What does code P25A2 mean?

Q: What does code P25A2 mean?

Brake System Control Module A Requested MIL Illumination. P25A2 is a generic powertrain code indicating that the brake system control module (often the ABS/stability control module) has requested the powertrain control module to illuminate the malfunction indicator lamp (MIL, or check engine light). The code is set when the brake module sends a dedicated MIL request message over the controller area network (CAN) bus, and the engine computer logs that request as a fault.

DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P25A2

P25A2Brake System Control Module A Requested MIL Illumination

P25A2 is a generic powertrain code indicating that the brake system control module (often the ABS/stability control module) has requested the powertrain control module to illuminate the malfunction indicator lamp (MIL, or check engine light). The code is set when the brake module sends a dedicated MIL request message over the controller area network (CAN) bus, and the engine computer logs that request as a fault.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

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.