AI Diesel Tech
P0302OBD-IIINJECTOR

Cylinder 2 Misfire Detected

Common Symptoms

  • Check engine light illuminated
  • Rough idle or engine vibration
  • Loss of power or hesitation during acceleration
  • Poor fuel economy
  • Engine may shake or stumble under load
  • Possible raw fuel smell from exhaust

Most Likely Root Causes

  • Faulty ignition coil or spark plug on cylinder 2
  • Fuel injector malfunction or clogging on cylinder 2
  • Low compression in cylinder 2 due to mechanical wear
  • Vacuum leak affecting cylinder 2
  • Faulty spark plug wire or ignition coil boot

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Component Location

Cylinder 2 is typically the second cylinder in the firing order, located on the engine block according to manufacturer numbering convention.

Manufacturer Notes

Cylinder numbering convention varies by manufacturer and engine configuration; consult service manual for correct identification of cylinder 2 location.

Also diagnosing J1939 SPN/FMI codes?

Heavy-duty trucks often throw both OBD-II and J1939 faults simultaneously. AI Diesel Tech handles both protocols in a single guided session.

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