Powertrain, generic (extended)

P2E5C Cylinder 4 Alternative Fuel Misfire Detected

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P2E5C is stored when the misfire counter blames cylinder 4 while gas is being burned; in petrol mode the code would be P0304. No manufacturer documents P2E5C publicly, and Deutz's fault list for its eControls LPG, CNG and bi-fuel engines reports such events with the ordinary P0301 to P0304. On four-cylinder engines cylinder 4 is the last one in the block. Ignition is the main gas-related suspect: NGK points out that a gas/air charge needs a clearly higher firing voltage than petrol, which loads the coils and wears the plugs faster, and the US Department of Energy notes that natural gas reacts more sensitively to spark quality. A coil or plug that still works on petrol can therefore drop out on gas alone. Check plug type and gap for gas, coil and boot, then move the coil to another cylinder.

Likely causes

Spark plug on cylinder 4 worn or unsuited for gas (gap too wide, wrong heat range)
Coil or plug boot on cylinder 4 breaking down under the higher firing voltage
Gas injector on cylinder 4 sticking or delivering too little

Symptoms

  • Misfire mainly under load or acceleration on gas
  • Engine runs cleanly after switching to petrol
  • Check engine light, flashing during heavy misfire

Repair estimate

DifficultyEasyDIY possible
Parts and labour€40–700
Time0.3–3 h

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

Parts involved

alt fuel injector cyl 4ignition coil cyl 4

Related codes

P2E58P0304P2E5BP0354P0204

References: law.cornell.edu, serdia.deutz.com, ngkpartfinder.co.uk, afdc.energy.gov.