What does code P2276 mean?

Q: What does code P2276 mean?

O2 Sensor Signal Stuck Lean (Bank 2 Sensor 3). P2276 means the engine computer has detected that the downstream oxygen sensor on bank 2 (the side of the engine that does not contain cylinder 1) is reporting a lean exhaust condition and that the signal is stuck, meaning it is not responding to changes in the air-fuel mixture as it should. The computer monitors this sensor after the catalytic converter to verify catalyst efficiency and fuel control, and it sets this code when the sensor voltage remains below a calibrated threshold for too long without the expected switching activity.

DTC codes / P22xx · Fuel and air metering (injector circuits) / P2276

P2276O2 Sensor Signal Stuck Lean (Bank 2 Sensor 3)

P2276 means the engine computer has detected that the downstream oxygen sensor on bank 2 (the side of the engine that does not contain cylinder 1) is reporting a lean exhaust condition and that the signal is stuck, meaning it is not responding to changes in the air-fuel mixture as it should. The computer monitors this sensor after the catalytic converter to verify catalyst efficiency and fuel control, and it sets this code when the sensor voltage remains below a calibrated threshold for too long without the expected switching activity.

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.