Tire Pressure Light On? Steady vs Flashing, the Cold-Morning Rule, and 53 TPMS Recalls

A steady tire pressure light is not a glitch until proven otherwise. Federal standard FMVSS 138 sets the trigger: the light must come on within 20 minutes once a tire is 25 percent below the pressure printed on the door jamb placard. On a 35 psi placard that is about 26 psi, low enough to overheat the tire.

A flashing light is a different message. The same standard makes a combined lamp flash "for a period of at least 60 seconds but no longer than 90 seconds" when the monitoring system itself fails, then stay on. FCA's recall reports on 2022 Challengers put the danger plainly: a light lit by a dead sensor battery "could mask an actual low tire pressure condition."

By the end you will know which of five routes your light belongs to, what proves it, and what each fix costs, from free air to a $370 sensor. 🟢 marks claims resting on a document in Sources; ⚪ marks estimates and owner reports.

I built PulsCar after a $380 "full diagnostic" in Phuket in 2025 led to roughly $6,000 over six months across several shops, and the sound never went away (the story is on the About page).

Steady or flashing, one tire low or none

Each route is defined by how the light behaves and what the gauge says: steady or flashing, one tire low or none.

One rule overrides everything: a gauge beats the dashboard, and the door jamb beats the tire. The sidewall number is the tire's maximum, not your target. Until all four tires are measured cold against the placard, you cannot tell a tire problem from a system problem.

First: what exactly is the light doing?

FMVSS 138 allows either a separate lamp reading TPMS for faults, or one lamp that does both jobs. On the shared lamp, steady means low pressure and flashing then steady means malfunction.

The 10-minute gas station protocol

1. Restart and watch the lamp for 90 seconds. Steady is a pressure warning. Flashing then steady is a system fault: Route 3.
2. Walk around the car before touching air. A tire visibly lower than the others, a nail head, a bulge or cords showing: Route 2 or Route 5.
3. Read the placard on the driver's door jamb. Front and rear numbers can differ. Ignore the sidewall maximum.
4. Measure all four tires with a gauge. Tires count as cold after 3 hours parked or less than a mile driven, per Honda and Nissan; a hot tire reads 3 to 5 psi high, per Nissan.
5. Fill each tire to the placard, never below it. If you are measuring warm tires, do not let air out to reach the number.
6. Drive a few minutes above 16 mph. Direct sensors need movement to report. If yours is an indirect system, start a calibration first: Route 4.
7. Measure again tomorrow morning. One tire lower again is a leak: Route 2. All four fine and the light back is Route 3 or 4.

What a diagnostic should cost covers what a shop adds.

Direct or indirect: which system do you have?

Direct systems put a battery-powered sensor inside each wheel, usually behind the valve stem, radioing to "typically, the same receiver that performs the keyless entry function," in GM's words. That is why key fob and remote start faults appear in these bulletins.

Indirect systems have no sensors in the tires. Honda's job aid says its system, "first introduced in the 2013 Accord," calculates pressure from the wheel speed sensors, steering angle, brake pressure and outside temperature, comparing how fast each tire turns; when all four drop together it looks for a change in tire resonance. Mazda's 02-011/18 describes the same idea on 2013-2016 CX-5, 2014-2018 Mazda3 and others.

How to tell. On Hondas, the job aid says indirect systems have "black rubber valve stems" and direct systems "gray alloy valve stems." That shortcut is Honda's; other makers fit rubber stems to direct sensors too. The owner's manual, a TPMS button or calibration menu, or a display of each tire's psi settles it.

Why it matters. A direct system reads pressure and usually resets itself. An indirect system learns what normal looks like, so it must be told when tires change.

Eight TPMS light situations, and which is yours

"First cold morning of the season, light on, gone by lunch." → Route 1.

"The same tire is low every few days." → Route 2. Puncture, valve stem or wheel rim.

"It flashes when I start the car, then stays on." → Route 3.

"Pressures are perfect and the light keeps coming back." → Route 4, especially on 2013-2017 Hondas.

"Right after new tires, a rotation or winter wheels." → Route 4, or Route 3 if it flashes.

"I put the spare on and now it flashes." → Route 3. Many spares have no sensor.

"Light came on, then the car started pulling or thumping." → Route 5, now. The pulling guide covers pulls without a light.

"2022 Charger, Challenger or 300, or a 2024-2026 Grand Cherokee." → Route 3 and a VIN check.

What actually determines a TPMS light number

Air or electronics. Air is free or nearly so; a sensor is the priciest common part.

Where the air is escaping. A tread puncture is a patch, a corroded bead seat is labor, a sidewall injury is a new tire.

Direct or indirect. Indirect systems have no sensors to buy, but need a correct calibration after every tire change.

Your VIN. Several sensor and software faults are recalls, repaired free.

Who changes your tires. Nissan and Stellantis both name sensors broken during tire changes; Nissan's warranty excludes that damage.

Timing. GM designs sensors for 10 years or 150,000 miles, and Consumer Reports' expert notes a sensor is cheaper to replace while the tire is already off.

The TPMS light price ladder, from the bottom up

Read it from the bottom up: the last two lines can be the same part, separated by a VIN, and the first line fixes more lights than all the others together.

The TPMS light number, by what you drive

Two rows invert the guide. On the Jeep and Tesla recall models the danger is a light that stays dark or goes dark, so a quiet dashboard proves nothing. On the Volkswagen and Audi models the gap, found in rare test runs, was all four tires losing air at the same rate; VW says drivers are still warned before pressure becomes safety-relevant.

Which TPMS light route is yours? Answer five questions

1. Did it appear with cold weather, and are all four tires a few psi low? → Route 1.

2. Is one tire lower than the others, again and again? → Route 2.

3. Does the lamp flash for about a minute after start? → Route 3.

4. Are all four at the placard and the light still on or returning? → Route 4.

5. Is there a pull, thump, flapping, vibration or visible damage? → Route 5. Check this first.

The five TPMS light routes, cheapest first

Route 1 · The cold-morning light — temperature, slow natural loss and the right number

The tell. First cold snap, steady light at the morning start, gone after a few miles. All four tires read a few psi low when cold.

What it actually is. Physics plus neglect. GM's 07-03-16-004E: "tire pressure will change about 7 kPa (1 psi) for every 6°C (10°F) decrease in temperature." Nissan's NTB13-088a puts it at about 0.8 psi and adds that tires "naturally decrease by approximately 1.0 - 1.5 psi per month", so after 6 to 8 months the light can come on by itself. FCA's recall 24V-474 on 2014-2019 Fiat 500s shows the threshold arithmetic: a 38 psi placard means the light "should come on when the tire pressure drops to 28.5 PSI." Toyota's T-SB-0017-14 works an example: a 54°F gap between a warm workshop and a 14°F outdoor low moves cold tires by about 4.9 psi. GM names the pattern exactly: a cold tire can sit at the warning point, then "rise in temperature and pressure as the customer drives, causing the message and light to go out."

The cheap cause that gets skipped. Where you checked. A tire filled in a heated garage or right after a highway drive reads correct and then sinks overnight. GM's instruction: "Never set the tire pressure below the placard value regardless of tire temperature or ambient temperature." When filling indoors on an extremely cold day, GM allows 3 to 4 psi above the placard, then a re-check outdoors when cold.

Fix it yourself — set pressures the way the bulletins do. Check before driving, or after 3 hours parked, with a gauge rather than the air machine's dial. Fill to the placard, front and rear separately, and check the spare: the owner's manual text FMVSS 138 requires says each tire "including the spare (if provided), should be checked monthly when cold." Filling warm tires? Add air to the placard, never bleed them down, and re-check next morning. The honest limit: if one tire is consistently lower than the rest, temperature is not your story; go to Route 2.

Where this does not apply. A flashing lamp is Route 3, whatever the weather.

At the shop — say this: "Set all four to the door placard, cold, and tell me each reading before you added air. If one tire was much lower than the others, dunk-test it for a leak."

How much does tire pressure drop in cold weather, and is that enough to turn the light on? Enough, and more often than drivers expect. GM's bulletin 07-03-16-004E gives about 1 psi for every 10 degrees Fahrenheit, and Nissan's NTB13-088a about 0.8 psi. A tire set to a 35 psi placard on a 75 degree afternoon can read 31 to 32 psi at 35 degrees next morning. Add the 1 to 1.5 psi a month that Nissan says tires lose naturally, and a tire last checked in spring can sit near the FMVSS 138 warning point of about 26 psi. Driving warms it by 3 to 5 psi, so the light goes out and the problem stays. The fix is air, set cold, never below the placard. PulsCar's free sound check can't hear a hum, a thump or a click that only happens on the road; a tire rotation and a lift check sort those.

Route 2 · One tire keeps losing air — punctures, valve stems and wheel rims

The tell. The same corner is low every few days or weeks, and the light returns after every top-up.

What it actually is. Air leaves by one of four paths. The tread: a nail or screw. The valve: Infiniti's ITB20-003 covers 2014-2020 Q50 and 2017-2020 Q60 models built before 26 December 2019 whose sensor seals leak "approximatively 1 psi every 3 days"; Ford's SSM 47992 offers a stem kit without the sensor for 2017-2019 F-Super Duty. Nissan: "Do Not replace the TPMS/LTPWS sensor assembly for a leak." The rim: GM's 08-03-10-006I, for 2026 and prior GM cars and light trucks, traces a tire that "slowly loses air pressure over a period of days or weeks" to aluminum bead seat corrosion that "will not be visible until the tire is dismounted." The tire: BMW's SIB 36 02 24 replaced rear tires on X3s built 8 to 29 July 2024 whose inner liner could detach.

The cheap cause that gets skipped. The rim. GM tells technicians "DO NOT replace a wheel for slow air loss" before trying the cleanup: sand the corrosion, coat the seat with bead sealer, remount, 0.6 hours a wheel, for up to 4 inches of corrosion under 20,000 miles and 8 inches above. One 2008 Lincoln MKZ owner wrote: "I set tire pressure and within 2 days the tire pressure warning light comes on," with the mechanic blaming corroded chrome at the bead (ODI 10947313).

Fix it yourself — the soapy water test. Inflate the low tire to the placard. Spray soapy water on the valve core, the joint where the stem meets the wheel, the rim edge all the way round and the tread, rolling the car to reach it all. Growing bubbles mark the leak; Infiniti's bulletin uses this test at the valve nut. The honest limit: a bead leak needs the tire dismounted, a repair near the sidewall is not a repair, and Nissan's NTB10-114d warns that lock-on air chucks and heavy hoses can snap a sensor stem.

Where this does not apply. All four tires equally low is Route 1; a bulge or cords is Route 5.

At the shop — say this: "This tire loses pressure every few days. Dunk-test the whole assembly and show me the bubbles. If it is the bead, clean and seal the seat as GM's bulletin 08-03-10-006I describes before selling me a wheel, and if it is the valve, replace the seal before the sensor."

Free, no card, no subscription: record 30 seconds of the engine running with the car parked, and PulsCar emails a report with a likely cause and severity, or says inconclusive. A hum, a click or a thump that only appears at speed is a tire or a wheel bearing, and a recording from a standstill cannot contain it: rotate the tires and see whether the thump moves with the wheel, and have a shop spin each wheel on a lift for the bearing.

Route 3 · The light flashes, then stays on — sensors, batteries, receivers and recalls

The tell. At every start the lamp flashes for about a minute, then burns steady, sometimes with a service message or dashes.

What it actually is. The warning FMVSS 138 reserves for a malfunction. GM's 07-03-16-004E: if a sensor "does not transmit information for 18 minutes of driving," the system sets a code and blinks "for about a minute, after which the light will stay on solid." Stellantis puts it in one line: "A flashing Tire Pressure Lamp is a sign that the vehicle has set a Diagnostic Trouble Code."

Batteries and recalls. GM designs its sensors to last "10 years or 240,000 kilometers (150,000 miles)." Some fail far sooner. FCA's recalls 22V-504 and 22V-808 cover 2022 Challenger, Charger and 300 models built with a sensor that "prematurely discharges its battery"; the second came after six inspected sensors still failed. Tesla's campaign bulletin SB-25-34-003 replaces sensors on some 2025 Model 3 and 2026 Model Y cars whose battery "may drain at an accelerated rate." Subaru's 05-85-21R redesigned 2015-2021 valve assemblies because moisture can damage the sensor.

Receivers and software. Jeep's 26V-559, filed 1 September 2026, covers 201,976 2024-2026 Grand Cherokee, Wagoneer, Grand Wagoneer and related models whose radio hub software can lose reference pressures; possible signs are a service message, the engine light or dashes, but "None prior to failure." Recall 25V-527 covers 22,906 2024-2025 Wranglers with remote start where a pinched antenna cable blinds the system. Tesla's 24V-935 covers 696,281 cars whose fault lamp "does not persist between drive cycles," fixed over the air.

The cheap cause that gets skipped. Interference and the spare. Nissan's NTB13-088a names cell phone chargers and aftermarket DVD players; Stellantis's S2422000001 Rev. D adds toll transponders, CB radios, inverters, Wi-Fi hotspots, window tint ("most contain metal"), non-factory valve stem caps and new tires that may be steel reinforced. GM's PIT6188 says 2024 Traverse and Acadia front sensors that will not relearn can be OnStar interference: "Do not replace any TPM sensors." And a spare without a sensor sets the flash by design; GM's program 29110 added missing spare sensors to some 2014-2016 Silverado and Sierra trucks.

Where this does not apply. A lamp that is steady from the first second is Route 1, 2 or 4.

At the shop — say this: "The light flashes then stays on. Scan the TPMS module and tell me which sensor position has no signal, check the VIN for recalls, and ask me to unplug chargers and accessories before you quote a sensor. Replace only the failed sensor, not the set."

Flashing is a different warning from a steady light. FMVSS 138 allows one lamp to cover both low pressure and system faults, and when it does, a fault must make the lamp flash for 60 to 90 seconds after the ignition is switched on and then stay lit, repeating at every start until repaired. GM's bulletin 07-03-16-004E says a sensor silent for 18 minutes of driving triggers it. The causes are electronic: a sensor battery at the end of its life, a sensor broken during a tire change, a spare without a sensor, radio interference from a phone charger or dash camera, or a receiver fault like the software in Jeep recall 26V-559. Air will not clear it, and while it flashes the system may miss a genuine leak, so a weekly gauge check matters more, not less. PulsCar's free sound check hears the parked engine, not a tire starting to thump; a rotation tells you whether a thump moves with the wheel.

Route 4 · Pressures are right and the light stays on — indirect systems, calibration and relearns

The tell. A steady light, four tires at the placard on a good gauge, often right after tire service. Common on Hondas.

What it actually is: an indirect system that was not told. Honda's job aid says calibration must be started "anytime" you adjust pressure, rotate or replace tires; otherwise "the tire pressure calculations are tricked." Calibrate without correcting the pressure and "calibration comparison logic" makes the indicator come on "again within 20 minutes"; Mazda's 02-011/18 calls it "Misuse Prevention Logic." Honda also issued software: 14-042 for 2014 Civics, whose system "misinterprets different driving conditions," 14-006 for 2014 CR-Vs and 14-065 for some 2015 CR-Vs. One 2014 CR-V owner reported that after the update, false warnings fell from three or four a month to three or four a year (ODI 11006053).

New tires that roll differently. Honda's A18030D for 2014-2016 CR-V explains that three approved versions of the same original tire differ in sidewall construction and weight, and "because of the way indirect TPMS works, those differences will cause the Low Tire Pressure/TPMS indicator to come on." The job aid adds that one new tire with deeper tread than the others can do the same.

Direct systems that were not relearned. GM PI1385: "The TPM sensors must always be re-learned when accessory wheels are installed on the vehicle." GM's 07-03-16-004E adds rotations on vehicles with different front and rear placard pressures.

The cheap cause that gets skipped. The numbers stored in the car. GM says placard values live in the receiver and "CAN be revised" by a dealer when different tires are fitted. Mercedes-Benz's LI40.15-P-079038 for GLC models (series 254) traces a red "Check Tire" warning with correct pressures to excessively high stored minimum values, fixed by recommissioning the control unit.

Fix it yourself — calibrate a Honda or Mazda indirect system. Set all four tires cold to the placard, all the same type and size, car stopped, ignition on. On 2013-2017 Accord (except Touring), 2014-2016 CR-V (except Touring), 2015-2017 Fit and 2016-2017 HR-V, Honda's job aid says to press and hold the TPMS button under the left side of the dashboard until the indicator blinks twice; on Display Audio models, select Home, Settings, Vehicle, TPMS Calibration, Calibrate. On the Mazdas in 02-011/18, hold the TPMS set switch until the light flashes twice and the beep sounds once. Then drive normally; Mazda says learning takes about 20 minutes and pauses while braking or turning. The honest limit: direct sensors that need relearning usually need a scan tool, and a light that returns after a correct calibration needs a dealer check for software.

Where this does not apply. If the lamp flashed first, go to Route 3.

At the shop — say this: "All four are at the placard. Is this an indirect system, and was it calibrated after the last tire service? If it has sensors, show me each sensor's reading and ID on your tool, relearn the positions, and check for software bulletins like Honda 14-042 before replacing parts."

Route 5 · The light with a pull, a thump or a vibration — the tire may be failing

The tell. The light arrives with a thump, flapping, a roar, a shake or a pull.

What it actually is. A tire losing air fast, or coming apart. The owner's manual statement FMVSS 138 requires reads: "Driving on a significantly under-inflated tire causes the tire to overheat and can lead to tire failure." Owners describe how short the margin is. A 2023 Mazda CX-9 owner: "other than the tire pressure light coming on 30 seconds before the failure, there was no warning" before the tread ripped away (ODI 11679527). A 2018 Audi Q5 owner: "We kept driving, not knowing it was a screw," until "the entire tread of the tire came off" (ODI 11421673). A 2015 Traverse driver at 80 mph saw the indicator, then felt the rear drop as the tire blew (ODI 10993400).

Why the light cannot save you from a blowout. The standard gives the system up to 20 minutes to warn. A 2022 Civic owner whose tire came apart on the freeway wrote: "Zero warning lights or tire pressure lights appeared on my dash until after I installed my spare tire" (ODI 11513150). A sudden failure can beat any monitor.

The cheap cause that gets skipped. The can of sealant. GM's bulletin says sensors are "not compatible with commercially-available tire sealants," which can clog the port and cause false readings; Nissan says sealants can damage sensors. Use the spare or the maker's own inflator kit, which GM says its sensors tolerate, and tell the shop.

Where this does not apply. A steady hum that rises with speed and changes when you steer, with no pressure loss, is usually a wheel bearing; the bearing cost guide covers it. A shake only at highway speed with good pressures is often balance; see shaking at highway speed.

At the shop — say this: "The light came on with a thump and a pull. Inspect the tire inside and out for separation, bulges and cords, check the wheel for damage, and tell me whether the sensor survived before you mount a new tire."

What does it cost to fix a tire pressure light in 2026, from cheapest to most expensive? Most lights cost nothing but air, which is free at Les Schwab and about $1.50 to $5 at a coin machine. Calibrating an indirect Honda or Mazda system is a button press. A puncture repair is $15 at Walmart for non-members and averages $54 to $64 on Kelley Blue Book's estimator. A leaking valve seal or a corroded bead seat is mostly labor; GM allows 0.6 hours per wheel for the bead cleanup. At the top, a sensor is $45 to $65 as a part but averages $314 to $368 installed, and Consumer Reports members paid $212 per new tire. Recalls change the math: FCA replaced suspect sensors on 2022 Challenger, Charger and 300 models, and Jeep's 26V-559 reprograms 201,976 vehicles free. All prices are estimates. PulsCar's free sound check hears the parked engine, not tires; the gauge and a rotation pick the right part.

Resetting the light: what the documents actually say

Direct systems. Fix the pressure and drive. GM: "It is not necessary to relearn the sensors after correcting the pressure." Nissan says to drive above 16 mph; after a battery disconnect, GM says dashes clear after 2 minutes above 20 mph. Relearns are for rotations, new sensors and new wheels, usually with a tool.

Indirect systems. Calibrate after every pressure change, rotation or tire replacement, with the button or menu your manual names.

What never works. A reset without air on an indirect system, and a reset of any kind for a flashing lamp.

Other makes. We found no document giving a universal reset button, so we do not invent one: follow the TPMS section of your owner's manual.

Hearing it: four tire sounds and what they mean

Rhythmic thump or slap once per wheel turn, faster with speed. A tread separating, a bulge or a flat spot: Route 5, stop.

Click or tick once per wheel turn, loudest at low speed. Often a nail or stone in the tread; check the tread before the air leaks out, Route 2.

Roar or flapping with a pull. A tire running low or flat: Route 5.

Hum or growl that rises with speed and changes when steering. Usually a wheel bearing or cupped tread, not pressure; the humming noise guide separates them.

These are general shop experience ⚪, not manufacturer documents; in our sample 111 tire light complaints mention a noise. Our study of noises without a warning light shows how often the sound comes first.

What 53 tire pressure recalls reveal

Owner complaints and forum threads are full of tire pressure lights that come on for no reason. The federal recall file tells a different story about where the real risk sits, and it is structured enough to count properly.

We took NHTSA's public recall file on 17 September 2026 and pulled every campaign since 2010 whose component is the tire pressure monitoring system, that cites FMVSS 138, or whose defect text mentions a tire pressure warning. We removed trailers, motorhomes, buses and heavy-truck chassis, read all 53 remaining recalls on cars, SUVs, pickups and vans, and classified each by what could go wrong, why, and how it was fixed.

Finding 1: the recalled failure is silence. In 51 of 53 recalls the stated risk is that the driver may not get a correct low-pressure warning. Even the three campaigns about a light that stays on despite correct pressures, Land Rover 14V-618 and Chrysler 14V-632 and 14V-633, were recalled because a constantly lit lamp "could mask an actual low tire pressure condition." No recall in the file was issued for a light that merely comes on too often.

Finding 2: most of it is software. 41 of the 53 were fixed with a software update, recalibration or configuration change, covering 95 percent of the recalled vehicles. Tesla 24V-935 fixed 696,281 cars whose warning "may not remain illuminated between drive cycles" over the air. Volkswagen and Audi 22V-815 updated 296,044 cars whose system might not catch all four tires deflating together. Jeep 26V-559, filed 1 September 2026, updates the radio hub software on 201,976 2024-2026 Grand Cherokee, Wagoneer and related models.

Finding 3: the problem is growing, not shrinking. Campaigns filed from 2022 to September 2026 account for 19 of the 53 recalls but 2,169,485 vehicles, 89 percent of the total. Five of those are instrument panels that can start up without warning lights, including Toyota and Lexus 25V-595 on 591,377 vehicles and Kia 23V-298 on 108,936, where a blank display takes the tire warning with it.

Finding 4: sensor batteries are the rare case. Only two recalls, both on 2022 Dodge Challenger, Charger and Chrysler 300 models, blame sensor batteries: 22V-504 on 52,340 vehicles and 22V-808 on 44,212. Nine more trace to vehicles set up wrong at the factory or before sale, such as Nissan 12V-068, where the system "was not activated" during assembly, and Toyota 11V-148, where accessory wheels fitted before sale were not recalibrated.

Why does it matter that tire pressure recalls are about lights that stay dark? Because a quiet dashboard is the state drivers trust most, and it is the one manufacturers have had to recall. In the 53 recalls on passenger vehicles since 2010 that PulsCar classified, 51 carried the risk that the driver might not get a correct warning, and none was issued because a light came on too often. The practical rule follows directly. Check tire pressure with a gauge once a month and before long trips, whatever the dashboard shows, as the owner's manual text FMVSS 138 requires. Run your VIN at nhtsa.gov/recalls, because 41 of these fixes were free software updates that only reach cars that come in or connect. And treat a light that has been on for weeks as no warning at all: while it is lit, it cannot tell you about a second tire going down.

Five lessons hidden in the recall remedies

The recall texts are more useful than the counts. Read together, they describe five situations where a working-looking system does not protect you, and each has a simple check.

1. All four tires losing air together. Indirect systems compare how fast each wheel turns, so four tires deflating at the same rate look normal. Mazda's 14V-675 covers 2014-2015 Mazda6 cars built from 25 October 2012 to 10 October 2014 where, "if the pressures of four of the tires on an affected vehicle gradually drop at the same time," the system "may not warn the driver." Volkswagen and Audi's 22V-815 says the same about deflation "among all four tires simultaneously" on 296,044 vehicles. That is exactly what months of slow natural loss and a cold snap produce. Check: a gauge on all four tires once a month, even with a dark dashboard.

2. Wheels changed before you bought the car. Toyota's 11V-148 covers 22,000 FJ Cruiser, Land Cruiser, Tacoma, Sequoia and Tundra trucks whose factory wheels were swapped for accessory wheels and LT tires "prior to first sale" without recalibrating the system. Volkswagen's 11V-312 found CCs whose wheels were replaced at the port with ones "not equipped with the proper TPMS sensors," and Cadillac's 19V-731 found dealer-installed 20-inch accessory wheels on the 2020 CT6 with sensors on "the incorrect wireless radio frequency." Check: on a new or used car with non-standard wheels, ask the seller to show all four sensor readings on a tool.

3. A threshold set a few psi too low. FMVSS 138 fixes the warning at 25 percent below placard. Chrysler's 12V-004 found 2012 Charger SRT8 and 300 SRT8 cars that warned at 22 psi "rather than the required 24 psi." GM's 11V-511 found 2012 Equinox and Terrain models that waited until pressure was "more than 25%" low, and 18V-509 found 2018 Express and Savana vans warning at 37 psi instead of 41. A few psi sounds small; on a loaded van it is the margin before a tire overheats. Check: know your placard number and never treat the light as the gauge.

4. The warning shares hardware with something else. Ford's 20V-635 replaced the body control module on 2020 Escapes with key-start ignition because it "intermittently may not pick up the signal from the rear" sensors or the key fob, and owners had to bring two key fobs. Jeep's 25V-527 traces a dark warning on 2024-2025 Wranglers to a pinched remote start antenna cable. GM's own bulletin notes the tire sensors usually talk to the same receiver as keyless entry. Check: if key fob range or remote start acts up at the same time as tire warnings, say so at the shop.

5. A light that is always on is no warning. Land Rover's 14V-618 and Chrysler's 14V-632 and 14V-633 describe systems that failed to learn sensor positions, so the lamp stayed on with correct pressures, and a later leak "would not be notified." Volkswagen's 11V-312 made the same point about wrong sensors: drivers "will receive a constant warning," but the system "cannot determine if the vehicle tires are properly inflated." Volkswagen's 21V-274 on the 2021 Arteon adds the rotation case: the system may "misidentify a tire with low air pressure." Check: do not live with a steady light for weeks; until it is fixed, you are the tire pressure monitor.

Every one of these remedies was free under the recall. That is why a VIN check at nhtsa.gov/recalls belongs before any paid sensor replacement, and why it is worth repeating after you buy a used car: several of these campaigns were filed years after the vehicles were sold.

Can you delete or disable the tire pressure light? And buying used

Disabling. Federal law, 49 USC 30122, says a manufacturer, distributor, dealer, rental company or repair business "may not knowingly make inoperative" equipment installed to meet a safety standard, and FMVSS 138 is one. GM's FAQ answers the question directly: the system "cannot knowingly be disabled by an OEM nor an aftermarket service provider." One 2011 Odyssey owner says a dealer told him to "put black tape over the lights so they don't bother me"; his update says another shop found and fixed a faulty sensor (ODI 10743362). Tape hides the warning, not the fault.

Buying used. A lit tire lamp is a price conversation: run the VIN, note whether it flashes or stays steady, and ask to see sensor readings on a tool. A steady light with good pressures on a 2013-2017 Honda may be a calibration; a flashing light on a 10-year-old car may mean several sensors at about $314 to $368 each on estimators ⚪.

What a shop actually does with a TPMS light, checkpoint by checkpoint

Checkpoint 1 — the readings. "What was each tire's cold pressure before you added air?"

Checkpoint 2 — the system type. "Is this direct or indirect, and does it need calibration or a relearn after today's work?"

Checkpoint 3 — the leak. "Where exactly were the bubbles: tread, valve, bead or tire body?"

Checkpoint 4 — the sensor data. "Which position has no signal or a low battery warning on your tool?"

Checkpoint 5 — the ceiling. "Is it covered by a recall, and will you call before replacing more than one sensor?" The overcharging guide covers how quotes grow.

Three TPMS light traps that cost owners the most

Trap 1: four sensors for one leak. The situation: a 2016 Silverado on aluminum wheels, one tire low every week, steady light. What the shop says: "Your sensors are 10 years old. Let's do all four." What is really happening: a steady light means low pressure, not a sensor fault, and GM's 08-03-10-006I describes weekly loss from bead seat corrosion that cannot be seen with the tire mounted. Price versus bill: about 0.6 hours of bead cleanup, against four sensors at estimator averages of $314 to $368 each. Your protective question: "If the sensors were failing, why is the light steady and not flashing, and where did the dunk test bubble?"

Trap 2: the Honda that needed a button. The situation: a 2015 CR-V EX, fresh rotation, steady light, all four tires at 33 psi. What the shop says: "Could be the ABS system. Diagnostic is an hour." What is really happening: Honda's job aid requires calibration after every rotation; the 2014-2016 CR-V uses the TPMS button, and calibration without a pressure change is what makes the light return within 20 minutes. Price versus bill: a free button press and a drive, against an hour's diagnostic. Your protective question: "Was TPMS calibration started after the rotation, and what does the initialized odometer reading show?"

Trap 3: the sensor that was not the problem. The situation: a 2021 Ram 1500 with a light that flashes only when a dash camera and a phone charger are plugged in. What the shop says: "Left rear sensor has no signal. $350." What is really happening: Stellantis's S2422000001 Rev. D tells technicians to look for aftermarket devices that interfere around 433 MHz before replacing parts, and Nissan's bulletin names phone chargers. The reverse happens too: one Odyssey owner was told his fault was interference, and another shop found a bad sensor (ODI 10743362). Price versus bill: unplugging two accessories, against a $350 sensor that fixes nothing. Your protective question: "Does the signal come back with every aftermarket device unplugged?"

Three TPMS light quotes, decoded

These are composite scenarios, not individual customers — typical of the pattern each describes, assembled so the arithmetic is visible. We do not publish invented testimonials.

Scenario 1 — the October morning. A 2017 Camry's light comes on at 38°F and goes out on the way to work. A quick-lube offers a $120 TPMS diagnostic. The owner checks cold tires instead: 26 to 27 psi on a 35 psi placard, last filled in April. Air costs $2. Lesson: when the light goes out as the car warms up, the tires are telling the truth about the morning.

Scenario 2 — the second nail. A 2019 Equinox loses a tire's air twice in a month. The first shop plugged a nail for $25; the leak continues. A second shop dunk-tests the wheel, finds bubbles at the bead, and cleans and seals it for about $60. Lesson: a leak that survives a repair is usually a second leak, not a bad repair.

Scenario 3 — the spare. A 2014 Sierra owner fits the full-size spare, and at every start the light flashes then stays on. A sensor is quoted at $340. A VIN check shows GM program 29110 for spares built without sensors, closed in 2018, so the owner pays, but for the right part. Lesson: a flashing light right after a wheel change is the missing sensor, not a new fault.

Four TPMS light playbooks for where you are right now

"Steady light, car feels normal." Slow down, get to air today, measure all four cold, fill to the placard, re-check tomorrow.

"Flashing, then steady." Check all four with a gauge now and weekly until fixed, unplug accessories, run the VIN, book a sensor scan.

"Pull, thump, flapping or vibration." Signal, get off the road, fit the spare or call roadside assistance. Do not drive on to the next exit.

"Pressures are right and the light keeps returning." Calibrate if indirect, ask for a relearn if direct, and ask about software bulletins. The dispute guide covers a bill already paid.

After the TPMS light fix: verify, then prevent

Verify with two starts. Switch off and on and watch the first minute: no flash, no steady light. Next morning, measure the repaired tire cold against the others.

Check monthly, and at the first cold snap. FMVSS 138's manual text says monthly, when cold, spare included. Nissan's 1 to 1.5 psi a month means a tire ignored for a season is already near the line.

Skip the nitrogen upsell if you like. GM's FAQ says sensors work with nitrogen, and "normal air is already 78% nitrogen."

Protect the sensors. Ask for tire changers that handle low-profile and run-flat tires, as Nissan's NTB15-060a describes, avoid heavy lock-on air chucks, and use metal caps only if the maker allows them.

Record a baseline. Thirty seconds at a steady 40 mph, saved now, makes the next thump a comparison. The recording guide has the method.

The TPMS light plan: 10 minutes, today, this week

Next 10 minutes — free:

1. Restart and watch whether the lamp flashes or stays steady.
2. Walk around the car for a low tire, nail, bulge or damage.
3. Any pull, thump or flapping: pull over and use the spare.

Today:

4. Measure all four tires cold against the door placard and fill them.
5. Calibrate if your car uses an indirect system.
6. Run the VIN at nhtsa.gov/recalls.

This week:

7. Re-measure; one tire low again means a dunk test.
8. A flashing lamp means a sensor scan before any part.
9. Run a free sound check if a noise came with the light.

Method and data behind the TPMS light numbers

Recalls. NHTSA's recall flat file FLAT_RCL_POST_2010, downloaded September 2026. Included: vehicle campaigns whose component is Tires: pressure monitoring and regulating systems, that cite FMVSS 138, or whose defect description mentions a tire pressure monitoring system or warning. Excluded: 10 campaigns on trailers, motorhomes, buses and heavy-truck chassis. Vehicle counts are the potentially affected population in the manufacturer's report. We read each defect, consequence and remedy text and assigned one outcome, one cause and one remedy type; the classification is published so anyone can disagree with a row.

Limits. A recall is filed when a manufacturer or NHTSA finds a safety defect or non-compliance. It does not measure how often ordinary sensors fail, and a failure that affects few vehicles or is fixed under warranty never appears. The absence of recalls for false alarms reflects how safety law treats them, not how common they are.

• All 53 recalls with outcome, cause, remedy and vehicle counts (CSV)

Sources and documents

Primary documents only, opened and read. 🟢 claims rest on an item below; ⚪ marks estimates and owner reports.

1. FMVSS 138, 49 CFR 571.138. Regulation
2. 49 USC 30122. Statute
3. NHTSA 26V-559 / FCA 54D Part 573, 1 September 2026. Part 573 (PDF)
4. NHTSA 22V-504 / FCA Z68, 14 July 2022. Part 573 (PDF)
5. NHTSA 22V-808 / FCA ZB5, 27 October 2022. Part 573 (PDF)
6. NHTSA 25V-527 / FCA 56C, 4 September 2025. Part 573 (PDF)
7. NHTSA 24V-935 / Tesla SB-24-00-018, amendment of 23 December 2024. Part 573 (PDF)
8. NHTSA 22V-815 / Volkswagen and Audi, 29 April 2024. Part 573 (PDF)
9. NHTSA 24V-474 / FCA 80B, 30 July 2024. Part 573 (PDF)
10. GM service bulletin 07-03-16-004E, February 2023. PDF
11. GM service bulletin 08-03-10-006I, March 2025. PDF
12. GM preliminary information PI1385, January 2015. PDF
13. GM preliminary information PIT6188, June 2024. PDF
14. GM program bulletin 29110, April 2016. PDF
15. Honda job aid 05074-07076 Version 2, July 2017. PDF
16. Honda service bulletin 14-042, revised 28 November 2014. PDF
17. Honda service bulletin 14-006, revised 17 December 2014. PDF
18. Honda service bulletin 14-065, 31 October 2014. PDF
19. Honda ServiceNews A18030D, September 2018. PDF
20. Mazda service bulletin 02-011/18, 8 May 2018. PDF
21. Nissan NTB13-088a, 15 September 2015. PDF
22. Nissan NTB10-114d, 9 March 2018. PDF
23. Nissan NTB15-060a, 12 February 2021. PDF
24. Infiniti ITB20-003, 10 February 2020. PDF
25. Toyota T-SB-0017-14, 5 March 2014. PDF
26. Stellantis STAR case S2408000002, January 2024. PDF
27. Stellantis STAR case S2422000001 Rev. D, July 2025. PDF
28. Tesla service bulletin SB-25-34-003, 12 December 2025. PDF
29. Subaru bulletin 05-85-21R, 27 April 2021. PDF
30. Ford SSM 47992, 2019. PDF
31. BMW SIB 36 02 24, 31 October 2024. PDF
32. Mercedes-Benz LI40.15-P-079038, 18 March 2025. PDF
33. Prices — Kelley Blue Book TPMS sensor estimator, Kelley Blue Book tire repair estimator, Les Schwab free services, Walmart flat repair, Consumer Reports on TPMS sensors, Consumer Reports tire survey, Family Handyman on air machines
34. NHTSA recall flat file FLAT_RCL_POST_2010 and our classification of 53 recalls. Field dictionary · CSV
35. NHTSA 25V-595, 23V-298, 14V-618, 14V-632, 14V-633, 12V-068, 11V-148 — defect, consequence and remedy text in the recall file.
36. Our complaint sample, pulled 16 September 2026. NHTSA file layout

What we looked for and did not find. A manufacturer document for a universal reset procedure, and a Honda document covering Accord or Civic years before 2013 as indirect systems: Honda's job aid dates indirect TPMS from the 2013 Accord.

Related: all dashboard warning lights, ABS light, check engine light, brake light, humming, pulling to one side, steering wheel shaking, alignment cost, strange noises, our story.

Prices verified: September 2026 · Technical documents verified: September 2026 · Reviewed quarterly

Had a tire pressure light diagnosed, or paid for sensors that did not fix it? Email [email protected] with the year, model, whether the light was steady or flashing, and what finally turned it off — owner data is how these ranges get sharper.