exhaust/engine light

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Apr 26, 2008 | 04:04 PM

zukidragon

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exhaust/engine light

I was wondering if doing a cat-back exhaust would make the check engine light come on, or if it would prematurely burn out either of the O2 sensors ?

Apr 26, 2008 | 06:10 PM

LilSparkPlug

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RE: exhaust/engine light

No it shouldn't. But if you replaced the cat with a straight downpipe that would cause a P0420 Catalyitic Converter Inefficiency code.

Apr 26, 2008 | 08:25 PM

taekwon11

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RE: exhaust/engine light

My car is Stage 2 and I am getting ready to do away with my cat. Will I get the code you mention? Someone else said previously that the S2 ECU doesn't check. Thanks for your help.

Apr 28, 2008 | 07:18 PM

zukidragon

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RE: exhaust/engine light

Is there any way to fix it, or do I have to re-install my cat for inspect?

Apr 28, 2008 | 07:28 PM

PSI Chick

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RE: exhaust/engine light

it doesn't matter, it will read stoich

Apr 28, 2008 | 07:42 PM

Plan B

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RE: exhaust/engine light

You will pass emmissions with or without a cat and be code freewith a staged PCM

Apr 30, 2008 | 07:06 AM

prpaster

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RE: exhaust/engine light

I thought you will fail emissions with a staged PCM becuase it throws a skim Key Code

exhaust/engine light

exhaust/engine light

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