Powertrain, generic (extended)

P22EF Cylinder 6 Alternative Fuel Injector Control Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

The counterpart to P22EE: the drive line of the cylinder 6 gas injector stays near battery voltage even when the output stage should pull it down. For Ford pickups and vans converted with the Altech-Eco/TransEco CNG kit, the installer sheet gives as cause is a short to power; the same MIL rule applies (on for bi-fuel, off for dedicated CNG), and the column for the gas module version 1.4 marks this fault as not detected there, so on such units only the PCM catches it. Ford carries P22EF with MIL in its 2014 code list. Because the valve can no longer be opened, cylinder 6 runs lean or misfires while on gas, and a bi-fuel engine typically falls back to gasoline. Open wires are not reported here but under the Low code.

Likely causes

Control wire of the cylinder 6 gas injector touching a battery-voltage feed
Gas harness spliced or pinned incorrectly during the conversion
Moisture bridging supply and control pins in the injector plug
Output stage in the control module no longer switches

Symptoms

  • Check engine light on (bi-fuel versions)
  • Lean misfire on cylinder 6 in gas mode
  • Automatic change to gasoline operation

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

P22EEP22EDP22F0P22EBP22F3P0206

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