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I am a C4 Collectors Edition owner transplanted from Phoenix Arizona to New Jersey for a 3 year assignment (Imagine that). I have the LT1. I really like this site, lot's of good stuff here. I have one question which puzzles me. When your "check engine" light illuminates, does it go off on it's own, or, only after the condition has remedied itself. I plug in the code reader and get an 0157 (?) oxygen sensor. I buy the part and before I install it the light goes off on the control panel. So I think ids the problem a short or intermittant or the light goes out after a fixed amount of time whether or not the problem is remedied.
Hello there, i owned 3 C4's a L98 LT1 & LT4,all were great, i never had a check light so i can't help you there but if you go over to the C4 tech or scan & tune section you will get more help. Good Luck