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