What does code P23FE mean?

Q: What does code P23FE mean?

Bank 1 System B Air-Fuel Ratio Imbalance. P23FE means the powertrain control module has detected a fuel-air imbalance on Bank 1 that is specific to System B, which is the second air-fuel ratio monitoring circuit or sensor group on that bank. The computer is comparing the expected air-fuel ratio against what the oxygen or wideband sensor is reporting and has found the correction needed to keep the mixture balanced has exceeded its calibrated limit.

DTC codes / P23xx · Ignition system and misfire / P23FE

P23FEBank 1 System B Air-Fuel Ratio Imbalance

P23FE means the powertrain control module has detected a fuel-air imbalance on Bank 1 that is specific to System B, which is the second air-fuel ratio monitoring circuit or sensor group on that bank. The computer is comparing the expected air-fuel ratio against what the oxygen or wideband sensor is reporting and has found the correction needed to keep the mixture balanced has exceeded its calibrated limit.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

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.