Will installing a cat back exhaust trigger my check engine light?

fcha045 · 12-13-2018, 12:08 PM

I just purchased a Mishimoto cat-back exhaust system. I have not done any modifications on my car so far so this will be the first one. I will not do any modifications to the catalytic converter and will keep it on there. All I am planning to do is add the exhaust system but I am worried that it will trigger the CEL.

Anyone had this modification done? If so, did it trigger the CEL?

Thanks in Advance

18ss376 · 12-13-2018, 12:11 PM

If you keep the O2 sensors, AFM & NPP valves it should be fine.

VinnAY · 12-13-2018, 12:51 PM

You can disco NPP harness and not throw a light

12-13-2018, 12:08 PM	#1
fcha045 Drives: 2017 Chevrolet Camaro 2.0t Join Date: Dec 2018 Location: California Posts: 2	Will installing a cat back exhaust trigger my check engine light? I just purchased a Mishimoto cat-back exhaust system. I have not done any modifications on my car so far so this will be the first one. I will not do any modifications to the catalytic converter and will keep it on there. All I am planning to do is add the exhaust system but I am worried that it will trigger the CEL. Anyone had this modification done? If so, did it trigger the CEL? Thanks in Advance

12-13-2018, 12:11 PM	#2
18ss376 Drives: Camaro Join Date: Sep 2018 Location: USA Posts: 520	If you keep the O2 sensors, AFM & NPP valves it should be fine.

12-13-2018, 12:51 PM	#3
VinnAY Account Suspended Drives: 18 1SS/1LE Join Date: Jun 2018 Location: Missouri Posts: 939	You can disco NPP harness and not throw a light

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