OBD-II code · Powertrain (generic, extended)
P2BF2 Fuel Control System B Too Lean Bank 2
Fuel control system B on bank 2 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 P2BF2?
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
- P2BECFuel Control System A Too Lean Bank 1
- P2BEEFuel Control System A Too Lean Bank 2
- P2BF0Fuel Control System B Too Lean Bank 1
- P2BEFFuel Control System A Too Rich Bank 2
- P2BF1Fuel Control System B Too Rich Bank 1
- P2BF3Fuel Control System B Too Rich Bank 2
- P2BF4Exhaust Flow Control Valve A Position Circuit
- P2BF5Exhaust Flow Control Valve A Position Circuit Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.