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Home/DTC Codes/Mitsubishi/Lancer/2011-2011 2.0L I4/P0303
P0303

Cylinder 3 Misfire Detected

2011-2011 Mitsubishi Lancer 2.0L I4

High SeverityPowertrainGeneric (SAE)

The 2011 Mitsubishi Lancer is equipped with a 2.0L inline-4 engine. Below you'll find detailed p0303 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.

Description

Misfire detected in cylinder 3.

Symptoms

  • Check Engine Light
  • Rough idle
  • Vibration
  • Loss of power

Common Causes

  • Worn spark plug #3
  • Faulty ignition coil #3
  • Faulty injector #3
  • Low compression cyl 3

Diagnostic Steps

  1. Swap coil #3
  2. Inspect spark plug #3
  3. Test injector #3
  4. Check compression

Repair Notes

Swap coil to diagnose.

Related Codes

P0203Injector Circuit/Open - Cylinder 3P0300Random/Multiple Cylinder Misfire Detected

Other Powertrain Codes

P0303 on Other Vehicles

Mitsubishi 3000GT

1996-1996 3.0L V6 Twin Turbo

Mitsubishi 3000GT

1997-1997 3.0L V6 Twin Turbo

Mitsubishi 3000GT

1998-1998 3.0L V6 Twin Turbo

Mitsubishi 3000GT

1999-1999 3.0L V6 Twin Turbo

Mitsubishi Colt JP

2002-2002 1.3L I4 4A90

Mitsubishi Colt JP

2002-2002 1.5L I4 4A91

Mitsubishi Colt JP

2003-2003 1.3L I4 4A90

Mitsubishi Colt JP

2003-2003 1.5L I4 4A91

Common Questions

What does code P0303 mean on a 2011-2011 Mitsubishi Lancer?

P0303 stands for "Cylinder 3 Misfire Detected". Misfire detected in cylinder 3.

What are the symptoms of P0303 on a Mitsubishi Lancer?

Common symptoms of P0303 include: Check Engine Light, Rough idle, Vibration, Loss of power.

What causes P0303 on a 2011-2011 Mitsubishi Lancer?

Common causes of P0303 include: Worn spark plug #3, Faulty ignition coil #3, Faulty injector #3, Low compression cyl 3.

Last updated: March 2026

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