Powertrain, generic (extended)

P2E5A Cylinder 2 Alternative Fuel Misfire Detected

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P2E5A says cylinder 2 is the one losing combustion while the engine is supplied with alternative fuel; P0302 is its petrol twin. No manufacturer documents this code publicly. On inline engines cylinder 2 follows cylinder 1; on V engines it is either the foremost cylinder on the other bank (GM, Chrysler) or the second one of the first bank (Ford, Audi). The gas injector is the typical gas-specific suspect: compressor oil carried in CNG condenses after the pressure regulator, reaches the injectors unevenly and can gum single valves or make them close erratically, as GM and Siemens patents describe. Landi Renzo's service manual for its 6.0-litre CNG conversion asks for misfire codes to check the injector plug, the nozzle seated in its port, the drive signal and injector wiring not crossed between cylinders.

Likely causes

Gas injector on cylinder 2 gummed or sluggish from compressor oil in the gas
Injector harness of the conversion routed crosswise, so cylinder 2 receives another cylinder's pulse
Injection nozzle of cylinder 2 not properly seated in the manifold port
Coil or plug on cylinder 2 too weak for gas operation

Symptoms

  • Uneven running on gas, normal on petrol
  • Higher gas consumption and loss of power
  • Check engine light

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–900
Time0.5–4 h

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

Parts involved

alt fuel injector cyl 2ignition coil cyl 2

Related codes

P2E58P0302P2E59P2E5BP0202

References: law.cornell.edu, image-ppubs.uspto.gov, image-ppubs.uspto.gov, utilimaster.com.