Cars · Tires
Can I Ignore a TPMS Warning Light?
PROBABLY NOT
Deal with this soon rather than later.
Probably not. A steady TPMS light usually means one or more tires are significantly underinflated, so check the tires and pressure as soon as you can. If a tire looks flat or the car feels unstable, stop driving.
Decision summary
- Can I drive?Usually briefly, after checking the tires
- UrgencyHigh
- Safety riskModerate
- Fix difficultyUsually easy
How bad is it?
Choose the closest match.
Picking a match above updates this from the general verdict: PROBABLY NOT.
CHECK THE PRESSURE SOON
A tire can be low without looking flat. Check all four tires with a gauge instead of judging them by appearance.
Do thisInflate any low tire to the vehicle manufacturer's recommended cold pressure.
COLD WEATHER CAN TRIGGER IT
Tire pressure falls as the air gets colder. A tire that was already close to the warning threshold can turn the light on after a cold night.
Do thisCheck the pressure while the tires are cold and inflate them to the placard specification if needed.
FIND THE LEAK
Repeated pressure loss can come from a puncture, valve leak, rim leak or wheel damage. Adding air does not fix the cause.
Do thisHave the tire inspected for a leak.
THE TPMS MAY HAVE A FAULT
This pattern usually means the monitoring system is not working properly. It may not warn you about low pressure as intended.
Do thisCheck tire pressures manually and have the TPMS inspected.
CHECK THE PRESSURES AND SYSTEM
The pressures may need correction or the TPMS may need the vehicle-specific setup procedure. Replacement wheels or sensors can also cause a TPMS malfunction.
Do thisCheck the tire pressures first, then follow the owner's manual if the light stays on or flashes.
DO NOT KEEP DRIVING
A visibly low or flat tire can overheat and suffer internal damage if you continue driving on it.
Do thisStop safely and use a suitable spare or roadside assistance.
STOP WHEN IT IS SAFE
New vibration, pulling or thumping can mean the tire has lost more pressure or has other damage.
Do thisSlow down and stop somewhere safe. Inspect the tires before continuing.
What Happens If You Ignore TPMS Warning Light?
RIGHT NOW
The system warns you about low pressure
TPMS has detected significant underinflation in at least one tire, or the system itself has detected a malfunction.
IF A TIRE IS LOW
The tire flexes more
Low pressure makes the tire bend more as it rolls.
KEEP DRIVING UNDERINFLATED
Heat and wear build up
Extra flex creates heat and can damage the tire's rubber and internal structure.
IF PRESSURE KEEPS FALLING
Handling can get worse
The car may begin pulling, vibrating or responding differently when you steer and brake.
WORST CASE
The tire can fail
Severe underinflation and accumulated damage can lead to tire failure.
In short
- Warning light
- More flex
- Heat and damage
- Poor handling
- Tire failure
How Long Can I Ignore It?
| Situation | Ignore it? | What to do |
|---|---|---|
| Steady TPMS light and all tires look normal | Briefly | Check all four tires with a pressure gauge as soon as practical. |
| Light appeared after a cold-weather temperature drop | Briefly | Check the pressures cold and inflate to the vehicle placard specification if needed. |
| Pressure is low but the tire still holds its shape | No | Add air soon and check whether the pressure drops again. |
| The same tire keeps losing pressure | No | Have the tire checked for a puncture or other leak. |
| TPMS light flashes and then stays on | Not for long | Check tire pressures manually and arrange a TPMS inspection. |
| Tire looks nearly flat | No | Do not continue driving normally. Use a suitable spare or roadside assistance. |
| Car vibrates, pulls or thumps | No | Stop when safe and inspect the tires before continuing. |
What Should I Do Now?
Step 1: Step 1: Look at all four tires
If one tire looks flat or badly damaged, do not keep driving on it normally.
Step 2: Step 2: Check the pressure with a gauge
Use the recommended cold pressure on the driver's door placard or in the owner's manual. Do not use the maximum pressure molded into the tire sidewall.
Step 3: Step 3: Add air if a tire is low
Inflate the tire to the vehicle manufacturer's cold-pressure specification. If the same tire loses pressure again, have it checked for a leak.
Step 4: Step 4: Notice whether the light is flashing
A light that flashes for about a minute and then stays on usually indicates a TPMS malfunction. Check the pressures yourself until the system is fixed.
Stop Driving If You Notice:
- A tire looks flat or nearly flatDriving on a severely underinflated tire can damage it quickly.
- The car starts pulling or feels unstableStop when safe and check the tires before continuing.
- You hear new thumping or feel heavy vibrationThe tire may be badly underinflated or damaged.
- Pressure drops again soon after adding airThe tire may have a puncture or another leak.
- There is a nail, cut or sidewall bulgeVisible tire damage needs inspection even if the TPMS light is the first thing you noticed.
Why Does the TPMS Light Matter?
TPMS watches for significant underinflation. When the warning comes on, check the tires with a pressure gauge and compare them with the cold-pressure numbers on the vehicle placard or in the owner's manual.
A tire can look normal and still be low. Low pressure makes the tire flex more and build heat, which can hurt handling and eventually damage the tire. A TPMS light that flashes for about a minute and then stays on usually means the monitoring system itself has a fault.
Common Questions
Can I drive with the TPMS light on?
Usually for a short distance if the tires look normal and the car feels normal, but check the pressure as soon as you can. Do not keep driving on a visibly low or flat tire.
Why did my TPMS light come on when it got cold?
Tire pressure drops as temperature falls. Cold weather can push a borderline tire low enough to trigger the warning.
Can I tell if a tire is low just by looking at it?
No. A tire can be underinflated and still look normal, so use a pressure gauge.
What pressure should I use?
Use the recommended cold tire pressure on the vehicle placard or in the owner's manual. The number molded into the tire sidewall is not the vehicle's recommended pressure.
What does a flashing TPMS light mean?
If it flashes for about a minute and then stays on, the TPMS has usually detected a system malfunction. Check the tire pressures manually until the problem is fixed.
Why is my TPMS light still on after adding air?
One or more tires may still be low, the system may need time or a vehicle-specific reset procedure, or the TPMS itself may have a fault. Check the owner's manual if the pressures are correct and the light stays on.
Will the TPMS light go away on its own when the weather warms up?
It may if the warning was caused by a small temperature-related pressure drop. Check and correct the pressure instead of waiting for warmer weather.
Does the spare tire have a TPMS sensor?
It depends on the vehicle. Check the owner's manual for how your spare tire is monitored.
Can a bad TPMS sensor make the warning light come on?
Yes. A system fault can trigger the TPMS malfunction warning even when tire pressure is correct.
Do I still need to check tire pressure if the TPMS light is off?
Yes. TPMS warns about significant underinflation and does not replace regular pressure checks.
Sources
National Highway Traffic Safety Administration
Tire Safety Ratings and Awareness — TireWise
NHTSA consumer guidance on TPMS, tire pressure and underinflation.
U.S. Code of Federal Regulations
49 CFR 571.138 — FMVSS No. 138, Tire pressure monitoring systems
Federal TPMS performance requirements, low-pressure warning requirements and the flashing malfunction-indicator sequence.
Toyota Motor North America
2025 Quick Reference Guide — Tire Pressure Monitoring System
Manufacturer guidance on temperature-related warnings, tire-pressure specifications and the approximately one-minute flashing TPMS malfunction pattern.
General tire-safety guidance only. TPMS does not replace a pressure gauge or regular tire checks. Use the recommended cold tire pressure on the vehicle placard or in the owner's manual.
Other Tire Problems You Might Be Ignoring
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