What does code P2CB4 mean?

Q: What does code P2CB4 mean?

Charge Air Cooler Coolant Pump B Supply Voltage Circuit. P2CB4 indicates that the powertrain control module has detected an abnormal voltage on the supply circuit for the charge air cooler coolant pump 'B', which is the electric pump that circulates coolant through the air-to-liquid intercooler to keep intake air temperatures down. The computer monitors the voltage on the pump's power feed and flags this code when the signal falls outside the expected range, typically indicating an open circuit, short to ground, or a faulty pump.

DTC codes / P2Cxx · Hybrid propulsion / P2CB4

P2CB4Charge Air Cooler Coolant Pump B Supply Voltage Circuit

P2CB4 indicates that the powertrain control module has detected an abnormal voltage on the supply circuit for the charge air cooler coolant pump 'B', which is the electric pump that circulates coolant through the air-to-liquid intercooler to keep intake air temperatures down. The computer monitors the voltage on the pump's power feed and flags this code when the signal falls outside the expected range, typically indicating an open circuit, short to ground, or a faulty pump.

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.