Catted down pipes and Check engine light

[BangBang]

Are catted down pipes throwing CEL?

 

[TXRaptor]

If you get the cats with 200 cells per square inch, they will throw a CEL. The 400 CPSI cats do not.

 

[BangBang]

Thank you.

 

[SexyAvalancheGrey]

An O2 extender will fix the code with catted down pipes. SPD offers them.

 

[Onemoosehorn]

An O2 extender will fix the code with catted down pipes. SPD offers them.

Yep. And they worked for me!!

 

[Nick@Apollo-Optics]

SPD Adapters and SPD Downpipes = NO CEL
SPD Adapters and Kooks Downpipes = CEL; Add O2 Extenders
Stock Adapters and Kooks Downpipes = NO CEL
Stainless Works Downpipes = CEL; Add O2 Extenders

Hope this helps!

If you'd like to explore your options, please let us know if we can help!

 

[BangBang]

Thanks everyone!

 

[Booth9999]

Any down pipes sold in CA

 

[Nick@Apollo-Optics]

Any down pipes sold in CA

Unfortunately, no. Under CARB rules, you cannot even swap out catalytic converters unless yours are proven defective. As in, CARB won’t even approve any “high flow cats” regardless of whether or not they can actually still do their job.

 

[SilverBolt]

Unfortunately, no. Under CARB rules, you cannot even swap out catalytic converters unless yours are proven defective. As in, CARB won’t even approve any “high flow cats” regardless of whether or not they can actually still do their job.

Technically that is a 50-state federal emissions law. Cats cannot be removed or replaced for 5yr/50k miles unless found to be defective.