Need help with check engine light

02-14-2019, 06:53 PM

#1

chrisk2361

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2015 C63 AMG 507 edition

Need help with check engine light

After installing the ARH, high flow cats, and x pipe on my c63, i get a check engine light after about 20 miles of driving. The code is the p0420 and p0430. I do not have any tunes on yet. As far as I know, all the o2 sensors are put back on after installation. Any idea how I can fix this? I read numerous threads but cant figure out what to do. If adding spacers to the o2 sensors, where do I get it and which one do I add the spacer to. Or is it getting a tune from eurocharged. Any help will be much appreciated

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02-14-2019, 07:26 PM

#2

SGT-PillzBury

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Mercedes C63 AMG W204

Quote:

Originally Posted by chrisk2361

After installing the ARH, high flow cats, and x pipe on my c63, i get a check engine light after about 20 miles of driving. The code is the p0420 and p0430. I do not have any tunes on yet. As far as I know, all the o2 sensors are put back on after installation. Any idea how I can fix this? I read numerous threads but cant figure out what to do. If adding spacers to the o2 sensors, where do I get it and which one do I add the spacer to. Or is it getting a tune from eurocharged. Any help will be much appreciated

With my experience of gutting the primary cat with stock headers. Those should be a codes saying that your cats are not working efficient and your car is running rich (don't remember if that is the same code I have off the top of my head). I have tried almost every amount of spacers by welding nuts together and even tried doing an L shape type of spacer from eBay but nothing worked (wasn't worth the time and money). I think the only way to clear the code permanently is coding out the o2 sensors or getting a tune. Hope this helped

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02-14-2019, 07:52 PM

#3

chrisk2361

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2015 C63 AMG 507 edition

thanks. The cats are brand new along with headers. I went with cats in one of not having any cel issue. Guess i was wrong. If i go with a tune and coding out the o2, will i pass emission?

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02-15-2019, 11:51 PM

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AMGonFire

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2012 c63 AMG, 2011 GLK 350, 2019 GLS 450

Quote:

Originally Posted by chrisk2361

thanks. The cats are brand new along with headers. I went with cats in one of not having any cel issue. Guess i was wrong. If i go with a tune and coding out the o2, will i pass emission?

no you will not pass emissions with the tune on. It turns off the rear o2 sensors so they will always be not ready. You will not pass. You have 2 options. One add cats to the mid pipe. Or you can try one of those mini catted o2 spacers on eBay. That may or may not work. Some have had good luck.

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02-16-2019, 02:39 AM

#5

chrisridebike8

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'10 C63

Quote:

Originally Posted by AMGonFire

no you will not pass emissions with the tune on. It turns off the rear o2 sensors so they will always be not ready. You will not pass. You have 2 options. One add cats to the mid pipe. Or you can try one of those mini catted o2 spacers on eBay. That may or may not work. Some have had good luck.

he has catted mids. There’s only one spot to put cats on the ARH setup. I’m not sure why the CEL is on.