Powertrain
generic / SAE
P2BEC
Fuel Control System A Too Lean Bank 1
Fuel control system A on bank 1 reports a persistently lean condition. Long-term fuel trim is at the positive limit, indicating insufficient fuel delivery or unmetered air ingress.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberB / EC
Possible causes
- Vacuum leak downstream of MAF high
- Fuel rail pressure low medium
Symptoms
- Check engine light on
- Rough idle, possible stalling
- Hesitation or hard cold start
- Power loss under load
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 150–1500 €
- Estimated time: 1–6 h
- Component: fuel injectors
- Component: fuel pressure regulator
- Component: intake system
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012