What does code P2B5F mean?

DTC codes / P2Bxx · Hybrid propulsion / P2B5F

P2B5FEngine Coolant Flow Control Valve Position Sensor Circuit High

P2B5F indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the signal circuit of the engine coolant flow control valve position sensor. This sensor reports the actual position of the valve that regulates coolant flow, and a high voltage typically means the signal wire is shorted to power, the sensor's ground reference is lost, or the sensor itself has failed.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

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