What does code P2B5E mean?

DTC codes / P2Bxx · Hybrid propulsion / P2B5E

P2B5EEngine Coolant Flow Control Valve Position Sensor Circuit Low

P2B5E indicates that the powertrain control module (PCM) has detected a low voltage signal from the engine coolant flow control valve position sensor circuit. This sensor reports the actual position of the valve that regulates coolant flow, and a low signal means the PCM sees a voltage below the expected range, suggesting a short to ground, an open circuit, or a faulty sensor.

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.