What does code P2AC3 mean?

Q: What does code P2AC3 mean?

Intake Air O2 Sensor Reference Voltage Circuit/Open Bank 2. P2AC3 indicates that the powertrain control module has detected an open circuit or abnormal reference voltage on the signal return path for the bank 2 intake air oxygen sensor. This sensor monitors oxygen content in the intake tract on the bank 2 side, and the code sets when the reference voltage circuit does not behave as expected during key-on or running checks.

DTC codes / P2Axx · Hybrid propulsion / P2AC3

P2AC3Intake Air O2 Sensor Reference Voltage Circuit/Open Bank 2

P2AC3 indicates that the powertrain control module has detected an open circuit or abnormal reference voltage on the signal return path for the bank 2 intake air oxygen sensor. This sensor monitors oxygen content in the intake tract on the bank 2 side, and the code sets when the reference voltage circuit does not behave as expected during key-on or running checks.

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.