just bought a 2002 v6 malibu and the check engen light is on so I pluged in the OBD2 in and it threw out 2 codes ...one for the EGR valve and one for the air intake temperature ciruit high input. and that code is P0113....and that one wont go away ...ive replaced bolth ...and just the air intake comes back ...not sure what to do now ...dont want to take it to the dealer . any help would be nice, thank you .