What resetting your tire pressure monitor actually does
Resetting your tire pressure monitor clears the warning light on your dashboard after you have fixed the underlying tire pressure problem. The monitor itself — a sensor in each tire or a system that reads wheel speed — detects when pressure drops below the manufacturer's recommended level. Once you pump your tires back to the correct pressure, the light usually goes out on its own within a few miles of driving. If it does not, you need to manually reset the system using your car's controls or a diagnostic tool.
The reset is not the same as fixing the problem. If your tires are still underinflated, the light will come back on. The reset just tells the system to stop alerting you — so only reset after you have actually checked and adjusted your tire pressure to match the placard on your driver's door jamb or fuel door.
Key Takeaways
- Check your tire pressure against the number on your driver's door jamb or fuel door before resetting anything — that is the correct pressure for your car, not the number on the tire sidewall.
- Most cars reset the monitor automatically after you drive a few miles at highway speed with properly inflated tires, so you may not need to do anything.
- If the light stays on after correct inflation, you can reset it through your car's steering wheel menu, dashboard buttons, or ignition key sequence — the method depends on your make and model.
- Some vehicles require a diagnostic scanner to reset the monitor, which a tire shop or dealership can do for you.
- A light that comes back on repeatedly after reset usually means a tire is leaking or a sensor is faulty, not that you did the reset wrong.
Check your tire pressure first — this is the step most people skip
Before you reset anything, you need to know what pressure your tires should be at. This number is not on the tire sidewall. The sidewall shows the maximum pressure the tire can safely hold. Your car's correct pressure is on a sticker inside your driver's door jamb, on the fuel door, or sometimes in the owner's manual. Write down all four numbers — front and rear pressures are often different.
Use an accurate tire pressure gauge to check each tire when they are cold, meaning the car has been parked for at least three hours or driven less than a mile at low speed. Tire pressure rises when tires heat up from driving, so a warm reading will be higher than the true pressure. If any tire is below the recommended pressure, use an air pump at a gas station or tire shop to bring it to the correct level. Check all four tires, including the spare if your car has a tire pressure sensor in it.
Let the system reset itself by driving normally
Many cars reset the tire pressure monitor automatically after you drive for 15 to 30 minutes at highway speed with all tires at the correct pressure. The system needs to recalibrate, and highway driving gives it the data it needs to do that. After you have inflated your tires and driven for a while, check whether the light has gone out on its own.
If the light is still on after an hour of normal driving, move to the manual reset methods below. Do not assume the light will never go away — it will not reset itself if the system is waiting for you to tell it to.
Reset through your steering wheel menu or dashboard buttons
Most cars made in the last 15 years let you reset the tire pressure monitor from the driver's seat using buttons on the steering wheel or dashboard. The exact steps vary widely by manufacturer, so check your owner's manual for your specific model — what works on a Honda will not work on a Ford.
Common methods include: holding down a button labeled "Set" or "Menu" on the steering wheel until a tire pressure screen appears, then selecting "Reset" or "Yes"; pressing and holding a dedicated tire pressure button on the dashboard; or scrolling through the instrument cluster menu using steering wheel controls until you find the tire pressure option and select reset. Some cars require you to turn the ignition to the "On" position without starting the engine, then perform the button sequence.
If you are not sure which buttons to use, your owner's manual has a diagram and step-by-step instructions. If you no longer have the manual, you can search your car's year, make, and model plus "reset tire pressure monitor" online, or call your dealership's service department and ask them to walk you through it over the phone.
Use the ignition key sequence method if your car is older
Some vehicles, particularly those made before 2010, reset the tire pressure monitor using a sequence of ignition key turns rather than button presses. A typical sequence might be: turn the key to the "On" position, then back to "Off," then back to "On" three times in quick succession, then turn the key to "Start" to start the engine. The light should blink and then go out.
The exact sequence depends on your car's year and make. Check your owner's manual or search online for your specific vehicle. If you try a sequence and it does not work, you have not damaged anything — just try a different method or take the car to a tire shop.
Take your car to a tire shop or dealership if nothing works
If you have inflated your tires to the correct pressure, driven normally, and tried the manual reset methods without success, the tire pressure monitor may need a diagnostic scanner to reset. This is a tool that connects to your car's computer and can clear the sensor fault code. Most tire shops and all dealerships have this equipment and can reset the system in a few minutes.
A tire shop will usually do this for free or for a small fee if you bought your tires there. A dealership may charge a diagnostic fee, typically $50 to $150 depending on the location. Before you pay, ask whether the fee will be waived if you then have them service your tires or perform other work.
What to do if the light comes back on after reset
If the tire pressure warning light returns within a few days or weeks after you reset it, one of two things is happening: a tire is slowly leaking, or a tire pressure sensor is faulty. Check your tire pressure again using a gauge. If one tire is lower than the others, it has a slow leak — you can drive it to a tire shop to have them find and patch the leak, or replace the tire if it cannot be repaired.
If all four tires are at the correct pressure but the light is still on, a sensor is likely faulty. Sensors can fail after five to ten years, or they can fail sooner if they have been damaged. A tire shop can test the sensors to confirm which one is bad, and replace it for $50 to $200 per sensor depending on your car and the shop. This is a separate cost from tire service.
Frequently Asked Questions
Does resetting the tire pressure monitor fix a slow leak?
No. Resetting only clears the warning light. If a tire is leaking, the pressure will drop again and the light will return. You need to find the leak and repair or replace the tire. A tire shop can locate the leak by submerging the tire in water or using a soapy spray to find where air is escaping.
Can I reset the tire pressure monitor without going to a dealership?
Yes, most cars can be reset from the driver's seat using steering wheel buttons or a key sequence. Check your owner's manual for the exact method for your vehicle. If your car does not have a manual reset option, a tire shop with a diagnostic scanner can do it for you, usually faster and cheaper than a dealership.
Why does the tire pressure light come on in cold weather?
Tire pressure drops in cold weather because air contracts when temperature falls. For every 10 degrees Fahrenheit the temperature drops, tire pressure drops about 1 to 2 pounds per square inch. Check and adjust your tire pressure when the weather changes, and the light should go out. This is normal and does not mean your tires are damaged.
How long does it take for the tire pressure monitor to reset on its own?
Most cars reset automatically after 15 to 30 minutes of highway driving with properly inflated tires. Some vehicles take longer or require a manual reset. If the light is still on after an hour of normal driving, use the manual reset method for your car rather than waiting longer.
What if I do not know my car's correct tire pressure?
Check the sticker on the inside of your driver's door jamb or on the fuel door — this is always the correct pressure for your vehicle. The number on the tire sidewall is the maximum pressure the tire can hold, not the pressure your car needs. If you cannot find the sticker, your owner's manual has the pressure, or you can call your dealership with your vehicle identification number and they will tell you.