P2C81
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.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Pump outlet restrictedCommon
- Sustained pump operationPossible
Parts involved
- Secondary Air Injection Pump B1
- Wiring Harness
- ECM
P2C81 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.