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DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P25C5

P25C5Brake Booster Temperature Sensor A Circuit Range/Performance

P25C5 indicates that the powertrain control module (PCM) has detected an out-of-range or erratic signal from the brake booster temperature sensor on circuit A. The PCM expects a predictable voltage or resistance from this sensor, and when the signal falls outside the programmed limits or behaves erratically, the code is set.

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.

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