DTC codes / P2Bxx · Hybrid propulsion / P2B5D
P2B5D indicates that the powertrain control module (PCM) has detected an abnormal condition in the electrical circuit for the engine coolant flow control valve position sensor. This sensor reports the actual position of the valve that regulates coolant flow, and the code sets when the sensor signal voltage falls outside the expected range or does not correlate with commanded valve position.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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