OBD-II code · Powertrain (generic, extended)
P2BF0 Fuel Control System B Too Lean Bank 1
Fuel control system B 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.
Is it safe to drive with P2BF0?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyVacuum leak downstream of MAF
- PossibleFuel rail pressure low
Symptoms
- Check engine light on
- Rough idle, possible stalling
- Hesitation or hard cold start
- Power loss under load
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–6 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Fuel Injectors, Fuel Pressure Regulator, Intake System
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.