Powertrain, generic (extended)

P21FE Fuel Control System B Too Lean at Higher Load (Bank 2)

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P21FE is the bank 2 counterpart of P21FC: in the upper load zone the second injection path on bank 2 needs more enrichment than its adaptation may supply. It can only appear on two-bank engines with per-bank sensors and dual injection. No manufacturer documents it publicly, and Ford, which uses port plus direct injection on V engines such as the 5.0 Coyote from 2018, reports port-side lean faults per bank as P2BF2 without load cells. If only bank 2 is lean at high load, suspect restricted port injectors or harness trouble on that bank; if both banks set high-load lean codes, the supply side they share is more likely, for example the lift pump, the filter or the low-pressure sensor. A loss of pull at full throttle may be felt. P2193 belongs to system A.

Likely causes

Restricted port injectors on bank 2
Weak shared supply (lift pump, filter, low-pressure sensor) if both banks lean
Harness or connector fault on bank 2 injectors

Symptoms

  • Check engine lamp on
  • Loss of pull at full throttle

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–900
Time0.5–4 h

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

Parts involved

fuel injectorcharge air pipe

Related codes

P21FFP21FCP21F6P21FAP2193P2BF2

References: fordservicecontent.com, en.wikipedia.org, law.cornell.edu.