Powertrain
generic / SAE
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.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number4 / 46
Possible causes
- Pump seized from condensate corrosion high
- Relay failed open medium
- Carbon or debris buildup preventing free movement low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 200–900 €
- Estimated time: 0.8–3 h
- Component: secondary air pump b2
- Component: secondary air relay
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012