tjmc11 Posted June 12, 2008 Share Posted June 12, 2008 I am receiving a code p0420. I am fairly certain this is the code for cat efficiency below threashhold. If anyone has experienced this code, please advise. I can easily replace the cat if needed, but I want to confirm that that is indeed what needs to be done. Also, if you know, which side (R or L) cat should I replace if needed. Thanks for anyone's input! Quote Link to comment Share on other sites More sharing options...
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