Powertrain, generic (extended)

P2E60 Cylinder 8 Alternative Fuel Misfire Detected

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P2E60 is the last cylinder-specific code of the alternative-fuel misfire group and points to cylinder 8; the next code, P2E61, covers misfire with low fuel. Petrol twin: P0308. No manufacturer documents P2E60 openly. On GM V8s cylinder 8 is the rear cylinder of the even-numbered bank, on Ford V8s the rear of the second bank. In Ford's 1999 bi-fuel LPG/CNG system for the 5.4-litre V8 a metering unit called Compuvalve supplied gas, and an adjustable tuning tee split the flow between the two rails, so a poor split can starve one side. A patent on cleaning Compuvalve injectors names compressor oil as the main deposit. A GM patent shows the protective idea behind such codes: switch a misfiring cylinder to liquid fuel instead of cutting it, which would cost about a quarter to a third of torque.

Likely causes

Deposits from compressor oil in the gas injector serving cylinder 8
Coil or plug on cylinder 8, often hard to reach at the rear of the engine
Uneven gas split between the two rails starving the bank with cylinder 8 (older bi-fuel systems)
Valve seat wear on cylinder 8 after long gas operation

Symptoms

  • Misfire on gas, possibly with lean codes on one bank
  • Engine shakes at idle on gas
  • Check engine light

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–1,200
Time0.5–5 h

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

Parts involved

alt fuel injector cyl 8ignition coil cyl 8

Related codes

P2E58P0308P2E5FP2E61P0174

References: law.cornell.edu, static.nhtsa.gov, image-ppubs.uspto.gov, image-ppubs.uspto.gov.