What does code P2B5C mean?

Q: What does code P2B5C mean?

Engine Coolant Flow Control Valve Supply Circuit Low. P2B5C indicates that the powertrain control module (PCM) has detected a low-voltage condition on the supply circuit feeding the engine coolant flow control valve. This valve regulates coolant flow to manage engine temperature and cabin heating, and a low supply circuit means the valve may not receive enough voltage to operate correctly.

DTC codes / P2Bxx · Hybrid propulsion / P2B5C

P2B5CEngine Coolant Flow Control Valve Supply Circuit Low

P2B5C indicates that the powertrain control module (PCM) has detected a low-voltage condition on the supply circuit feeding the engine coolant flow control valve. This valve regulates coolant flow to manage engine temperature and cabin heating, and a low supply circuit means the valve may not receive enough voltage to operate correctly.

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.