AIR System Pump Overtemperature Bank 1
The AIR pump on bank 1 reports temperature above the protection threshold. Sustained operation, blocked outlet, or cooling path obstruction.
Affected components
- Secondary air injection pump b1
- Wiring harness
- Ecm
Common causes
- High likelihood: Pump outlet restricted
- Medium likelihood: Sustained pump operation
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.