For 1990-2009 cars

Cause | Correction
--- | ---
Worn, damaged, or improperly installed accessory drive belt - severe cracking, bumps or missing segments. A misfire DTC may be present without an actual misfire condition. |

1. Inspect the accessory drive system components.
2. Repair or replace damaged components as required.

Worn, damaged, or improperly installed accessory drive system components. A misfire DTC may be present without an actual misfire condition. |

1. Inspect the accessory drive system components.
2. Repair or replace damaged components as required.

Worn, damaged, improperly installed or loose crankshaft pulley. A misfire code may be present without an actual misfire condition. |

1. Inspect the crankshaft pulley.
2. Repair or replace damaged components as required.

Worn, damaged, improperly installed or loose engine flywheel. A misfire code may be present without an actual misfire condition. |

1. Inspect the engine flywheel.
2. Repair or replace damaged components as required.

Worn, damaged or improperly installed piston. Pistons must be installed with the mark, or dimple, on the top of the piston, facing the front of the engine; piston pins must be centered in the connecting rod pin bore. Oil consumption may or may not cause the engine to misfire. |

1. Inspect the spark plugs. Refer to Spark Plug Inspection .
2. Verify engine compression. Refer to Engine Compression Test .
3. Inspect the cylinder bores.
4. Inspect the pistons.
5. Inspect the piston pins.
6. Inspect the connecting rods.
7. Repair or replace damaged components as required.

Worn, damaged or improperly installed crankshaft thrust bearing. A misfire code may be present without an actual misfire condition. |

1. Inspect the crankshaft.
2. Inspect the crankshaft thrust bearing.
3. Repair or replace damaged components as required.