Symptom guide
Low Tire Pressure Light On
What to do when the TPMS or low tire pressure warning appears.
Quick answer
The light usually means one or more tires are low, but it can also indicate a TPMS sensor fault.
Most likely causes
- Low tire pressure
- Temperature drop
- Slow puncture
- TPMS sensor battery failure
- Incorrect tire size or reset
Basic driver checks
- Use a tire pressure gauge when tires are cold.
- Inspect for nails or sidewall damage.
- Compare pressure to the door placard.
- Notice if light flashes before staying on.
DIY diagnostic path
- Inflate to placard pressure, not tire sidewall maximum.
- Do not drive on a visibly flat tire.
- Recheck pressure after a day.
- Reset TPMS only after correcting pressure.
Common mistakes
- Ignoring pressure because tire looks normal
- Overinflating to sidewall max
- Resetting TPMS without checking tires
What to tell the mechanic
Say which tire was low and whether pressure drops again after inflation.