Check Engine Light Due to Engine Misfire on Pontiac Sunfire

The ignition module or an ignition coil may fail causing an engine misfire, the Check Engine Light may or may not illuminate. Diagnoses will be required to determine the cause and needed repair.

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Average mileage: 102,857 (11,000–205,000)
Engines affected: 2.2L 4 Cylinder, 2.4L 4 Cylinder
5 model years affected: 1999, 2002, 2003, 2004, more2005
14 people reported this problem
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Viewing 1 - 4 of 4 problem details
2002 Pontiac Sunfire - 2.2L 4 Cylinder 104,000 mi,
I have had this car a year now, not even. Put about 25,000 miles on it I am on coil pack #3 and module #6 from the zone. Car has been to 2 private shops and a dealer, No one can find anything wrong causing this. Now I have a misfire at 3000 plus RPM. Here we go again. It would really be a nice little car without this grief.
2005 Pontiac Sunfire 205,000 mi,
Lack of power.
2005 Pontiac Sunfire 30,000 mi,
Drove away from the gas station without replacing gas cap, not sure if that was related to problem. After a few blocks, check engine light came on. Closed gas cap, but engine began running very rough, light remained on. Had check engine code diagnosed, was told that coilpack had failed - had to have it replaced.
2005 Pontiac Sunfire - 2.2L 4 Cylinder 77,000 mi,
failure of ignition module effecting two cylinders. Check engine light came on. Engine missing badly and smelled of unburned gas.Had to replace module and secondarily clean plugs. $800