Hello,
I have a 2009 Base Vette LS3 with A&A kit w/Meth and just got the P0420 code recently.
Car has 28K miles so I figure I'd just replace the CATs but won't have the funds for a couple months.
So...Was thinking of just disabling the P0420/P0430 codes for now.
I searched a bit but mostly deals with disabling the O2s and CAT tests all together, which I'd like to avoid.
Any side affects of just disabling these 2 codes for now, e.g. will emissions tests go complete, etc?
Also noticed one possible related tune setting change that I'm not sure if it was changed to help avoid this or maybe caused this prematurely?
It's in: Engine Diag/Exhaust/Downstream/Lean Thresh. The stock value was 350mv. The A&A base tune that I started out with has it at 300mv.
Anyone know if this better or worse or not related to P0420?
Searching CF also indicated there was a TSB at some point on these CATs due to tune/setting being too sensitive.
Anyone know if/where this setting is?
Thanks,
Pjs