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I have a 99 c5 that when I hit a bump the active handling and service engine light come on if i turn the car off and restart it It has reset itself need some help thanks
Write down the codes .... they will have a leading letter (P,C,B, or U) followed by 4 numbers, then either a C and/or an H. Copy down the whole code(s) and post here and someone can look it up in the Service Manual.