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Need your help! Dreaded p0420

5267 Views 3 Replies 2 Participants Last post by  Adam-RallysportLTZ
Hello, For the past 4 months I have had the ZZP downpipe, midpipe with spun metal cat and rear section of exhaust with Magnaflow muffler. Also
I have the Trifecta Elite tune. Now I havent had any issues until recently and I keep getting the p0420 code. I thought this was something that
wouldnt happen after being tuned. What should I do?
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I read every post on that thread and none were any help towards my condition. I have 1.4L with modifications. My main concern
is to why I had no problems for 4 months and now the CEL is illuminating.
I spoke with ZZP aswell as Trifecta and they both agreed that deleting the code with tune software was the route to take.
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