CEL with 200 cel Cats?
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C43
CEL with 200 cel Cats?
For those using downpipes with 200 cel high-flow cats: Do you get a check engine light with these installed (i.e. without a stage 2 tune)? I have looked at threads in c43 and non-c43 sections of this board, as well as on other message boards, and have not found a clear answer (it seems to vary by car make and model).
If I get downpipes with 200 cel cats, I intend on getting a stage 2 tune. However, I do not want to be forced to reinstall the factory downpipes when I flash the ECU back to stock for emission testing in a few years (testing where the car will fail if a CEL is on or where a tune bypasses/disables an O2 sensor).
Any constructive input is appreciated.
If I get downpipes with 200 cel cats, I intend on getting a stage 2 tune. However, I do not want to be forced to reinstall the factory downpipes when I flash the ECU back to stock for emission testing in a few years (testing where the car will fail if a CEL is on or where a tune bypasses/disables an O2 sensor).
Any constructive input is appreciated.
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2020 GLC 63
Last edited by 18bora; Apr 12, 2020 at 01:30 PM.
