Powertrain, generic (extended)

P22F2 Cylinder 7 Alternative Fuel Injector Control Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Low voltage on the control line of the cylinder 7 gas injector. The code appears in Ford's 2014 code list with MIL and in the installer table of the Altech-Eco/TransEco CNG kits, which on Ford's V8 (F-150 5.0) and V10 (Super Duty 6.8) engines use the PCM to drive gas valves for all cylinders; cylinders 9 and 10 of the V10 get manufacturer codes there. That table lumps a short to ground and an open line into this code, so P22F1 is not used, and shows MIL on for bi-fuel and off for dedicated CNG. A grounded line can hold the valve open and flood cylinder 7 with gas, an open line starves it. In both cases gas operation is disturbed, while a bi-fuel truck can still run on gasoline.

Likely causes

Cylinder 7 injector control wire grounded on the engine or bracket
Open wire or poor pin contact (reported as Low)
Cylinder 7 gas injector coil failed

Symptoms

  • Check engine light on (bi-fuel versions)
  • Cylinder 7 misfire or rich running on gas
  • Gas mode blocked or ended

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–600
Time0.5–3 h

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

Parts involved

alternative fuel injector

Related codes

P22F1P22F3P22F4P22EEP22F6P0207P0307

References: http:, performanceparts.ford.com, law.cornell.edu.