Check Engine Soon light is on

P0420= Catalyst System Efficiency Below Threshold (Bank 1)

P0430= Catalyst System Efficiency Below Threshold (Bank 2)

If you are running an offroad X or H pipe, the O2 sensors are telling the computer the Convertors aren't working correctly.

and if im running a catted x?? whats f'ed up then?

JoeStimec said:

and if im running a catted x?? whats f'ed up then?

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Pm me your email address and I'll send you a detailed troubleshooting list by P**** code that may be of help. It lists most likely causes and what to look for. :bigthumbsup

I edited one of the emails to only show the two codes you asked about, the long list may help you later with other codes.

I've heard that highflow cats can throw the code too. How long have you had the x pipe.

What brand high flow pipes have issues? I have had a set of UPR 2.5 dual catted high flow X pipe for 50-60,000 miles and they have never shot a code.

i have pypes catted x and for probably 2-3 months now. didn't think they highflow would throw a code. and PM sent

JoeStimec said:

i have pypes catted x and for probably 2-3 months now. didn't think they highflow would throw a code. and PM sent

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Email sent. :bigthumbsup

i was just wondering if me switching from Unleaded to Premium would do anything to throw those codes? thanks

it shouldnt... worse case scenario give pypes a call and say your high flow cats aren't working properly. im sure if you make a big enough deal they will swap them out.

might do that. kinda mad. although pypes were cheap.. like 200 less than anyone else :-\ guess u get what u pay for