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**Palf70Step** · 07-14-2018, 05:43 PM

I wish I could help you with ur question. Not sure, but normally all O2 sensors are their own thing, not a backup for another. Been a Long time since I had a truck with that configuration so I don't remember any specifics.

07-14-2018, 05:43 PM	#3
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 46,611	Re: Oxygen Sensors I wish I could help you with ur question. Not sure, but normally all O2 sensors are their own thing, not a backup for another. Been a Long time since I had a truck with that configuration so I don't remember any specifics. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!