| | 0420 gonna cost me?
I have had my "service engine light" on for a couple weeks, got it scanned at autozone, throwin code 0420, bad cat, called the local pontiac dealer, asked about it, he said it was under warranty, but wasnt sure if it was because i have an SLP cat-back. second he said id have to pay for diagnostics. anyone else have this problem and have their converter(s) replaced? did you have to pay for diagnostics? -Justin