Diagnostic Aids

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

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 .