What does code P21FE mean?

Q: What does code P21FE mean?

Fuel Control System B Too Lean at Higher Load (Bank 2). P21FE means the engine computer has detected that bank 2 of the fuel control system is running too lean when the engine is under higher load, such as during acceleration or climbing a hill. The computer monitors fuel trim and oxygen sensor feedback and sets this code when it can no longer add enough fuel to bring the air-fuel ratio back to the commanded value on that bank.

DTC codes / P21xx · Fuel and air metering / P21FE

P21FEFuel Control System B Too Lean at Higher Load (Bank 2)

P21FE means the engine computer has detected that bank 2 of the fuel control system is running too lean when the engine is under higher load, such as during acceleration or climbing a hill. The computer monitors fuel trim and oxygen sensor feedback and sets this code when it can no longer add enough fuel to bring the air-fuel ratio back to the commanded value on that bank.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering

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