What does code P2B59 mean?

Q: What does code P2B59 mean?

Engine Coolant Flow Control Valve Control Circuit/Open. P2B59 indicates that the powertrain control module (PCM) has detected an open circuit or a loss of continuity in the electrical path for the engine coolant flow control valve. This valve regulates coolant flow to manage engine temperature and cabin heating, and the code sets when the control circuit does not show the expected voltage or current.

DTC codes / P2Bxx · Hybrid propulsion / P2B59

P2B59Engine Coolant Flow Control Valve Control Circuit/Open

P2B59 indicates that the powertrain control module (PCM) has detected an open circuit or a loss of continuity in the electrical path for the engine coolant flow control valve. This valve regulates coolant flow to manage engine temperature and cabin heating, and the code sets when the control circuit does not show the expected voltage or current.

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.