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This week my check engine light came on. I have a 2010 3.8 manual GT car. The codes are P0300, P0301, P0302, P0303, P0352, P0353, P0354, and P0364 currently. I know the P030X is misfires and P035X are Ignition problems but when I look up P0364 it says it is reserved. What does it mean? Also if I clear the codes they come back after about 5 blocks and are different P030X and P035X codes.
 

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Sounds like you have a bad ground somewhere...
Or coils are bad, but I doubt that, since it rare to have that many misfires...
Or bad/mis-gapped spark plugs.
 
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