where are the O2 sensors

[mikeybonner]

I have a 2000 Silverado, I need to replace O2 sensors, i can only locate the one before the cat and after the cat, where are the other ones?

[maddog]

i think there is another one on the bank 2 exhaust manifold (passenger side)

[maddog]

let me know mikey

[junior3382]

Actually, there should be one on both exhaust manifolds. I think there afe four all together.... or am I way off?

[z07]

Originally Posted by junior3382

Actually, there should be one on both exhaust manifolds. I think there afe four all together.... or am I way off?

In a true dual exhaust system there would be four, two pre-cat and two post-cat. If there is only one cat then there would be three O2 sensors, one per manifold and one post cat.

So, no. You're not "way off" at all.

[junior3382]

Originally Posted by z07

In a true dual exhaust system there would be four, two pre-cat and two post-cat. If there is only one cat then there would be three O2 sensors, one per manifold and one post cat.

So, no. You're not "way off" at all.

I know on my truck, I have one on each manifold, and one right before the cat, and one after. now I have two inline converters, but it is a single exhaust system. That was my reference point. Personally I think it is unecesary to have that many anyways, but if "they" say it is needed then who is to argue, right? LOL.