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LEJ · 04-16-2017, 10:14 AM

Hi, I had the check engine light come on while on the freeway. When I checked via my Durametric it came up with 2 codes: P0420 and P0430 Both say "Short to B+/upper limit/rich mixture Threshold"

Any idea's on how I solve the problem will be greatly appreciated as I haven't a clue as to where to start looking to solve the problem/s.

thanks
Larry

04-16-2017, 10:14 AM	#1
LEJ Registered User Join Date: Jun 2016 Location: Ontario, California Posts: 105	Fault code help needed Hi, I had the check engine light come on while on the freeway. When I checked via my Durametric it came up with 2 codes: P0420 and P0430 Both say "Short to B+/upper limit/rich mixture Threshold" Any idea's on how I solve the problem will be greatly appreciated as I haven't a clue as to where to start looking to solve the problem/s. thanks Larry __________________ Current vehicle - -2001 Boxster S, (sadly all of the following cars are gone) 1973 911T with 3.2 engine, 2002 911, 1975 911S, 1971 911T, 1968 912