Friday, January 19, 2007

Code P0301 on 2001 Pontiac Grand Am with 2.4L engine


My 2001 Grand Am has a misfire code P0301 when scanned. The engine was also quitting at stop lights. Initial repairs included replacing the spark plugs that included the ignition coil. After doing all of these, misfiring is still present and I am now thinking of replacing either the ignition module or the engine computer. Any suggestion?

ATS Advisor:

The most common cause of this misfiring is a shorted ignition coil housing. When you replaced the spark plugs, the housing should been checked for heat burns on the housing which will verify such condition. shown on top is a picture of the housing. If you invert it, most heat burns will occur between the spark plug mounting holes.


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