What does code P25F6 mean?

Q: What does code P25F6 mean?

AIR System B. P25F6 indicates a fault in the secondary air injection (AIR) system, specifically in circuit or function 'B', which is typically the bank 2 air pump or control circuit on V-engine configurations. The engine control module monitors the AIR system during cold starts and detects an unexpected condition, such as insufficient airflow, an open or shorted circuit, or a performance deviation from the commanded state.

DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P25F6

P25F6AIR System B

P25F6 indicates a fault in the secondary air injection (AIR) system, specifically in circuit or function 'B', which is typically the bank 2 air pump or control circuit on V-engine configurations. The engine control module monitors the AIR system during cold starts and detects an unexpected condition, such as insufficient airflow, an open or shorted circuit, or a performance deviation from the commanded state.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

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