Powertrain, generic (extended)

P22E5 Cylinder 4 Alternative Fuel Injector Control Circuit/Open

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P22E5 is the open-circuit code for the cylinder 4 gas injector; on four-cylinder gas engines it is the last injector of the set. The driver sees no current when it switches the injector on. No maker documents P22E5 in public sources: TransEco and Ford's 2014 list stop at the cylinder 4 Low/High codes P22E6 and P22E7, and TransEco files an open line under Low. Ford's 2003 bi-fuel CNG trucks show a typical layout where gas enters through sleeves in the gasoline injector seats, with the gas injectors driven by a separate module, so connectors sit close to hot engine parts. Expect a switch back to gasoline on bi-fuel cars and a dead cylinder 4 on dedicated gas engines. P0204 is the gasoline counterpart.

Likely causes

Open coil in the cylinder 4 gas injector
Heat-damaged or brittle connector near the exhaust side
Broken wire in the cylinder 4 injector circuit

Symptoms

  • Malfunction indicator lamp on
  • Gas mode unavailable, car runs on gasoline only
  • Cylinder 4 dead on a dedicated gas engine

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

P22E6P22E7P22E8P22E1P0204P0304

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