What does code P25C4 mean?

Q: What does code P25C4 mean?

Brake Booster Temperature Sensor A Circuit. P25C4 indicates that the powertrain control module (PCM) has detected an abnormal condition in the electrical circuit for the brake booster temperature sensor, which is used to monitor the temperature of the brake booster assembly. The PCM compares the sensor signal to expected values and sets this code when the voltage or resistance falls outside the normal range, often due to a wiring fault or sensor failure.

DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P25C4

P25C4Brake Booster Temperature Sensor A Circuit

P25C4 indicates that the powertrain control module (PCM) has detected an abnormal condition in the electrical circuit for the brake booster temperature sensor, which is used to monitor the temperature of the brake booster assembly. The PCM compares the sensor signal to expected values and sets this code when the voltage or resistance falls outside the normal range, often due to a wiring fault or sensor failure.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.