P2BF0Fuel Control System B Too Lean Bank 1
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- Fuel system B is, in Ford's monitor documents, the port fuel injection mode of engines that also have direct injectors. P2BF0 therefore means bank 1 runs lean only when the port injectors do the work. The decision rule matches the DI codes: long-term trim past plus 25 percent, short-term trim past plus 1 percent, held for 2 seconds during closed-loop operation with purge off. The suspects differ, though. Port injectors are fed by the low-pressure side, so a weak in-tank pump or low supply pressure, a clogged port injector or air entering past a port injector O-ring or intake gasket fit better than a high-pressure fault. Ford ships port injector O-rings with the 2.7 L injector repair in bulletin 20-2324 and lists P2BF0 in its reflash bulletins 20-2257, 21-2045 and 22-2393.
- What you may notice
- Check engine light on
- Uneven idle or surging at light load
- Hesitation when pulling away
- Likely causes
- PossibleLow-pressure fuel pump or supply pressure too weak for the port injectors
- PossiblePort injector on bank 1 clogged
- PossibleAir leak at a port injector O-ring or intake manifold gasket
- PossiblePCM software, Ford reprogramming bulletins
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.