Urgency: Moderate
Tire Pressure Warning Light (TPMS)
Investigate soon. Driving short distances is generally okay, but book a diagnostic check.
What the Tire Pressure Warning Light (TPMS) Means
The TPMS light on a your car indicates one or more tires are significantly under-inflated, or the monitoring system itself has a fault. Correct pressure matters for safety, handling, and fuel economy.
Common Causes
- Cold weather lowering pressure
- Slow puncture or nail
- Under-inflation over time
- Failed TPMS sensor battery
- Recent tire rotation not relearned
How to Fix It
- Check all four tire pressures with a gauge when cold
- Inflate to the placard value (door jamb sticker)
- Inspect for nails or damage if one tire keeps dropping
- Drive to let the system re-read, or perform the TPMS relearn
- Replace a failed sensor if the light flashes then stays on