Powertrain
generic / SAE
P2445
Secondary Air Injection System Pump Stuck On (Bank 1)
The secondary-air pump continues to run after the cold-start window, when the ECU has commanded it off. Usually a stuck-closed relay welding the pump permanently to battery voltage.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number4 / 45
Possible causes
- Pump relay stuck closed high
- Drive line shorted to supply medium
- Carbon or debris buildup preventing free movement low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 40–400 €
- Estimated time: 0.3–2 h
- Component: secondary air pump
- Component: secondary air pump relay
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012