14 Silvy

Active Member
Dec 7, 2015
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Ok guys I done a muffler delete and I cleaned the intake 2 weeks ago. Now the problem is I'm constantly getting a P0420 code I checked everything no leaks in exhaust or anything. So I scheduled an appointment at the dealer just wondering if they will try to say the muffler delete caused it. Thanks in advance

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why did you clean the intake?

make sure you dont have any air leaks in the intake. the computer is calculating how much air is going through the MAF sensor, then knows how much fuel its putting in, and should have a certain reading at the o2. if there is a air leak, its getting extra air the MAF sensor isnt seeing.
 

14 Silvy

Active Member
Dec 7, 2015
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I don't have any air leaks I also put my factory air box back on. The reason for cleaning it was it has 68,000 and I figured that the valves were getting gummed up had a small rough idle. The cleaning cleared that up but now dealing with the check engine light. Just wondering if dealer will say muffler delete caused it and void my warranty.

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Graystone

Well-Known Member
Apr 25, 2014
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I don't have any air leaks I also put my factory air box back on. The reason for cleaning it was it has 68,000 and I figured that the valves were getting gummed up had a small rough idle. The cleaning cleared that up but now dealing with the check engine light. Just wondering if dealer will say muffler delete caused it and void my warranty.

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Very possible they will say it.
 

14 Silvy

Active Member
Dec 7, 2015
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Yep sure did.

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- - - - - - - - - -auto merged double post- - - - - - - - - -

Ok quick update took it in to the dealer it is the catalytic converter they ordered a new y pipe assembly and are covering it under warranty. :D
 
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