What does code P2274 mean?

Q: What does code P2274 mean?

O2 Sensor Signal Stuck Lean (Bank 1 Sensor 3). P2274 means the powertrain control module (PCM) has detected that the downstream oxygen sensor on bank 1, sensor 3, is reporting a lean exhaust condition and the signal is not responding as expected to fuel changes. The PCM monitors this sensor's voltage and sees it stuck at a low value, indicating either a genuine lean condition or a sensor/circuit fault that prevents the reading from moving.

DTC codes / P22xx · Fuel and air metering (injector circuits) / P2274

P2274O2 Sensor Signal Stuck Lean (Bank 1 Sensor 3)

P2274 means the powertrain control module (PCM) has detected that the downstream oxygen sensor on bank 1, sensor 3, is reporting a lean exhaust condition and the signal is not responding as expected to fuel changes. The PCM monitors this sensor's voltage and sees it stuck at a low value, indicating either a genuine lean condition or a sensor/circuit fault that prevents the reading from moving.

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.