Powertrain, generic (extended)

P22DE Cylinder 2 Alternative Fuel Injector Control Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P22DE stands for a control line of the cylinder 2 gas injector whose voltage is too low. TransEco Energy's AFCM fault table blames a grounded or interrupted wire and turns on the MIL for bi-fuel vehicles; Ford's 2014 OBD code list includes P22DE as a MIL code too. California's OBD rule counts a bi-fuel car among alternate-fueled vehicles just for the periods it actually burns gas, so this monitor matters mainly in gas mode, and on gasoline the car normally behaves as usual. If the grounded wire keeps the injector energized, cylinder 2 is flooded with gas and the plug may foul; a separated wire starves it instead. P22DF is the high side, P22DD the open-circuit code, and P0264 belongs to the gasoline injector.

Likely causes

Cylinder 2 injector control wire grounded on engine or body
Open wire or pin, reported as Low by modules like the TransEco AFCM
Shorted output transistor in the gas control module

Symptoms

  • Malfunction indicator lamp on
  • Rich misfire or fouled spark plug on cylinder 2 in gas mode
  • Gas operation interrupted, engine runs on gasoline

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–450
Time0.5–3 h

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

Parts involved

alternative fuel injector

Related codes

P22DDP22DFP22E0P22DAP0264P0302

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