0141 and 0138(which could be a short). Wires look good from sesors to plug. Going to replace them. I looked at a vid for a '01. They showed 4 by the manifold. I have 2. 1 before the large cat and one after. Looks like the upstream ones by the manifold have been plugged.


bottom pic is from underneath..

 

Mine are further down the pipe and in the open, thankfully..

 

What would be the best replacement? I've heard NTK, Bosch, something else?

 

You have a Federal Emissions '00.
So the one at the bottom of the Y pipe is your upstream, last shot, and the second to last shot of the one behind the cat is your downstream.
Those 2 plugs in the exhaust manifolds are supposed to be there.
A CA Emissions '00 like mine has four.
With that dual front cat set up.
In mine the Upstream 2 are in the exhaust manifolds and the downstream 2 behind the dual front cat.
Just like the '01 you were looking at.
Nothing but NTK's.

 

Thanks for the info. Glad I don't have 4. Much easier to work on. Now if a brick and mortar carries them. 3 auto parts store in a small town....

 

...

 

Use heat when removing them. Either drive it for a half hour, or use a propane torch around them. Makes a huge difference.

 

One came out fine, the other I put a torch to it. One store had them. Not cheap, $120 for the pair... NTKs