P2447
Secondary Air Injection Pump Stuck On (Bank 2)
Bank 2 secondary air pump runs continuously. Either a stuck-on relay or a shorted control output keeps the pump powered when it should be off.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Relay stuck closedCommon
- Driver stage shorted onPossible
- Carbon or debris buildup preventing free movementLess likely
Parts involved
- Secondary Air Pump B2
- Secondary Air Relay
P2447 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.