The powertrain control module detects an abnormal voltage from the brake fluid level sensor circuit that indicates the fluid level is higher than expected. This typically points to a fault in the sensor, its wiring, or the sensor's reference voltage.
The sensor itself may have an internal short or drift causing a high‑input signal.
Damaged, corroded, or loose wiring/connector to the sensor can produce an incorrect high voltage reading.
If the fluid is actually low, the sensor may report a high‑input condition when the float is down.
Problems in the cluster's input circuitry can mimic a sensor fault.
A rare failure of the PCM's sensor input circuit can cause a false high‑input reading, but this is unlikely.
No. The code usually indicates a sensor or wiring problem, not a failure of the brakes themselves.
Driving with the brake warning light on is unsafe; the fluid level should be checked promptly and the issue diagnosed.
It is possible but uncommon; most often the fault lies in the sensor, its wiring, or low fluid level.
Resetting may turn off the light temporarily, but the underlying fault will usually return unless repaired.