What does code P23F7 mean?

Q: What does code P23F7 mean?

Cylinder 6 Injector B Air-Fuel Ratio Imbalance. P23F7 indicates that the engine control module (ECM) has detected an air-fuel ratio imbalance on cylinder 6 that is specifically attributed to injector B, meaning the ECM's fuel trim and misfire monitoring logic has identified that injector's contribution is outside the expected range. The ECM compares crankshaft speed fluctuations and exhaust oxygen content to determine that cylinder 6 is not receiving or combusting fuel correctly relative to the other cylinders.

DTC codes / P23xx · Ignition system and misfire / P23F7

P23F7Cylinder 6 Injector B Air-Fuel Ratio Imbalance

P23F7 indicates that the engine control module (ECM) has detected an air-fuel ratio imbalance on cylinder 6 that is specifically attributed to injector B, meaning the ECM's fuel trim and misfire monitoring logic has identified that injector's contribution is outside the expected range. The ECM compares crankshaft speed fluctuations and exhaust oxygen content to determine that cylinder 6 is not receiving or combusting fuel correctly relative to the other cylinders.

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.