Powertrain, generic (extended)

P2BEC Fuel Control System A Too Lean Bank 1

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

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).

Likely causes

PCM software fault on affected Ford models, fixed by reprogramming
High-pressure pump or its volume regulator delivering too little rail pressure
Direct injectors on bank 1 restricted or coked
Bank 1 upstream oxygen sensor reading skewed

Symptoms

  • Check engine light on
  • Hesitation under acceleration, when the engine relies on direct injection
  • Often no noticeable change in drivability

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–1,800
Time0.5–5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

fuel injectorsfuel pressure regulatorintake system

Related codes

P2BEDP2BEEP2BF0P0171P0087

References: fordservicecontent.com, fordservicecontent.com, static.nhtsa.gov, static.nhtsa.gov.