P2BECFuel Control System A 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
- Engines that combine port and direct injection keep separate fuel trim adaptations for each injection mode. Ford, which uses this code on its PFDI engines such as the 2.7 L EcoBoost and 5.0 L V8 of the F-150, assigns system A to the direct-injection mode. In closed loop, with coolant at 70 to 110 C, at least 12 percent load, 10 percent fuel in the tank and purge switched off, the PCM sets P2BEC when bank 1 long-term trim adds more than 25 percent while short-term trim is still adding over 1 percent, for 2 seconds, and only while the engine runs on DI. A lean bank 1 in every mode would give P0171 instead. Suspects are therefore parts used only by DI: too little rail pressure because the high-pressure pump underdelivers, or restricted direct injectors. Ford also reflashes the PCM for it (20-2324, 22-2393).
- What you may notice
- Check engine light on
- Hesitation under acceleration, when the engine relies on direct injection
- Often no noticeable change in drivability
- Likely causes
- PossiblePCM software fault on affected Ford models, fixed by reprogramming
- PossibleHigh-pressure pump or its volume regulator delivering too little rail pressure
- PossibleDirect injectors on bank 1 restricted or coked
- RareBank 1 upstream oxygen sensor reading skewed
- 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 – €1,800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.