What does code P2B85 mean?

Q: What does code P2B85 mean?

Engine Coolant Pump Underspeed. P2B85 means the powertrain control module (PCM) commanded the engine coolant pump to run at a certain speed but the pump's feedback signal reported a lower-than-expected speed. The PCM monitors the pump's electrical circuit or speed sensor and sets this code when the actual pump speed falls below the commanded value for a calibrated time.

DTC codes / P2Bxx · Hybrid propulsion / P2B85

P2B85Engine Coolant Pump Underspeed

P2B85 means the powertrain control module (PCM) commanded the engine coolant pump to run at a certain speed but the pump's feedback signal reported a lower-than-expected speed. The PCM monitors the pump's electrical circuit or speed sensor and sets this code when the actual pump speed falls below the commanded value for a calibrated time.

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.