09-016-24

Spark Plug Re-Gap to Resolve Misfire Symptoms Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):
• P0300 - Multiple Cylinder Misfire.
• P0301 - Cylinder 1 Misfire.
• P0302 - Cylinder 2 Misfire.
• P0303 - Cylinder 3 Misfire.
• P0304 - Cylinder 4 Misfire.
• P0305 - Cylinder 5 Misfire.
• P0306 - Cylinder 6 Misfire.
• P0307 - Cylinder 7 Misfire.
• P0308 - Cylinder 8 Misfire.
• P0420 - Catalyst System Efficiency Below Threshold Bank 1.
• P0430 - Catalyst System Efficiency Below Threshold Bank 2. The customer may also comment on one or more of the following:
• Excessive vibration.
• Engine runs rough.
• Lack, or loss of power.
• Engine misfire.