If the TPMS light comes on and stays on, one or more of the tires has low pressure and needs to be inflated to the placard pressure. 

If the TPMS light flashes, one or more of the sensors is not communicating with the vehicle.

The sensor could be damaged or have a dead battery. OE TPMS sensors typically last 7-10 years. If the vehicle is in this year range with one dead battery, the rest are likely to die soon.

If one or more of the sensors needs to be replaced, the test features found on some TPMS scan tools can help identify which sensor is bad. 

Knowing the status of each sensor will help you determine the service plan before breaking down the tires.

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