Powertrain, generic (extended)

P22ED Cylinder 6 Alternative Fuel Injector Control Circuit/Open

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P22ED marks an open control circuit at the cylinder 6 gas injector, the last injector on six-cylinder engines like the 3.6-litre V6 of GM's 2015 bi-fuel Impala, where the ECM drives the CNG injectors directly. Current is missing when the injector should open, so the module records the break. No maker documents P22ED openly: the TransEco AFCM table and Ford's 2014 code list give cylinder 6 only P22EE and P22EF, and TransEco reports an interrupted line as Low, so the same fault may appear as P22EE on such systems. The Impala's ECM changes to the other fuel when one system cannot deliver, so the driver mostly sees gasoline operation and the MIL. Check coil resistance and connector first. P0206 is the gasoline counterpart.

Likely causes

Open coil in the cylinder 6 gas injector
Loose or corroded connector at cylinder 6
Broken wire between control module and cylinder 6 injector

Symptoms

  • Malfunction indicator lamp on
  • Vehicle runs on gasoline although gas is selected
  • Cylinder 6 misfire on dedicated gas engines

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€40–400
Time0.5–2.5 h

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

Parts involved

alternative fuel injector

Related codes

P22EEP22EFP22F0P22E9P0206P0306

References: static.nhtsa.gov, http:, law.cornell.edu.