I'm just curious what if I bought an o2 sensor for bank 1 sensor 2 and a mechanic made a mistake by putting it in bank 1 sensor 1.. are both sensor 1 & 2 similar?

 

both precat O2 sensors are the same its the one after the cat. converter which is different. If you change one precat O2 sensor 99% chances are the other one will soon follow

 

What year is your car? Cali or Fed?

Best I can tell, the upstreams are all 3 wire, downstream is a 4 wire. How would he have plugged it in? Unless it's a universal, in which case he should've noticed the difference.

But no, if it's a postcat sensor, they don't operate the same as the precat sensors do.

Why wouldn't you just swap it back to how it should be? And you didn't by chance mean B2S1 instead of B1S2, did you?

 

yeah we'll see what i will tomorrow morning and yeah im pretty sure i said bank sensor 2 i even gave him the print out from autozone.. so wait b1 s1 and s2 are basically the same right?

o yeh i have a 99 and its fed..

 

O yeah my mechanic also determined sensor 1+2 by the length of the wires.. are the wires diff lengths?

 

No, they aren't. Did you even read what I posted above?

IIRC yes, by a few inches. B1S1 and B2S1, that is. I think you keep confusing B2S1 and B1S2.

 

Lol.. yeh I think I do keep confusing them..

 

What are the Color codes for the 3 wire sensors , from the car side? I have a universal on order for the right bank of a 97.

 

R/B, L/Y, W. EC-148.

 

can you clarify, what colors are designated from the car for;
1. Signal
2. Ground
3. Heater

thanks.

 

No, but the FSM will. Link is in my sig...

 

problem solved BTW.. i jus took money out of my piggy bank and replaced all 3 o2 sensors! oh yeah i was right btw.. the guy replaced the WRONG o2 sensor so he didnt charge me witht he service! =)