What does code P2B65 mean?

Q: What does code P2B65 mean?

Coolant Pump B Overspeed/Air in System. P2B65 indicates that the powertrain control module has detected an overspeed condition in coolant pump B, or it has inferred that air is present in the cooling system based on pump behavior. The computer compares commanded pump speed with feedback from the pump or other sensors, and it sets this code when the pump runs faster than expected or when the pump's speed signal suggests it is cavitating due to air.

DTC codes / P2Bxx · Hybrid propulsion / P2B65

P2B65Coolant Pump B Overspeed/Air in System

P2B65 indicates that the powertrain control module has detected an overspeed condition in coolant pump B, or it has inferred that air is present in the cooling system based on pump behavior. The computer compares commanded pump speed with feedback from the pump or other sensors, and it sets this code when the pump runs faster than expected or when the pump's speed signal suggests it is cavitating due to air.

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.