Powertrain
generic / SAE
P25F7
AIR System B Incorrect Flow Detected
The second AIR system delivers measurably more or less air than expected. Often a partially blocked pipe, a worn pump, or a leak between pump and check valve.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / F7
Possible causes
- Air pipe partially blocked by carbon high
- Worn pump impeller reduces flow medium
- Leak between pump and check valve medium
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–1500 €
- Estimated time: 1.5–5 h
- Component: air pump b
- Component: air check valve
- Component: air flow sensor
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012