What does code P2275 mean?

Q: What does code P2275 mean?

O2 Sensor Signal Stuck Rich (Bank 1 Sensor 3). P2275 means the powertrain control module (PCM) has detected that the downstream oxygen sensor on bank 1, sensor 3, is reporting a rich exhaust condition and the signal is not responding to changes in fuel trim. The PCM expects the post-catalyst sensor to oscillate or switch, but instead it sees a steady rich voltage that stays above the lean threshold for too long.

DTC codes / P22xx · Fuel and air metering (injector circuits) / P2275

P2275O2 Sensor Signal Stuck Rich (Bank 1 Sensor 3)

P2275 means the powertrain control module (PCM) has detected that the downstream oxygen sensor on bank 1, sensor 3, is reporting a rich exhaust condition and the signal is not responding to changes in fuel trim. The PCM expects the post-catalyst sensor to oscillate or switch, but instead it sees a steady rich voltage that stays above the lean threshold for too long.

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.