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TPMS Light On? What the Tire Pressure System Is Telling You

Spare tire riding along after a flat
Spare tire riding along after a flat
Solid, flashing, or on-again-off-again — the tire light has three messages, and one of them is about the sensors.

Three lights, three meanings

A solid TPMS light means a tire is meaningfully low — check all four, because the slow leak rarely picks the tire you would guess. A light that flashes for a minute at startup then stays on means a sensor has failed (their batteries last 7–10 years, then die one by one). A light that comes on cold mornings and clears by noon is just physics: pressure drops about 1 PSI per 10°F.

Quick tips

  • The spare has a sensor on some models — the leak might be in the trunk
  • Sensor batteries die as a generation; budget for the set
  • TPMS is a backup, not a substitute — a gauge still beats it monthly

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Call (310) 340-6775
📞 Call (310) 340-6775 — 24/7