P2446
Secondary Air Injection Pump Stuck Off (Bank 2)
Bank 2 secondary air pump does not deliver air when commanded. The catalyst light-off process is delayed and cold-start emissions rise.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Pump seized from condensate corrosionCommon
- Relay failed openPossible
- Carbon or debris buildup preventing free movementLess likely
Parts involved
- Secondary Air Pump B2
- Secondary Air Relay
P2446 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.