What does code P2B9D mean?

Q: What does code P2B9D mean?

Coolant Pump A Supply Voltage Circuit. This code indicates that the engine control module has detected an abnormal voltage condition on the power supply circuit for the electric coolant pump, often called the auxiliary or intercooler pump. The module monitors the voltage feed to the pump and sets the code when the circuit falls outside the expected range, which can prevent the pump from running and lead to inadequate coolant circulation.

DTC codes / P2Bxx · Hybrid propulsion / P2B9D

P2B9DCoolant Pump A Supply Voltage Circuit

This code indicates that the engine control module has detected an abnormal voltage condition on the power supply circuit for the electric coolant pump, often called the auxiliary or intercooler pump. The module monitors the voltage feed to the pump and sets the code when the circuit falls outside the expected range, which can prevent the pump from running and lead to inadequate coolant circulation.

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.