Powertrain, generic (extended)

P22EE Cylinder 6 Alternative Fuel Injector Control Circuit Low

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

On engines that burn natural gas or propane through their own gas injectors, the control module watches the drive line of each gas valve. This code means the line to the cylinder 6 gas injector sits at a lower voltage than the switching state allows. The installer table of the Altech-Eco (formerly TransEco) CNG system for Ford F-150, Super Duty and Transit treats both a short to ground and a broken wire as this fault; it lights the MIL on bi-fuel trucks but not on dedicated CNG ones. Ford lists the code with MIL in its 2014 spark-ignition code list and checks it continuously. With a grounded line the valve may stay energised; an open line leaves it shut. Bi-fuel engines usually keep running on gasoline.

Likely causes

Control wire of the cylinder 6 gas injector chafed through to ground

Broken wire or loose plug at the gas injector (counted as Low by this system)

Gas injector coil burnt open

Faulty output stage in the PCM or gas control module

Symptoms

Check engine light on (bi-fuel versions)
Rough running or misfire on cylinder 6 in gas mode
System switches to gasoline or will not enter gas mode

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

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