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Home/DTC Codes/GMC/Envoy/2002-2009 4.2L I6/P0306
P0306

Cylinder 6 Misfire Detected

2002-2009 GMC Envoy 4.2L I6

High SeverityPowertrainGeneric (SAE)

Description

Misfire detected in cylinder 6.

Symptoms

  • Check Engine Light
  • Rough idle
  • Loss of power

Common Causes

  • Worn spark plug #6
  • Faulty ignition coil #6
  • Faulty injector #6
  • Low compression cyl 6

Diagnostic Steps

  1. Swap coil #6
  2. Inspect plug #6
  3. Test injector #6
  4. Check compression

Repair Notes

Swap coil to diagnose.

Related Codes

P0206Injector Circuit/Open - Cylinder 6P0300Random/Multiple Cylinder Misfire Detected

Other Powertrain Codes

P0306 on Other Vehicles

GMC Acadia

2017-2024 2.5L I4

GMC Acadia

2017-2024 3.6L V6

GMC Canyon

2004-2012 2.8L I4

GMC Canyon

2004-2012 3.5L I5

GMC Canyon

2007-2012 2.9L I4

GMC Canyon

2007-2012 3.7L I5

GMC Canyon

2015-2022 3.6L V6

GMC Canyon

2023-2024 2.7L I4 Turbo

Common Questions

What does code P0306 mean on a 2002-2009 GMC Envoy?

P0306 stands for "Cylinder 6 Misfire Detected". Misfire detected in cylinder 6.

What are the symptoms of P0306 on a GMC Envoy?

Common symptoms of P0306 include: Check Engine Light, Rough idle, Loss of power.

What causes P0306 on a 2002-2009 GMC Envoy?

Common causes of P0306 include: Worn spark plug #6, Faulty ignition coil #6, Faulty injector #6, Low compression cyl 6.

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