Check Engine light

[kanga80]

Hey all, so I just had my dreaded check light come on. On Friday night I picked it up from the local performance shop with Kooks LT headers Corsa Xtreme exhaust. Does anybody have any idea what caused it? my Mustang has just shy of 10K miles?

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[Falconetti]

Hey all, so I just had my dreaded check light come on. On Friday night I picked it up from the local performance shop with Kooks LT headers Corsa Xtreme exhaust. Does anybody have any idea what caused it? my Mustang has just shy of 10K miles?

catalytic converter removed?

 

[2015 Silver GT]

What's the code?

 

[kanga80]

catalytic converter removed?

No, I live in NC nd you have to have a cat to pass inspection.

 

[kanga80]

What's the code?

I re-ran/installed the tune so it cleared the codes, but they were P0420 & P0430

 

[Legionofone]

Cat issue, basically the high flow cats aren't cleaning as well as factory cats.

 

[Chef jpd]

Those are both catalytic converter codes, both banks.
Did you just reinstall the oxygen sensors if are you running defoulers?
They will probably show back up.

 

[kanga80]

Cat issue, basically the high flow cats aren't cleaning as well as factory cats.

I it a negligible issue? or something I need to address immediately?

 

[kanga80]

Those are both catalytic converter codes, both banks.
Did you just reinstall the oxygen sensors if are you running defoulers?
They will probably show back up.

I am not running defoulers.

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