Why Won't My Low Tire Pressure Light Go Off?: 1 Minute to Understanding Tire Pressure Issues

If your low tire pressure light stays on even after you've inflated your tires, it can be frustrating and worrisome. This warning light, also known as the TPMS (Tire Pressure Monitoring System) light, is designed to alert you to any tire that falls below the manufacturer's recommended pressure. Common reasons the light won't turn off include improperly calibrated sensors, slow leaks, seasonal temperature changes, or problems with the TPMS itself.

First, check all four—sometimes even your spare—using a reliable tire pressure gauge. Inflate tires to the recommended PSI (found in your car’s manual or on a sticker near the driver's door). Next, drive for a few miles to allow the sensors to recalibrate. If the light remains, inspect for nails, cracks, or other damage causing slow leaks, or consult a professional for a sensor reset or replacement.

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Seasonal temperature changes can significantly impact tire pressure. Cold weather causes air to contract, possibly triggering your TPMS. Check tires regularly during temperature swings and adjust accordingly.

FAQ

Q: Why is my low tire pressure light still on after filling my tires?

A: The light may stay on if the sensors haven’t reset, there’s a slow leak, or one tire (including the spare) is still below recommended pressure.

Q: How do I reset my tire pressure monitoring system?

A: Many vehicles require you to drive for 10–15 minutes at 50+ mph, or manually reset via a button in the cabin. Refer to your owner’s manual for specifics.

Q: Can cold weather cause the tire pressure light to come on?

A: Yes, colder air decreases tire pressure, often causing the warning light. Check and adjust tire pressures as temperatures drop.

Q: Is it safe to drive with the low tire pressure light on?

A: Prolonged driving with low tire pressure can be unsafe—reduce speed and check your tires as soon as possible to prevent blowouts or poor handling.

Q: Do I need to replace TPMS sensors if the light won't go off?

A: If sensors are faulty or have dead batteries, replacement may be needed. A professional mechanic can diagnose and replace failing TPMS components.