P2444
Secondary Air Injection System Pump Stuck Off (Bank 1)
The secondary-air pump does not run when commanded during cold start. Often a seized pump (after exhaust back-feed corroded the impeller), a blown fuse, or a failed relay.
- 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 by corrosionCommon
- Pump relay failedPossible
- Pump fuse blownPossible
Parts involved
- Secondary Air Pump
- Secondary Air Pump Relay
- Secondary Air Pump Fuse
P2444 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.