# Tire pressure light on? What it means and what to do **Verdict:** Drive to a shop this week - **Colour:** Amber - **Urgency:** This week - **Most common cause:** Cold weather dropped the pressure - **Can I reset it?:** Yes, once fixed ## Quick answer A steady tire pressure light means one or more tires is significantly underinflated, usually 25% or more below the pressure on the driver door sticker. Cold weather and slow leaks are the most common reasons. If the light flashes for about a minute and then stays on, the monitoring system itself has a fault, often a dead sensor battery. ## What does the tire pressure (TPMS) light mean? The tire pressure monitoring system, or TPMS, watches the air pressure in your tires. US federal rules have required it on new passenger cars and light trucks since the 2008 model year, and the light must come on when a tire falls about 25 percent below the pressure on the door sticker. Most cars use direct TPMS: a battery-powered sensor inside each wheel, often built into the valve stem, sends its reading to the car by radio. Some cars use indirect TPMS instead, which has no sensors in the tires. It watches the ABS wheel speed sensors and notices when a low tire, being slightly smaller, spins faster than the others; these systems usually need a reset after you set the pressures. In both types, a steady light means low pressure, while a light that flashes for about a minute at startup and then stays on means the system itself has a fault. ## What does the tire pressure (TPMS) light look like? Horseshoe-shaped tire cross-section with an exclamation mark in the middle; some cars show a car outline with the low tire highlighted. | If the light is... | It means | | --- | --- | | Steady | At least one tire is well below its recommended pressure. Check all four with a gauge and add air. | | Flashing | Flashing for 60 to 90 seconds at startup, then staying on, means the TPMS system has a fault, such as a dead sensor or one that was not relearned after a tire change. | ## Why is the tire pressure (TPMS) light on? 1. **Cold weather dropped the pressure** (most common). Tires lose about 1 psi for every 10 degrees Fahrenheit drop in air temperature, so a tire set in warm weather can fall below the warning point on the first cold morning of fall. The light may come on at startup and go out after a few miles as the tires warm up. Add air to the door-sticker pressure. 2. **Slow leak or puncture** (common). A nail or screw in the tread, a leaky valve stem, a corroded rim edge or a rim bent by a pothole lets air out over days or weeks. If one tire keeps going low after you fill it, have it inspected. Tread punctures can usually be patched, but sidewall or shoulder damage usually means a new tire. 3. **Dead TPMS sensor battery** (common). Each direct TPMS sensor has a sealed battery that typically lasts about 5 to 10 years and cannot be replaced on its own. When it dies, the light flashes at startup and then stays on, and that sensor must be replaced, about 50 to 150 dollars per wheel installed. Sensors fitted at the same time often fail close together. 4. **Sensors not relearned after tire work** (less common). After a tire rotation, new tires, new wheels or new sensors, some cars need a relearn procedure so the system knows which sensor sits on which wheel. Others, especially indirect systems, need a reset after pressures are set. Until it is done, the light may stay on or the car may show the wrong tire as low. ## What to do right now 1. Check all four tires (and the spare if your car monitors it) with a tire gauge when they are cold, before driving far. 2. Inflate each tire to the pressure on the sticker in the driver door jamb, not the maximum printed on the tire sidewall. 3. Drive for 10 to 20 minutes; the light should go out on its own once pressure is correct. 4. If one tire is noticeably lower, look for a nail or damage and have it repaired before it goes flat. 5. If the light flashes at startup and then stays on, have a shop scan the TPMS sensors. ## How do you reset the tire pressure (TPMS) light? On most cars the light turns off by itself after the tires are set to the correct pressure and you drive a few miles. Some cars have a TPMS reset button (often under the steering wheel or in the glovebox) or a reset menu in the dash settings; check the owner's manual. ## Is it safe to drive with the tire pressure (TPMS) light on? > **Drive to a shop this week.** You can drive carefully to the nearest air pump. If a tire looks visibly flat, the car pulls hard, or you hear flapping, stop and change to the spare or call for help, because driving on a very low tire can destroy it and cause a blowout. ## What to tell your mechanic Tell the shop whether the light is steady or flashes at startup, which tire keeps going low, and whether it started after cold weather, a rotation or new tires. Mention any curb or pothole strikes. They will check every tire's pressure, read each sensor with a TPMS tool to find a dead or missing one, and water-test a leaking tire to find the hole. ## How to keep the tire pressure (TPMS) light off - Check all four tires and the spare with a gauge once a month, when the tires are cold. - Add air in the fall as temperatures drop, rather than waiting for the light to come on. - Keep valve stem caps on, and ask for new sensor seals or service kits when tires are changed. - Have punctures repaired promptly by a tire shop rather than living with a slow leak. - Ask the shop to relearn the TPMS sensors after rotations or new tires if your car requires it. ## Tire pressure (TPMS) light by model Owner complaints to NHTSA that mention this light, by model. Each page shows complaints by model year and related recalls. - [Honda Accord](/warning-lights/tire-pressure/honda-accord): 154 complaints - [Honda CR-V](/warning-lights/tire-pressure/honda-cr-v): 146 complaints - [Honda Civic](/warning-lights/tire-pressure/honda-civic): 59 complaints - [Ford Escape](/warning-lights/tire-pressure/ford-escape): 36 complaints - [Ford Explorer](/warning-lights/tire-pressure/ford-explorer): 23 complaints - [Hyundai Sonata](/warning-lights/tire-pressure/hyundai-sonata): 23 complaints - [Chevrolet Equinox](/warning-lights/tire-pressure/chevrolet-equinox): 20 complaints - [Hyundai Elantra](/warning-lights/tire-pressure/hyundai-elantra): 20 complaints - [Honda HR-V](/warning-lights/tire-pressure/honda-hr-v): 18 complaints - [Jeep Grand Cherokee](/warning-lights/tire-pressure/jeep-grand-cherokee): 18 complaints - [Toyota RAV4](/warning-lights/tire-pressure/toyota-rav4): 17 complaints - [Ram 1500](/warning-lights/tire-pressure/ram-1500): 15 complaints - [Subaru Forester](/warning-lights/tire-pressure/subaru-forester): 15 complaints - [Volkswagen Tiguan](/warning-lights/tire-pressure/volkswagen-tiguan): 15 complaints - [Kia Sorento](/warning-lights/tire-pressure/kia-sorento): 14 complaints - [Subaru Outback](/warning-lights/tire-pressure/subaru-outback): 13 complaints - [Honda Pilot](/warning-lights/tire-pressure/honda-pilot): 12 complaints - [Hyundai Santa Fe](/warning-lights/tire-pressure/hyundai-santa-fe): 12 complaints - [Kia K5](/warning-lights/tire-pressure/kia-k5): 12 complaints - [Mazda CX-5](/warning-lights/tire-pressure/mazda-cx-5): 11 complaints - [Jeep Wrangler](/warning-lights/tire-pressure/jeep-wrangler): 10 complaints - [Toyota Camry](/warning-lights/tire-pressure/toyota-camry): 10 complaints - [Volkswagen Jetta](/warning-lights/tire-pressure/volkswagen-jetta): 9 complaints - [Tesla Model 3](/warning-lights/tire-pressure/tesla-model-3): 7 complaints - [Dodge Charger](/warning-lights/tire-pressure/dodge-charger): 5 complaints - [Jeep Cherokee](/warning-lights/tire-pressure/jeep-cherokee): 5 complaints ## Frequently asked questions ### Can I drive with the tire pressure light on? Yes, but only far enough to check and fill the tires. Low tires wear faster, hurt braking and handling, and can overheat and fail at highway speed. If a tire looks flat, the car pulls hard or you hear flapping, do not drive on it; change to the spare or call for help. ### Why is my tire pressure light on when the tires are fine? Usually because the tires are lower than they look, or the spare is low, so check all of them with a gauge rather than by eye. If pressures are correct and the light flashes at startup before staying on, a sensor has failed or needs to be relearned by a tire shop. ### Why does my tire pressure light come on when it is cold? Because cold air takes up less space, so tire pressure drops about 1 psi for every 10 degrees Fahrenheit. A tire that was borderline in warm weather can trigger the light on a cold morning. Add air to the door-sticker pressure while the tires are cold, not after a long drive. ### What PSI should my tires be? Use the pressure printed on the sticker inside the driver door jamb, which is usually 30 to 36 psi for passenger cars. The number on the tire sidewall is the maximum the tire can hold, not the recommended pressure. Some vehicles list different front and rear pressures, so check both. ### How do I reset the tire pressure light? On most cars, set all tires to the door-sticker pressure and drive for 10 to 20 minutes, and the light turns off by itself. Some cars have a TPMS reset button or a menu in the dash settings, and indirect systems usually need that reset. Check your owner's manual for the exact steps. ### What does a flashing tire pressure light mean? A flashing tire pressure light means the monitoring system has a fault, not just low air. It flashes for about 60 to 90 seconds at startup, then stays on. A dead sensor battery, a damaged sensor or a sensor not relearned after tire work are the usual causes, and a tire shop can scan them. ### How much does it cost to replace a TPMS sensor? Replacing one TPMS sensor usually costs about 50 to 150 dollars per wheel installed at an independent shop in 2026, including programming or relearn. Doing it while the tire is already off the wheel, such as during a tire replacement, can save some labor. The battery is sealed in, so the whole sensor is replaced. ### Why does my tire pressure light come on and then go off? Usually because a tire is right at the warning point, so the cold morning pressure triggers it and warming up while driving pushes it back over the line. It still means at least one tire needs air. Check all four with a gauge before driving and fill them to the door-sticker pressure. ### Can I drive with a broken TPMS sensor? Yes, the car drives normally, but the system can no longer warn you when a tire goes low. Check your tire pressures with a gauge at least monthly until the sensor is replaced. In some states, a TPMS warning light that stays on can also fail a safety inspection. ### Should I fill my tires to the max PSI on the sidewall? No. The maximum psi on the sidewall is the most the tire can safely hold, not what your car needs. Overinflating reduces grip, makes the ride harsh and wears the center of the tread faster. Use the door-sticker pressure, measured when the tires are cold, before driving far. ## Sources - [NHTSA: Tire pressure monitoring systems](https://www.nhtsa.gov/equipment/tires#tire-pressure) - [U.S. Tire Manufacturers Association: Tire care](https://www.ustires.org/tire-care) ## Other warning lights - [ABS warning light](https://diagxcar.com/warning-lights/abs) - [Airbag (SRS) warning light](https://diagxcar.com/warning-lights/airbag) - [Battery (charging system) warning light](https://diagxcar.com/warning-lights/battery) - [Brake warning light](https://diagxcar.com/warning-lights/brake) - [Check engine light](https://diagxcar.com/warning-lights/check-engine) - [Coolant temperature warning light](https://diagxcar.com/warning-lights/coolant-temperature) - [Oil pressure warning light](https://diagxcar.com/warning-lights/oil-pressure) - [Power steering warning light](https://diagxcar.com/warning-lights/power-steering) - [Traction control light](https://diagxcar.com/warning-lights/traction-control) ## Symptoms - [What causes uneven tire wear?](https://diagxcar.com/symptoms/uneven-tire-wear) - [Why does my car pull to one side?](https://diagxcar.com/symptoms/car-pulls-to-one-side) ## Repair costs - [Tire rotation cost](https://diagxcar.com/cost/tire-rotation): $25-$60 ## Terms explained - [What is TPMS?](https://diagxcar.com/glossary/tpms) --- Source page: https://diagxcar.com/warning-lights/tire-pressure Updated: 2026-11-03 General information, not a substitute for a qualified mechanic.