Diagnostic Aids

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A misfire may only occur when the engine is under a load or when the engine is cold.

A misfire DTC could be caused by an excessive vibration from sources other than the engine. Inspect for the following possible sources:

A tire or wheel that is out of round or out of balance
Variable thickness brake rotors
An unbalanced drive shaft
Certain rough road conditions
A damaged accessory drive component or belt
Inspect for a damaged reluctor wheel. The Crankshaft Position System Variation Learn procedure may need to be performed. Refer to Crankshaft Position System Variation Learn .