Powertrain
generic / SAE
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.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number4 / 47
Possible causes
- Relay stuck closed high
- Driver stage shorted on medium
- Carbon or debris buildup preventing free movement low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–600 €
- Estimated time: 0.5–2 h
- Component: secondary air pump b2
- Component: secondary air relay
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012