o2 sensor 1994 pontiac GP

[rockfangd]

Hi everyone i am working on a 1994 pontiac GP coupe 3100 v6.

The vehicle keeps running aweful and when i pulled codes one stated that the o2 sensor is either open or shorted so i want to put in a new one. Heres the problem, i guess there are 2 upstream sensors on the GP, which i do not understand because my 94 cuttys only have one

My question is where is the second o2 sensor located. I know one is behind the engine between the firewall but does anyone know where it is located. Thanks to all in advance for the help

[Andrew]

who says there is two?

[rockfangd]

rockauto, advanced auto, federated auto, only for the GP though, not the lumina or the cutty. This does not make any sense at all to me because the code scanner doesnt say ban1 or bank 2 which made believe there is only one??? i also cannot find the wirig for the second one and all i know is there is no downstream only 2 upstream

[Robby1870]

There are not two upstream O2s. Trust your eyes. I did see on Advance's website on some O2s say two required, while others say one. Anyway, there is 1 upstream.

[rockfangd]

why would they ever say there would be 2. what the hell would be the need for 2 and wouldnt i at least see the plug? it is big enough.

[cutlassdude96]

if your car did have 2, it would be behind the cat converter but thats only on OBDII cars 96+

[runt]

if your car did have 2, it would be behind the cat converter but thats only on OBDII cars 96+

 

Ding Ding!

[rockfangd]

well i am going to just say there is one.