What does code P23F2 mean?

Q: What does code P23F2 mean?

Cylinder 1 Injector B Air-Fuel Ratio Imbalance. P23F2 indicates that the powertrain control module (PCM) has detected an air-fuel ratio imbalance specific to cylinder 1's 'B' injector circuit, meaning the fuel injector for that cylinder is not delivering fuel at the expected rate or timing. The PCM compares crankshaft speed fluctuations and oxygen sensor feedback to identify that cylinder 1 is contributing unevenly to the engine's overall power balance.

DTC codes / P23xx · Ignition system and misfire / P23F2

P23F2Cylinder 1 Injector B Air-Fuel Ratio Imbalance

P23F2 indicates that the powertrain control module (PCM) has detected an air-fuel ratio imbalance specific to cylinder 1's 'B' injector circuit, meaning the fuel injector for that cylinder is not delivering fuel at the expected rate or timing. The PCM compares crankshaft speed fluctuations and oxygen sensor feedback to identify that cylinder 1 is contributing unevenly to the engine's overall power balance.

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.