I have a 2003 tib V6 with an AEM C.A.I and some exhaust modifications (I removed the second cat and replaced both rear mufflers). These modifications were done several months ago, but now every once in a while my check engine light will appear. After disconnecting the battery the light will be gone for a few weeks, only to re-appear latter. It has done this now three time in the last couple of months. Any suggestions on what it may be? I am hesitant to take it to the dealer because of the intake and exhaust mods... Any help would be appreciated.

aranoid: