P21FEFuel Control System B Too Lean at Higher Load (Bank 2)
- 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
- 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.
- What you may notice
- Check engine lamp on
- Loss of pull at full throttle
- Likely causes
- PossibleRestricted port injectors on bank 2
- PossibleWeak shared supply (lift pump, filter, low-pressure sensor) if both banks lean
- RareHarness or connector fault on bank 2 injectors
- 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: €50 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.