What does code P023C mean?

Q: What does code P023C mean?

Charge Air Cooler Coolant Pump A Control Circuit High. P023C indicates that the powertrain control module has detected an abnormally high voltage on the control circuit for the charge air cooler coolant pump, which is the electric pump that circulates coolant through the air-to-liquid intercooler. The high voltage reading tells the module that the circuit is likely open, shorted to voltage, or that the pump's internal electronics are not drawing the expected current.

DTC codes / P02xx · Fuel and air metering (injector circuits) / P023C

P023CCharge Air Cooler Coolant Pump A Control Circuit High

P023C indicates that the powertrain control module has detected an abnormally high voltage on the control circuit for the charge air cooler coolant pump, which is the electric pump that circulates coolant through the air-to-liquid intercooler. The high voltage reading tells the module that the circuit is likely open, shorted to voltage, or that the pump's internal electronics are not drawing the expected current.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering (injector circuits)

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.