" on certain Sonata, Santa Fe Sport, Santa Fe, Tucson and Veloster N of model years 2015 to 2022; the shop is to test the VCM motor and replace the motor or, if the lever arm is damaged, the lever arm with a service kit, not the whole manifold: "Do not replace the entire Intake Manifold Assembly."
• 🟢 Chrysler, Dodge and Ram: "Caution - Do not replace the intake manifold for a short runner valve (SRV) fault (P1004 / P2008 / P2016 / P2017)" for 2008-2009 3.5L cars (tech tip 9001645); a software update for the 2013 Ram 1500 and 2012-2013 Ram 2500 CNG (18-100-16); and "a spread terminal" in the valve's connector (S2308000109).
• 🟢 Nissan and Infiniti: P2008 is one of four codes in a bulletin about how permanent codes are stored and erased: "The ECM reprogram in this Service Procedure is not a repair for the DTC, but instead updates the way the permanent DTC is stored and allowed to be erased." (NTB19-045a)

None of these is about the throttle motor, and none tells an owner to stop driving. If your code is P2008, the throttle body routes below do not apply; the 10-minute check does.

The 10-minute check

Do this only if the car starts and drives normally. If it is in reduced power, you are not doing a check, you are stopping.

1. When did it happen? (2 minutes). Cold morning, after the car sat, or when warm? 🟢 Mazda's CX-9 paper (codes P0638 and P2112) makes the answer a test: it is "most likely applicable if the concern can be resolved by turning the ignition switch on/off when the vehicle is parked in a warmer location". Ford's 3.5L message says to switch off for at least 30 seconds and restart.

2. Battery and terminals (2 minutes). 🟢 GM's 2017 truck paper puts a battery test and the cable connections before any part; Toyota's P2118 tip lists the battery, its terminals and the throttle-system fuse; a parts store tests a battery free.

3. The connector and the wires (2 minutes). Engine off and cool: find the throttle body where the air duct meets the engine; is its plug seated, dry and clean, the harness clear of sharp edges? 🟢 GM's notice for the 2017-2018 Colorado and Canyon asks the shop to confirm the connector "was properly seated". Spray nothing into the plug (our advice; Mercedes agrees, above).

4. The air path (2 minutes). 🟢 "Ensure that the inlet air duct to throttle body is not out of place and installed correctly." (GM, same notice.) On some 2016-2017 CTS-V, a filter without glue beads can fold, cut the duct and stall the engine (Route 4).

5. Every code, with the freeze frame (1 minute). 🟢 Stellantis tells the shop to check what else is stored before following the P2100 procedure. Many parts stores read codes free.

6. Run your VIN (1 minute) at nhtsa.gov/recalls; ask a dealer later.

Six P2101 situations, and which is yours

"It cut out or went to reduced power." The rule at the top applies: pull over, engine off, tow. Once the car is off the road, Routes 1 to 5 in order.

"P2101 on start-up, gone after a restart, on a 3.5L F-150 built from October 2022, or a 2023 Expedition or Navigator." → Route 2.

"Reduced power only on freezing mornings." → Route 3.

"A 2024 or 2025 Rogue." The recall comes first. → Route 1.

"The code appeared after a dead battery, a jump, or opening the door of a GM truck." → Route 4, then Route 2.

"A new throttle body and the same code." → Route 4 first, because the papers print causes outside the part.

The P2101 price ladder, from the bottom up

How much does it cost to fix P2101, and when is the throttle body the wrong first purchase? It costs $0 when a recall, program or warranty repair applies, and a few hundred dollars when the cause is a battery, a reprogram or a diagnosis. PulsCar's guides carry a code read at $0, a diagnosis at $80 to $150, a reprogram outside warranty at $0 to $200 and an electronic throttle body installed at $300 to $800. Among the 2,726 owner complaints, 229 dollar figures in 210 complaints tie to diagnosing or repairing a throttle-control event, 133 of them bills or amounts paid: throttle-part figures run $60 to $4,500 with a median of $591, diagnostic fees $90 to $219, cleaning $10 to $1,059. So the VIN, the weather, the battery and the connector come before any part is bought.

The five P2101 routes, cheapest first

Each route is a place the reduced power can come from, ordered by what it costs to rule out, cheapest first; each gives how common its ending is in the complaints. "Came back" means the owner says the same light, code or symptom returned. A throttle body named or replaced is the most common named ending (818 of 2,726, 30%) but sits last, because it is a parts purchase and the papers ask for the cheaper causes to be ruled out first. Software, ice, a plug or a battery end only a few percent of complaints each, yet they are where the maker papers point; 51% of complaints state no cause, so the real mix is unknown.

Route 1 · A free repair: a recall, a program or a software update — $0 when it applies

What it is. The maker has put a free fix in writing. Only 26 of the 2,726 complaints (1.0%) end at "software or campaign only", yet 581 (21%) mention a recall, bulletin, program or special coverage, so ask before you pay. The one active throttle-motor recall in our set is Nissan's.

What the documents say.

• 🟢 Nissan recall 26V-081, 2024 to 2025 Rogue with the 1.5L: "The gears in the electronic throttle body assembly may break." and "Broken throttle body gears can cause a loss of drive power, increasing the risk of a crash." 318,782 vehicles, free: dealers "will reprogram the engine control module (ECM) software and inspect and replace the electronic throttle body assembly as necessary, free of charge." The dealer bulletin makes the part conditional: "Is DTC P2101 and/or DTC P2119 stored in Engine?" and, if so, "Replace the Electric Throttle Control Actuator" before the reprogram (recall 26V-081).
• 🟢 Ford, motor contacts: "the electronic throttle body (ETB) internal motor contacts may develop contamination resulting in increased electrical resistance." Programs 16B23 and 17B28 replaced the throttle body at no charge, and 16B32 replaced it or reprogrammed the computer, depending on the model; 16B32 ran "through September 30, 2017. There is no mileage limit for this program."
• 🟢 GM, 2021 Colorado and Canyon 2.8L diesel: a throttle body motor that "may intermittently cause the throttle body motor to fail to complete the throttle position learn cycle within the allowed time", covered for 15 years or 150,000 miles, throttle body only if GM's diagnostics lead there (N242445290).

What the owners report. 63 complaints name Ford's 13N03 (47), 16B32 or 16B23 (15) or 17B28 (1); at least 20 say the program was refused or did not cover their car. "FORD HAS ISSUED A CSP 13N03 BUT IT DOES NOT INCLUDE MY VIN NUMBER BUT SHOULD." (ODI 10749499, 2010 Fusion Hybrid.) A 2024 Rogue owner's complaint reached NHTSA on 24 February 2026, three days before Nissan's filing says VINs became searchable, and says the dealer had "cleaned the throttlebody charge me $1053" and "my VIN number is not showing up." (ODI 11720317.)

The cheap cause that gets skipped. The lookup. Safety recalls show at nhtsa.gov/recalls; campaigns, updates and emission recalls need a dealer and your VIN.

Fix it yourself. The lookup only; the repair is the dealer's.

At the shop — say this: "Please run my VIN for any recall, campaign, special coverage or software update that names P2101 or this reduced-power message on this engine, and write the answer on the repair order before any part is ordered."

Route 2 · Software and relearn — $0 under a bulletin, $0 to $200 for a reprogram in our guides

What it is. The computer's program misjudges the throttle test, or the throttle and idle positions must be learned again. 26 complaints end at software or a campaign (1.0%) and 15 at a replaced or repaired engine computer (0.6%); 8 of the 26 and 7 of the 15 say the problem came back, groups too small for a rate.

What the documents say.

• 🟢 GM, 2017 to 2018 full-size trucks and SUVs, and 2019 Silverado and Sierra: "anomaly in the ECM initializes the Electronic Throttle Control (ETC) Diagnostics when the DDOP occurs and falsely sets DTC P2101." (DDOP is Driver Door Open Prime, a cold-start feature.) The fix is a reprogram, and "No parts are required for this repair." (18-NA-037, 2017 to 2018 trucks and SUVs; the March 2019 version adds the 2019 Silverado and Sierra, which use a wake-up fuel pump prime instead of the door-open prime) The 2025 Equinox and Terrain: "DTC P0601 Missing from Vehicle, Setting DTC P2101 Instead" (25-NA-002).
• 🟢 Ford, 2022 to 2023 3.5L: "This may be due to the software level of the PCM." (23-2364), superseded by 25-2320 ("This bulletin supersedes 23-2364."). Before the fix, SSM 51827 offered a restart after 30 seconds.
• 🟢 Honda: "The PGM-FI misinterprets the electronic throttle control system and sets DTC P2101." on the 2012 to 2013 Ridgeline (15-028); "The PCM misinterprets the throttle position sensor signals and sets DTC P2176." (Acura 14-052); on the four-cylinder 2013 to 2015 Accord, software, then "Do the PCM idle learn procedure (refer to the service information)." (19-034)
• 🟢 Toyota and Stellantis (sister codes): Toyota's freezing-weather bulletin, for P210015, P210019 and P211172: "The Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM) logic has been modified to reduce the possibility of this condition." (T-SB-0092-23); "This bulletin involves reprogramming the PCM with the latest available software." for P2100 on the Gladiator (18-042-22).
• 🟢 Nissan Sentra, NTB25-005: no part and no software, only a revised check: ignition on for 2 seconds, idle for 5 seconds, read the code (NTB25-005). Mitsubishi (2010-2012 Outlander 3.0L, P2100, freezing): "DO NOT reprogram the ECM until the reason(s) for other DTCs being set is corrected." (TSB-13-13-005)

What the owners report. A 2016 Fusion owner: "THE FIRST TIME THIS HAPPENED THE DEALER WOULD ONLY REPROGRAM THE ECU DESPITE ME ASKING THEM ABOUT THE ETB." The second time was in busy interstate traffic (ODI 10924509). A 2023 Accord Hybrid owner paid about $670 for a throttle body and a software update in one visit (ODI 11751783).

The cheap cause that gets skipped. The software level. Ask whether a bulletin names your engine and code, and which software version the car had before and after.

Fix it yourself. The restart test only, after you are stopped safely (rule at the top). A restart that works is not a repair and does not cancel the rule: Ford's message for the 3.5L says to switch off for at least 30 seconds and restart. A software update needs the maker's tool and a battery held at a set voltage: shop work.

At the shop — say this: "Is a software update listed for this engine and this code? Please write the software level before and after on the repair order, and tell me which throttle or idle relearn you did afterward."

Route 3 · Cold, ice, water, carbon and contamination — $15 for a can, $80 to $150 at a shop in our guide

What it is. The plate or its motor is stuck or fouled by something other than a failed part: ice, water behind the throttle body, carbon, or contamination inside. 28 complaints end at cleaning only (1.0%), 8 of them say the problem came back, and at least 8 describe ice or frozen moisture at the throttle. Thirteen families of papers tie the fault to freezing weather; ten print ice, water or frozen moisture as the cause, and three (two Toyota series and a 2023 Mazda) print only the cold. Owners rarely use those words.

What the documents say.

• 🟢 Ford, 2019 to 2021 Ranger and 2021 Bronco (P2111, P2112, P2119): "This may be due to water or ice buildup in the intake manifold behind the throttle body." The shop removes the throttle body to look; "If water or ice is found, replace the intake manifold" and a vent hose, not the throttle body (SSM 50203).
• 🟢 Ram 1500 3.6L (09-023-23): "CAUSE: Throttle body blade icing up." and "NOTE: It is not necessary to remove the throttle body from the engine." The fix is drying, a kit and an oil change. Stellantis case: "check for ice build-up in the throttle body. If ice build up is present, warm the vehicle indoors." (S2218000003)
• 🟢 Kia Carnival, Mazda CX-9, Subaru WRX: "The throttle body plate may freeze after a cold soak in very cold temperatures, possibly causing the vehicle to go into “limp-home” mode." (SA514); "This concern may be caused by condensed water in the intake manifold entering the throttle valve." (01-001/18); "P2109 is cause by the throttle body becoming frozen in the closed position." (09-102-23)
• 🟢 Carbon and contamination: "As carbon builds up in the throttle body of a high mileage vehicle, the ECM/PCM learns to compensate by increasing the throttle plate angle." (PIP4578B), with cleaning per GM's service information and an idle learn reset afterward; Honda's "The throttle body contains heavier than normal carbon buildup." (19-034); and, for the 2019 XT4, Silverado 1500 and Sierra 1500, "Cause: Possible Throttle Body Internal Gel Contamination Issue." with a new throttle body for vehicles built before VIN KF207339 (PIP5660B).

What the owners report. A 2024 Ram 1500 owner was told by the dealer there were "active codes and ice buildup on the throttle body" and to make sure the truck warms up to burn off the moisture (ODI 11717575). On cleaning, a 2007 Freestyle owner wrote "THIS INEXPENSIVE REPAIR RESOLVED THE ENGINE LUNGING ISSUE." (ODI 11290472), while another wrote "DID A THROTTLE BODY CLEANING AT MY REQUEST. STARTED OK FOR 2 WEEKS AND IS NOW DOING THE SAME AGAIN." (ODI 10920403.)

The cheap cause that gets skipped. The weather question. If it happens only after the car sat in the cold and clears when warm, say so first: Mazda's paper uses exactly that as the test.

Fix it yourself. Write down the pattern: cold start, temperature, whether a restart or a warm garage clears it. No paper we found tells an owner to clean a throttle body at home; GM's cleaning needs a scan-tool idle learn afterward (shop work), and our throttle body guide and P0505 guide cover both.

At the shop — say this: "Does it only fail in the cold? Please check the throttle body, air duct, crankcase vent (PCV) hose and intake for ice, water, oil or carbon, tell me which bulletin you follow, and relearn the throttle after any cleaning."

Route 4 · The plug, the wire, the ground and the battery — ⚪ $100 to $350 for a battery and $150 to $400 added for wiring, in our guides

What it is. The motor gets its power and ground through a plug and wires, and the computer needs steady voltage to run its test. 45 complaints end at wiring or a connector (1.7%) and 12 at a battery or charging fault (0.4%); 21 of the 45 and 6 of the 12 say the problem came back, groups too small for a rate.

What the documents say.

• 🟢 Contacts and pins: "The fault entry could have been caused by occasional transition resistance at contacts." on Mercedes-Benz engines 270 and 274 (throttle actuator or oxygen-sensor faults), with a new set of female contacts on the engine computer's plug only if it recurs (LI54.18-P-057927); "Increased electrical resistance in pins for left and right throttle actuators." on the M177 (LI07.10-P-080384).
• 🟢 Chafed harness: Ford, for the 2012 to 2014 Focus 2.0L: "Visually inspect the engine harness for chafing against the intake manifold, near the throttle body." with P2111 and P2112 among 17 codes (18-2062); for the Transit Connect 2.5L, P2101 is one of 40 codes: "Visually inspect the 12A581 engine harness, 25-30 cm (10-12”) below the PCM connector, for wire chafing on the transmission." (16-0163)
• 🟢 A power module: after a drive below freezing and a 10-minute park, "The engine will start, but the engine will not respond to throttle pedal input," with P2100 or P2101 stored: "Replace the Intelligent Power Distribution Module (IPDM)" on the 2014 Versa (NTB16-066).
• 🟢 Battery: GM puts a freeze-frame check, a battery test and the cable connections first, with the voltage lost across the battery cables while cranking under 200 mV (PIP5501B), and an older GM paper says "A weak battery may affect throttle plate operation when cold." (PIP4573B). Toyota's tip calls P2118 "misdiagnosed as a throttle body concern": the throttle-system fuse, battery or terminals.
• 🟢 Air path: on some 2016-2017 CTS-V an air filter without glue beads can fold in aggressive driving, collapse or cut the duct, stall the engine and set throttle codes (17096); GM's notice for the 2017-2018 Colorado and Canyon starts with the inlet duct (PIE0444).

What the owners report. A 2013 Escape owner had the throttle body replaced, then the same 8 mph crawl; the dealer suspected a wire harness at $2,000 and later a purge valve (ODI 11337868). A 2020 Kicks owner paid $1,143.69 for a throttle body, then was quoted $8,057.83 for an engine harness (ODI 11757117). Two 2015 Accords set P2101 with hard-start or no-start trouble; one owner wrote "FIRST TIME, AAA CHECKED AND CHARGED BATTERY AND A ERASED P2101 CODE." (ODI 11340884).

The cheap cause that gets skipped. The battery and its terminals. A parts store tests a battery free, and GM's papers list a weak battery among the causes.

Fix it yourself. Look at the battery terminals (tight, clean, no corrosion) and get the free battery test. With the engine off and cool, look at the throttle's plug and the harness near it for oil, rubbing or a loose fit, and spray nothing into it. Wire repair, a ground check and a voltage-drop test are shop work.

At the shop — say this: "Please test the battery and charging voltage, then check the throttle motor circuit for voltage drop and wiggle-test the connector and harness before replacing anything. If you repair a wire, show me where it was chafed."

Route 5 · The throttle body, the computer and other parts — $300 to $800 for a throttle body in our guide; owners report a median of $591

What it is. The throttle body (the plate, its motor and gears, or the sensor inside) has failed, or the engine computer has. 818 complaints (30%) end at a throttle body named by a shop or replaced; 141 of them (17%) say the problem came back, 196 (24%) describe a stall and 628 (77%) reduced power. Ford is 480 of the 818 (F-150 96, Fusion 69, Edge 62, Explorer 54, Escape 44). 15 complaints end at the computer (0.6%) and 81 at a pedal or position sensor, which is the P2138 page.

What the documents say. Nine more families call for a throttle body for the sister codes (16B32 also lets the dealer reprogram the computer instead, by model). Four print a sister code (P2111, P2112 or P2100): Ford 16B32 and 17B28, FCA 09-003-20 and Lexus L-SB-0032-25. The other five print none of the three: Ford 16B23 and 18B34-S1, Mazda SSP95, GM N242445290 (P122D) and Hyundai 19-FL-005H, a 2015-2016 Genesis paper (P0638, P061B). Five have ended. Of the 25 families counted on P2101, the two that call for a throttle body are GM PIP5660B (Route 3) and Nissan 26V-081 (Route 1).

• 🟢 Ford 18B34-S1: "A misinstalled torsion spring may cause illumination of the wrench light or service engine soon indicator with reduced engine power." Replace the throttle body; the program ended May 31, 2019 (18B34-S1).
• 🟢 FCA, 2019 to 2020 Cherokee, Compass, Ram 2500 and Charger: "This RRT only applies to vehicles on the RRT VIN list."; replace the throttle body only if its stamped Julian date falls in a printed range with no green dot (09-003-20).
• 🟢 Lexus, V8 sports models (P0505, P2111): "Install the NEW throttle body assembly with motor and ventilation hoses no. 2 and no. 3." (L-SB-0032-25)
• 🟢 Computer last: GM, for the 2025 Equinox: "Follow diagnostics for P2101.", ECM only if that does not correct it; Toyota's T-SB-0005-24, one of its freezing-weather bulletins, replaces the computer and the fuel pump together because "This ECUs software is calibrated to a specific fuel pump output" (T-SB-0005-24 Rev2).

What the owners report. A 2021 Blazer owner reports a throttle body replaced at about 55,000 miles after P2101 and limp mode (ODI 11714381); a 2015 F-150 owner reports the truck still shutting off after the dealer replaced it (ODI 11384207). A 2020 Altima owner says three throttle bodies, about $4,500, did not stop the limp mode (ODI 11656442). A replaced part the owner says did not help counts as "no cause stated", not in the 818; the 141 are cases where the trouble returned after a repair or reset.

The cheap cause that gets skipped. Everything above: the papers that print P2101 mostly end before this route.

Fix it yourself. Nothing, until Routes 1 to 4 are ruled out. Do not buy a throttle body because a scan-tool graph looks odd: Ford's SSM 46085 says two scan-tool readings refresh too slowly to show a fast fault and "will lead to inaccurate results and improper ETB replacements." After a swap the throttle must be relearned; FCA's paper says "Ensure any Electronic Throttle Control (ETC) relearn routines have been performed after replacement of the throttle body."

At the shop — say this: "Before a throttle body: please show me the stored code and freeze frame, the test that points to the motor and not the plug, battery or software, and the bulletin you are following. After the swap, please do the relearn, and tell me what the part and the labor are warranted for if the code comes back."

The coverage file: which recalls and programs run in October 2026

The status column is our arithmetic from the printed terms, as of October 2026, not a promise from any maker. Where no end date is printed, the VIN and the warranty decide. GM's special coverages 11273A and 14582 (throttle position-sensor covers) are on the P2138 page.

Campaigns, updates and programs are not in the safety-recall lookup: nhtsa.gov/recalls may show nothing for a Ford program or a GM coverage, so the dealer with your VIN is the lookup.

What 3,251 complaints show

The set. We took NHTSA owner complaints received from January 2015 through early October 2026 that name a motor-family code, intake runner wording, or a throttle part together with reduced-power wording (1,462, all sorted); a random sample of 1,000 of the 3,042 that matched only a throttle part with another symptom such as a stall, hesitation or loss of power (the other 2,042 are in a published file); and 789 more found by a wider search of the whole file. Many more narratives of the same kind exist and were not sorted (at least 400 more name a throttle body and more than 1,000 carry an "engine power reduced" message), so shares describe these 3,251, not all such complaints. Each complaint was sorted by the same written rules, published as the sorting rules and how we counted. 2,726 describe a throttle-control event on the owner's own car; 525 do not.

What the largest group means. "No cause or repair stated" is 51%, often because a complaint is written the day the light comes on, and it holds cases where a replaced part did not help. It does not mean the throttle body was fine, or bad.

Who and when. Ford 1,167 (43%), Chevrolet 496 (18%), Jeep 161 (6%), Dodge 100 (4%), GMC 94 (3%); the F-150 alone is 248, the Fusion 175, the Malibu 144. The median model year is 2012 and 1,118 (41%) were received in 2015 and 2016. The set is old cars, while several papers on this page are about new ones: the 2,726 hold 5 complaints on 2024 to 2025 Rogues, 6 on 2023 to 2024 Accords and CR-Vs, and none on a 2023 Acura RDX or TLX.

What happened. 2,203 describe reduced power, limp mode or no response to the pedal (81%), 673 a stall (25%), 581 a recall, bulletin, program or special coverage (21%) and 740 a problem that came back (27%). It came back in 32% of the no-cause group (448 of 1,397) and 17% of the throttle-body group (141 of 818).

The 28 that spell out P2101 or P2008. 14 were received in 2022 or later, 9 in 2026 alone; 17 describe reduced power and 5 a stall; 14 state no cause, 8 end at a throttle body, 4 at another cause, 1 at the air intake and 1 at a check that found nothing.

• P2101, 27 complaints: 10679536 (2008 Aveo), 10694238 (2010 Traverse: P2101 or P1122, the owner is not sure; dealer split the cost, throttle body not covered), 10724582 (2011 Malibu: reduced power at start), 10825149 (2013 A3 TDI: sensor, stall, computer, then a harness suggested), 10939109 (2009 Aveo: held to 10-15 mph), 11022125 (2006 Mountaineer: dies on the highway), 11056736 (2015 Altima), 11075272 (2013 Escape: VIN not on 13N03), 11103827 (2005 Corvette), 11109828 (a shifter cable and transmission, not the throttle), 11218359 and 11340884 (2015 Accords, battery trouble), 11341400 (2017 Titan), 11474220 (2012 Versa), 11500665 (2016 Journey: limp mode on the freeway), 11546276 (engine failure), 11667564 (2021 Wrangler: lost power at a light), 11682731 (2022 Tiguan), 11713618 (2023 Santa Fe), 11714381 and 11719088 (the same 2021 Blazer, twice), 11720317 (2024 Rogue), 11726630 (camshaft failure), 11747712 (2019 C 300), 11751783 (2023 Accord Hybrid), 11761629 (2023 CR-V Hybrid: AAA advised against driving and called a tow) and 11762547 (2022 Sierra: hunting idle, reduced power).
• P2008, 1 complaint: 11220772, a 2008 Avenger whose owner blames a runner flap that sticks open and writes "ALMOST REAR ENDED CAR IN FRONT OF ME."

When the engine dies in traffic: the safety side

Across the 2,726, 738 mention being on a highway, freeway or interstate and 206 "in traffic" (word mentions). Of the 673 stalls, 92 say "no warning" or "without warning" (14%), 69 mention the steering (10%), 62 the brakes (9%) and 244 a restart (36%). A 2016 Fusion owner: "THE SUDDEN LOSS OF ENGINE POWER NEARLY CAUSED ME TO BE STRUCK BY OTHER VEHICLES." (ODI 10924509.) In NHTSA's own fields, 23 of the 2,726 are marked as a crash, 8 as a fire, 12 with an injury (15 people), none with a death, and 72 as towed. In our reading of the 23 crash complaints, eight describe a car that sped up or lunged (two of them in reverse), the opposite of reduced power; the others describe a stall, a power loss or other trouble. This count is ours, not NHTSA's.

The papers describe two different things. Reduced power: Ford says "the power steering, power braking, lighting, and climate control systems remain fully functional." (16B32). A stall: GM's notice for the 2017-2018 Colorado and Canyon lists a vehicle that "stalled and not able to restart.", and NHTSA's summary of Nissan's recall says broken gears can cause "a loss of drive power, increasing the risk of a crash." Nissan's report gives its October 2025 reasoning, before the recall: "A loss of motive power can occur only when the vehicle is stationary (0 mph).", and its form lists the advisories "Do Not Drive" and "Park Outside" with neither box checked on the page we read. No paper tells an owner to tow. That is why our rule is stricter: the danger is the stall in a lane, the first seconds of reduced power on a highway, and a restart that works once and fails the next time.

Is a stall the usual ending of a P2101 code, and does replacing the throttle body stop it? Not usually, and not always. PulsCar's count of 2,726 owner complaints about throttle-control events: 673 describe a stall (25%) and 2,203 reduced power or limp mode (81%); 141 of the 818 with a throttle body named or replaced say the problem came back, so a new part is no guarantee. Only 28 name P2101 or P2008, and 5 of those describe a stall, so the code alone says little about whether the engine will cut out. If it does: hazard lights on, steer to a safe place with the momentum you have, and expect heavier steering and brakes (our advice). Reduced power, a stall or a flashing light: pull over safely, engine off, tow; the only exception is the one in the rule at the top.

What owners say they paid

229 figures in 210 of the 2,726 complaints are ones an owner tied to diagnosing or repairing the event: 57 amounts paid, 76 bills, 89 quotes and 7 not stated. They are what owners wrote, not audited invoices. We publish them with NHTSA complaint numbers, and the 201 candidate figures left out are listed with the reason. Group medians are in the ladder; the software, sensor and computer groups are too small to trust. All bills and amounts paid, every repair type: 133 figures, median $535.

Why the code comes back

The first fix did not hold: 141 of the 818 throttle-body complaints say the problem came back (a part failed again, a cleaning wore off, or the part was not the whole story). The cause is intermittent: "THEY CAN'T DIAGNOSE BECAUSE THE WRENCH LIGHT IS NOT ON RIGHT NOW." (ODI 10876292, 2010 Fusion.) GM says returned CT5 throttle bodies "have been tested and inspected with no trouble found." The maker has not found the cause: Stellantis writes "Engineering is investigating an issue for an intermittent P2100." (S2218000007). The fix came later: Ford's SSM 51827 said "Engineering is working on a solution that is expected in October 2023." and the reprogram bulletin 23-2364 followed on 30 November 2023.

Can you drive with P2101?

It depends on what the car does, and this is our advice, not a maker's rule. If the car drops into reduced power or limp mode, loses power in traffic, stalls, or the check engine light is flashing: pull over safely, switch the engine off and have it towed. The only exception, for a flashing light alone on a car that starts and runs normally, is a shop within 2 to 3 miles, reached gently, under 40 mph with light throttle (our advice); never for a car that will not start. Read the exception for what it is: a flashing light alone, with no loss of power at any point. If the car drops into reduced power on the way, you are back in the first case.

No maker paper we read tells an owner to stop or tow. Ford's SSM 51827 says a restart after 30 seconds removes the reduced-power condition on start-up, and Nissan's owner letter asks owners to book "as soon as possible". Our rule is stricter because a restart that works once is not a repair, and the risk is the engine that cuts out in a traffic lane or on a highway on-ramp. See also stalling while driving, a car that won't accelerate, hesitation, jerking and losing power uphill.

A steady light and a car that has never lost power (nothing has dropped, so the rule at the top is not triggered): this is not an emergency. Have the code read, book a shop within days, keep trips short and off highways and heavy traffic until then (our advice); any power loss moves you to the rule at the top. P2008 with no other symptom is the same case. GM's papers list a weak battery among the causes of throttle codes, so test a battery that struggles to start the car now: battery keeps dying.

Should you buy a used car with a P2101 history?

Ask what was found, not what was replaced. 141 of the 818 complaints that end at a throttle body say it came back, and so do 27 of the 126 that end at "checked and cleared". Ask for the invoice that names the test or the bulletin followed, have a dealer run the VIN (a 2024 or 2025 Rogue first), ask whether the software was updated, and look at the battery and the throttle's plug yourself. The used-car inspection checklist covers the rest.

Clearing P2101 before an inspection

Do not clear a code to pass: a cleared code returns if the cause is still there. The papers show what a clear is for: after a repair, Toyota says "Clear ANY DTCs and test-drive the vehicle to confirm the condition is no longer present.". Fix first, drive several normal trips, then test; how to reset a check engine light covers the mechanics.

Three P2101 traps

Trap 1 · Buying a throttle body from the code. Of the 25 families of papers counted on P2101, 2 end at a new throttle body (GM's gel notice for vehicles built before a set VIN, and Nissan's free recall when P2101 or P2119 is stored), and 141 of the 818 throttle-body complaints say it came back.

Trap 2 · Trusting a restart. Ford's message calls a 30-second restart a way to "continue to drive the vehicle", and GM's notice for the 2017-2018 Colorado and Canyon lists a car that "stalled and not able to restart." A restart that clears the reduced power once does not tell you what happens in a traffic lane.

Trap 3 · Paying for what a program owed you, or hoping for one that ended. 63 complaints name Ford's 13N03, 16B32, 16B23 or 17B28, and at least 20 say the program was refused or did not cover their car; Ford's 16B32, 16B23, 17B28 and 18B34-S1 ended between September 2017 and May 2019, and we could not find 13N03's terms. Ask for the VIN lookup before the repair, not after.

The P2101 plan: 10 minutes, today, this week

If the car drops into reduced power or limp mode, loses power in traffic, stalls, or the check engine light is flashing: pull over safely, switch the engine off and have it towed. The only exception, for a flashing light alone on a car that starts and runs normally, is a shop within 2 to 3 miles, reached gently, under 40 mph with light throttle (our advice); never for a car that will not start. Today (10 minutes). Note the weather and what changed first, test the battery, look at the throttle's plug and the air duct, and read every code with the freeze frame. Today (VIN). Ask a dealer for recalls, programs and software updates for this engine and code. This week. If it returns, pay for one diagnosis, name the bulletins you found, and ask for the test that points to the motor before any part.

These are composite scenarios, not individual customers; the dollar figures are shop-price ranges from our guides. A 2023 F-150 3.5L built from October 2022 shows P2101 on start-up with the wrench light, and a restart clears it: the owner asks for Ford 25-2320 (a reprogram, $0 to $200 outside warranty) before a throttle body at $300 to $800. A 2024 Rogue goes into reduced power and a shop offers a cleaning at $80 to $150: the owner runs the VIN for recall 26V-081 first. A four-cylinder 2015 Accord will not start and shows P2101: the owner has the battery tested and asks about Honda 19-034 before any throttle body.

Sources and documents

Primary documents only. Claims marked 🟢 rest on one of the items below; claims marked ⚪ are shop-price estimates carried from PulsCar's repair guides. Links checked October 2026; dates are given in the text where the paper prints one.

1. General Motors: PIP5501A, PIP5501B, 18-NA-037, 18-NA-037 v2, 2017 trucks notice, PIE0444, PIP5660, PIP5660B, PIP5756, 25-NA-002, PIP5424A, 17096, PIP4573B, PIP4578B, PIP5513, N242445290.
2. Ford: 16B32, 16B23, 17B28, 18B34-S1, SSM 51827, 23-2364, 25-2320, SSM 50203, 16-0163, 18-2062, SSM 46266, SSM 46085.
3. Chrysler, Jeep, Dodge, Ram (Stellantis): 09-003-20, 18-042-22 REV. B, 18-071-22 REV. A, 18-141-22 (Wrangler), 18-006-26, 09-023-23, S2218000003, S2218000007, tech tip 9001645, 18-100-16, S2308000109.
4. Toyota and Lexus: T-SB-0092-23, T-SB-0005-24, T-SB-0005-24 Rev2, T-SB-0043-20, T-SB-0012-16, T-SB-0103-12 Rev2, tech tip T-TT-0321-15, L-SB-0032-25.
5. Honda and Acura: 15-028, 19-034, 13-042, Acura 14-052, MDX request, AER13100E, 2023 RDX and TLX request, 2023-2024 hybrids request.
6. Nissan, Kia, Hyundai: Nissan NTB16-066, Nissan NTB25-005, Nissan NTB19-045a, Nissan California campaign, Infiniti California campaign, Kia SA514, Hyundai 21-EM-008H, Hyundai 19-FL-005H.
7. Mazda, Mitsubishi, Subaru: Mazda SSP94, Mazda SSP95, Mazda 01-001/18, Mazda 01-001/20, Mitsubishi TSB-13-13-005, Mitsubishi TSB-20-13-001, Subaru 09-102-23.
8. Mercedes-Benz, Volvo: Mercedes-Benz LI54.18-P-057927, Mercedes-Benz LI07.10-P-080384, Mercedes-Benz LI07.70-P-078078, Volvo TJ 34206.
9. NHTSA recall: 26V-081, Nissan Rogue, electronic throttle body gears (the Part 573 report, the dealer bulletins and the quarterly reports are filed under that number).

Data and sorting: complaints, amounts, figures left out, documents, complaints not sorted, the sorting rules and how we counted (CC BY 4.0).

Price guides: diagnostic cost, throttle body replacement, battery replacement and the P0441 guide for a reprogram.

What this page cannot tell you

The complaint file holds cases where an owner wrote to NHTSA, in the owner's words, with no check; owners whose trouble ended are mostly not in it, and a complaint is not a failure rate. The 3,251 are the complaints we sorted, not all of them (the unsorted remainder is described above). A further 55 about pedal and position-sensor codes were set aside for the P2138 page. Only 28 spell out P2101 or P2008. Four in five of all 2,726 describe a car of model years 2006 to 2016 (2,166), while many of the papers are about newer cars. Owner dollar figures are quotes and bills as written. A paper NHTSA's index does not list is not here, and neither is one the index lists without a file to read, Ford's 13N03 among them (what we could not read). A bulletin tells you what a maker told its dealers, not what is wrong with your car, and coverage statuses are our arithmetic from printed terms. A code read alone is not a diagnosis.

Neighbouring pages: P2138, P2135, throttle body replacement cost, P0505, a car that won't accelerate, stalling while driving and the check engine light.

Prices verified October 2026 in the repair guides they are carried from and in the owner reports above, and reviewed quarterly. Technical documents verified October 2026.

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).

Did the reduced power turn out to be software, ice, a plug, a battery or a throttle body? Email [email protected] with the vehicle, mileage and outcome.