P2E60

Code

Generic P — Powertrain

Cylinder 8 Alternative Fuel Misfire Detected

Brand: Generic

Type: P — Powertrain

Views: UK: 21 EN: 31 RU: 21

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Faulty ignition on cylinder 8 (bad spark plug, ignition coil, or high-voltage lead)
Clogged, leaking, or failed alternative-fuel injector/solenoid for cylinder 8
Low compression (worn rings, burnt valve, head gasket leak) on cylinder 8
Incorrect air/fuel ratio for cylinder 8 due to fuel pressure/regulator or metering issue
Vacuum or intake leak affecting cylinder 8 mixture
Faulty crankshaft or camshaft position sensor or poor sync causing misfire detection

Symptoms

Illuminated Malfunction Indicator Lamp (MIL/CEL)
Rough idle or engine vibration, especially at idle or low load
Loss of power, hesitation, or surging under acceleration
Reduced fuel economy and increased emissions
Occasional backfire or popping (with gaseous fuels)
Fuel smell (depending on fuel type) or unusual exhaust odor

What to check

Read stored codes and freeze-frame data; note vehicle speed, load, engine RPM, fuel system status and fuel type at time of fault
Check live data: cylinder-specific misfire counters, short/long-term fuel trims, O2 sensor voltages, MAF/MAP, and fuel rail/alternative fuel pressure
Inspect spark plug, coil, and high-voltage wiring on cylinder 8 for wear, fouling, or damage
Visually inspect alternative-fuel injectors/solenoids and connectors for damage or corrosion
Scan for related codes (fuel pressure, cam/crank sensors, injector or coil circuit codes)
Perform a compression or cylinder leak-down test on cylinder 8

Signal parameters

Cylinder-specific misfire counters and DTC set threshold
Crankshaft speed variation (CKP fluctuation) used to detect misfire
Injector pulse width and frequency for cylinder 8
Ignition coil primary current and secondary voltage/energy
Fuel rail pressure (for liquid fuel) or alternative fuel supply pressure (CNG/LPG)
Short-term and long-term fuel trim values (STFT/LTFT)

Diagnostic algorithm

Retrieve and record all DTCs, freeze-frame, and live datastream. Note whether vehicle was operating on alternative fuel when fault occurred.
Clear codes and attempt to re-create the misfire. Use a road or loaded-idle test to reproduce while monitoring cylinder-specific misfire counts.
Inspect cylinder 8 spark plug and ignition coil. Replace if fouled, damaged, or out of spec. If unsure, swap coil with another cylinder to see if the misfire follows.
Inspect and test the alternative-fuel injector/solenoid on cylinder 8. Verify electrical continuity, drive pulses, and that the injector actually flows (use a current probe, stethoscope, or flow test where applicable). Swap with another cylinder to isolate.
Check fuel supply: confirm correct alternative-fuel pressure at the regulator, inspect filters, hoses, and valves for leaks or restrictions.
Perform a compression test or cylinder leak-down test on cylinder 8 to rule out mechanical failure.
Inspect intake manifold, gasket, and any port-injector seals for leaks affecting cylinder 8. Use smoke test or spray test cautiously and only with approved methods for the fuel system.
Verify cam and crank sensor signals, timing marks, and cam/crank synchronization. Repair timing or sensor faults if found.
Inspect wiring and connectors for coil/injector and repair any corrosion, broken wires, or bad grounds. Check PCM drive outputs if suspected.
If components are replaced or repairs performed, clear codes and perform extended drive cycle under conditions that previously caused the fault. Confirm no return of misfire and that fuel trims, O2 readings, and misfire counters are normal.
If no cylinder-specific cause is found, consider ECU/PCM software updates or manufacturer technical service bulletins for alternative-fuel misfire strategies.

Likely causes

Ignition coil or spark plug failure on cylinder 8
Cylinder 8 alternative-fuel injector not delivering fuel (stuck/blocked or electrical fault)
Low compression in cylinder 8 (mechanical problem)
Alternative fuel pressure/regulator or supply issue causing lean condition on that cylinder
Wiring or connector fault to coil or injector on cylinder 8

Fault status

⚠️ Status

Cylinder 8 misfire detected while running on alternative fuel. Possible causes include ignition failure (spark/coil), failed or restricted alternative-fuel injector, low compression, fuel pressure or metering problems, wiring/connector faults, or timing/sensor issues. Diagnose cylinder-specific ignition, fuel delivery, mechanical condition, and related sensors before repair.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.5-4 hours