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.
Affected components
- Secondary air pump b2
- Secondary air relay
Common causes
- High likelihood: Pump seized from condensate corrosion
- Medium likelihood: Relay failed open
- Low likelihood: Carbon or debris buildup preventing free movement
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.