What does code P2AC6 mean?

Q: What does code P2AC6 mean?

Intake Air O2 Sensor Reference Voltage Circuit High Bank 2. P2AC6 indicates that the engine control module has detected an abnormally high voltage on the reference circuit for the bank 2 intake air oxygen sensor, which is the sensor positioned before the catalytic converter on the side of the engine that does not contain cylinder number one. The computer expects a steady, regulated reference voltage, typically around 0.45 volts, and it flags this code when the signal line reads above the expected threshold for a calibrated period.

DTC codes / P2Axx · Hybrid propulsion / P2AC6

P2AC6Intake Air O2 Sensor Reference Voltage Circuit High Bank 2

P2AC6 indicates that the engine control module has detected an abnormally high voltage on the reference circuit for the bank 2 intake air oxygen sensor, which is the sensor positioned before the catalytic converter on the side of the engine that does not contain cylinder number one. The computer expects a steady, regulated reference voltage, typically around 0.45 volts, and it flags this code when the signal line reads above the expected threshold for a calibrated period.

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.