Question on prl catted dp

Ryguy12342

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I just ordered a prl catted downpipe for my 2020 civic si was wondering if I will be okay running without a tune as I have bumper to bumper warranty.
 

WOPSiWOT

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I just ordered a prl catted downpipe for my 2020 civic si was wondering if I will be okay running without a tune as I have bumper to bumper warranty.
You will probably get a CEL and P0420 code for catalyst efficiency. You may or may not have success with a defouler. With a tuning device you can disable the code.
 
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Ryguy12342

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Will the code affect my engine? I don’t want to have problems down the road.
 

BoostinIX

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No, it's telling you the cat isn't working/needs replacing, which by factory specs and emissions requirements it would. Nothing harmful except the annoying light.
 

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