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Tire Pressure Light On? TPMS Guide and Fixes

Sarah Mitchell
2/7/2026
5 min read
Tire Pressure Light On? TPMS Guide and Fixes — Maintenance guide

Key Takeaway

Your TPMS light is on. Here's what it means, how to check your tire pressure correctly, and when it's safe to keep driving.

What Is TPMS?

TPMS stands for Tire Pressure Monitoring System. It's been mandatory in all US vehicles since 2007. The system uses sensors inside your tires to monitor air pressure and alerts you when pressure drops below a safe threshold (typically 25% below recommended PSI).

What the TPMS Light Means

Light BehaviorMeaning
Solid amberAt least one tire is low on pressure
Flashing then solidTPMS sensor malfunction + low pressure
Flashing onlyTPMS sensor fault (not necessarily low pressure)

Recommended Tire Pressures

Your vehicle's recommended tire pressure is printed on a sticker on the driver's side door jamb (not on the tire sidewall — that's the maximum, not the recommended).

Vehicle TypeTypical Recommended PSI
Sedan30 – 35 PSI
SUV / Crossover32 – 36 PSI
Truck / Van35 – 44 PSI
Sports Car30 – 38 PSI
How to diagnose Tire Pressure Light On? TPMS Guide and Fixes — OBD2 car scanner guide
Tire Pressure Light On? TPMS Guide and Fixes — Maintenance diagnostic guide

Common Causes of Low Tire Pressure

  • Temperature change — Tires lose ~1 PSI for every 10°F drop in temperature. A cold morning can trigger the TPMS.
  • Slow puncture — A nail or screw causing a gradual leak.
  • Valve stem leak — Worn or damaged valve stems allow air to escape.
  • Rim damage — Bent or corroded rims can break the tire's seal.
  • Normal air permeation — Tires naturally lose 1-2 PSI per month.

    • What to Do When the Light Comes On

    1. Don't panic. Low tire pressure is usually not a blowout risk unless pressure is extremely low.

    2. Check all four tires with a handheld gauge (including the spare if applicable).

    3. Inflate to the recommended PSI found on the door sticker.

    4. Drive for a few miles. The TPMS light usually turns off automatically once pressure normalizes.

    5. If the light returns, check for a slow leak and visit a tire shop.

    Tire Pressure Safety Chart

    PSI LevelStatusAction
    Recommended (e.g., 32)OptimalNone needed
    5 below recommendedLowInflate soon
    10+ below recommendedDangerousDo not drive at highway speeds
    Flat (near 0)CriticalDo not drive, use spare or call roadside

    ProHow Steer Helps

    For vehicles with supported TPMS integration, Steer can display tire pressure data on your dashboard and alert you when any tire is trending lower than normal — before it triggers the TPMS light.

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