Diagnostic Aids

Excessive vibration from sources other than the engine could cause DTC P0300 to set. The following are possible sources of vibration:

• A tire or wheel that is out of round or out of balance
• Variable thickness brake rotors
• A unbalanced or damaged driveline condition
• Certain rough road conditions
• Worn or damaged accessory drive component or belt

For an intermittent condition, refer to Intermittent Conditions .