Question about 1998 Pontiac Grand Am
Engine code is P0404 what does it mean and can i fix it myself
Code 404 is a problem with the performance of the EGR valve.
Someone would need to test the operation of the valve and the sensor that watches it. You would need a shop manual for the procedure and basic tools.
Posted on Jan 09, 2013
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Posted on Jan 02, 2017
You can reset it with a scanner through the diagnostic port or you can disconnect the battery negative cable for 5 minutes or pull the ECM 1 and 2 fuse for 5 minutes.
Posted on Jun 16, 2011
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