P0420 Catalyst system efficiency below threshold ON 2 Catalyst ´
(See DTC P0420 )

I got this CEL Around hmm yesterday ? and does that mean my Cat (Air Purifier) going to fail (or already failed)

Hmm , will this affect my 8's performance/stability/safety in any way ?

Thanks guys ! :-)

P0420 Catalyst system efficiency below threshold ON 2 Catalyst
(See DTC P0420 ) I got this CEL Around hmm yesterday ? and does that mean my Cat (Air Purifier) going to fail (or already failed) Hmm , will this affect my 8's performance/stability/safety in any way ?

Thanks guys ! :-)
See the related page below from the shop manual for possible causes of this error code. Best to take it to a dealer and have it checked out. They will likely replace the cat. You may notice reduced performance if the cat is failing, but there is no safety concern.

the error cause list says nothing about a failed cat converter, I would clear the code and see if it reoccurs

I havent notice any decrease in performance yet.

Let me reset it and see if it pops back up ....