Muffler mod engine light

[JHoughton]

Hello I just took ownership of a 21 Bighorn/Lonestar and plan on putting a Flowmaster super 10 on it - my question is if I do that and maybe delete the resonators will I have a check engine light? Thanks for the help.

 

[vincentw56]

No

 

[Bretth]

No the only time an exhaust mod can trigger a CEL is from messing with the cats.

 

[UnloosedChewtoy]

Hello I just took ownership of a 21 Bighorn/Lonestar and plan on putting a Flowmaster super 10 on it - my question is if I do that and maybe delete the resonators will I have a check engine light? Thanks for the help.

No the only time an exhaust mod can trigger a CEL is from messing with the cats.

Pretty much. If you mess with the oxygen sensors or cats/pre-cats, that may trigger a CEL. Changing the muffler, if done properly, will not trigger the money light.