What does code P2AC9 mean?

Q: What does code P2AC9 mean?

Charge Air Cooler Coolant Temperature Sensor B Circuit Low. P2AC9 indicates that the powertrain control module has detected a low-voltage condition on the signal circuit of the charge air cooler coolant temperature sensor, which is sensor B when multiple sensors are used. The computer expects a voltage within a specific range that varies with temperature, and a sustained low reading tells it the circuit is shorted to ground or the sensor has failed.

DTC codes / P2Axx · Hybrid propulsion / P2AC9

P2AC9Charge Air Cooler Coolant Temperature Sensor B Circuit Low

P2AC9 indicates that the powertrain control module has detected a low-voltage condition on the signal circuit of the charge air cooler coolant temperature sensor, which is sensor B when multiple sensors are used. The computer expects a voltage within a specific range that varies with temperature, and a sustained low reading tells it the circuit is shorted to ground or the sensor has failed.

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.