Tire pressure light is staying on in instrument panel. checked tire pressures. all correct

There are two typical types of tire pressure monitoring systems, direct and indirect. Direct TPMS uses individual battery powered sensors on each wheel to report tire pressure to the computer and if this is the case one of your sensors may have failed. Indirect TPMS uses a combination of values measured externally to each wheel (rotation velocity, temperature, etc.) then the computer calculates nominal values and indicates when a wheel is performing outside those nominal values thus indicating a potential low tire pressure situation. Any false indications with an indirect TPMS may be due to a fault within the ECU (computer) or other feedback sensor.

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