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.