What the tire pressure monitor does
Your Honda Accord has a system called the Tire Pressure Monitoring System, or TPMS, that watches the air pressure in all four tires while you drive. When one or more tires drop below a set pressure — usually around 25 pounds per square inch (psi) — a light shaped like an exclamation mark inside a tire appears on your dashboard. This light is telling you that at least one tire needs air, not that your tire has failed.
The system uses sensors mounted inside each tire's valve stem or on the wheel rim itself. These sensors send wireless signals to your car's computer every few seconds. The computer compares the pressure readings to a threshold and triggers the warning light if any tire falls too low. On most Accords, the light stays on until you add air to bring all tires back to the correct pressure.
Understanding how this system works helps you respond correctly when the light comes on. It is not a sign of danger — it is information that your tires need attention before a real problem develops.
Key Takeaways
- The TPMS light means at least one tire is underinflated, usually by 10 percent or more below the recommended pressure for your Accord.
- The correct tire pressure for your specific Accord is printed on a sticker inside the driver's door jamb, not on the tire itself.
- Cold weather, a slow leak, or a faulty sensor can all trigger the light, and you should check your tires with a manual gauge to confirm which one is low.
- If the light blinks while you are driving, one of the TPMS sensors may be malfunctioning and needs replacement.
- Replacing a TPMS sensor typically costs between $150 and $250 per sensor at a Honda dealership or independent shop.
Where to find your Accord's correct tire pressure
Do not use the pressure number printed on the tire itself. That number is the maximum pressure the tire can safely hold, not the pressure your Accord needs. Instead, look for a white or silver sticker on the inside of your driver's side door jamb, just above where the door latches. This sticker lists the correct pressure for your front tires and rear tires — they may be different numbers.
The pressure on the door jamb sticker is what your tires should be 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 as tires heat up from driving, so checking pressure after highway driving will give you a reading that is 3 to 5 psi higher than the true cold pressure.
Write down the correct pressures from your door jamb sticker and keep them in your phone or glove box. You will need them every time you check your tires.
Why the TPMS light turns on
The most common reason is a slow leak. A nail, puncture, or worn valve stem can let air escape gradually over days or weeks. Cold weather also lowers tire pressure — air contracts in cold temperatures, so your tires may lose 1 psi for every 10-degree drop in outside temperature. If the light comes on in fall or winter, check your tire pressure before assuming there is a leak.
A faulty TPMS sensor is another possibility. Sensors have batteries that last 5 to 10 years, and they can fail or lose signal. If you check all four tires with a manual gauge and they are all at the correct pressure, but the light stays on, a sensor is likely dead.
Occasionally, the light comes on after you have had a tire replaced or rotated. This can happen if the technician did not reset the system or if a sensor was damaged during service. A Honda dealership or tire shop can reset the TPMS in a few minutes.
How to respond when the light comes on
First, do not panic. The light does not mean your tire will fail when ready. Pull over at a safe location — a gas station, parking lot, or home — and check all four tires with a manual tire pressure gauge. These gauges cost $5 to $15 and are available at any auto parts store or gas station. Press the gauge onto the valve stem on each tire and note the reading.
Compare each reading to the correct pressure on your door jamb sticker. If one or more tires are low, add air at a gas station or tire shop until they reach the correct pressure. Most gas stations have free air pumps. After you add air, drive the car for a few minutes so the tires warm up slightly, then check the pressure again to make sure it is still correct.
If all four tires are at the correct pressure but the light is still on, the problem is likely a faulty sensor. Schedule an appointment with a Honda dealership or independent tire shop to have the system diagnosed. Do not ignore a blinking TPMS light — this means a sensor has failed and needs replacement.
The difference between a steady light and a blinking light
A steady TPMS light means one or more tires are underinflated. This is the most common alert. You should add air to your tires, but you can drive normally to reach a gas station or tire shop.
A blinking TPMS light that blinks for several minutes when you start the car, then stays steady, means the system is performing a self-check and found a problem. This usually indicates a faulty sensor. You should have the system checked soon, but it is not an emergency.
A TPMS light that blinks while you are actively driving means a sensor is malfunctioning right now. This is rare, but if it happens, drive carefully to a tire shop or dealership and have the sensor replaced. A blinking light while driving can also indicate a serious electrical problem with the TPMS module itself.
TPMS sensor replacement and maintenance
If you determine that a sensor has failed, you will need to replace it. Honda dealerships charge between $150 and $250 per sensor, including the part and labor. Independent tire shops often charge less, sometimes $100 to $180 per sensor. The sensor is a small electronic device that screws onto the valve stem inside the wheel, so replacement requires removing the tire.
When you have a tire replaced, rotated, or balanced, tell the technician that your car has TPMS sensors. A careless technician can damage a sensor during service, so mentioning it reminds them to be careful. If a sensor is damaged during service, the shop should replace it at no charge.
TPMS sensors do not need routine maintenance, but they do have a limited lifespan. Most sensors last 5 to 10 years before the battery dies. If your Accord is older and you have never replaced a sensor, one may fail soon. Replacing all four sensors at once costs more upfront but saves you from replacing them one at a time as they fail.
What to do if the light stays on after adding air
If you have added air to all four tires and brought them to the correct pressure, but the light remains on after 10 to 20 minutes of driving, one of three things is happening: a tire is leaking air faster than you added it, a sensor is faulty, or the TPMS module itself has a problem.
Check your tires again with a manual gauge. If one tire has already dropped below the correct pressure, you have a leak. Mark that tire with a piece of tape and take it to a tire shop for inspection. They can patch a small puncture or tell you if the tire needs replacement.
If all tires are still at the correct pressure, the problem is almost certainly a faulty sensor or module. Schedule an appointment with a Honda dealership or independent shop that has TPMS diagnostic equipment. They can identify which sensor has failed and replace it.
Frequently Asked Questions
Can I drive with the TPMS light on?
Yes, you can drive with the light on, but you should not ignore it. A steady light means your tires are underinflated, which reduces fuel economy and can cause uneven tire wear. Add air as soon as you can. A blinking light while driving is more serious and means a sensor is failing — drive carefully to a shop and have it checked.
Does cold weather always trigger the TPMS light?
Not always, but it can. Tire pressure drops in cold weather, and if your tires were already close to the threshold, a temperature drop may push them below it. Check your tire pressure in cold weather and add air if needed. Once spring arrives and temperatures rise, the light may turn off on its own.
What if I just had my tires rotated and the light came on?
The shop may not have reset the TPMS after rotation, or a sensor may have been damaged during service. Call the shop and ask them to reset the system for free. If the light stays on after a reset, ask them to check whether a sensor was damaged and replace it at no charge.
How much does it cost to replace a TPMS sensor on a Honda Accord?
A Honda dealership typically charges $150 to $250 per sensor, including parts and labor. Independent tire shops often charge $100 to $180 per sensor. Prices vary by location and shop, so call ahead to compare.
Can I replace a TPMS sensor myself?
Removing the sensor requires taking the tire off the wheel, which needs a tire machine to balance afterward. Most people should have a professional do this. If you have tire equipment at home, you can replace the sensor yourself, but you will still need to balance the tire and reprogram the new sensor to your Accord's system.