What does code P2379 mean?

Q: What does code P2379 mean?

O2 Sensor Out of Range During Deceleration Bank 2 Sensor 2. P2379 means the powertrain control module (PCM) saw the downstream oxygen sensor on bank 2 report a voltage outside its expected range while the engine was decelerating. During deceleration the PCM expects a lean exhaust signal, and a sensor stuck rich or swinging erratically sets this code.

DTC codes / P23xx · Ignition system and misfire / P2379

P2379O2 Sensor Out of Range During Deceleration Bank 2 Sensor 2

P2379 means the powertrain control module (PCM) saw the downstream oxygen sensor on bank 2 report a voltage outside its expected range while the engine was decelerating. During deceleration the PCM expects a lean exhaust signal, and a sensor stuck rich or swinging erratically sets this code.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaIgnition system and misfire

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.