o2 sensor 98xlt 4x4 sohc, quick question

[astrochimp]

My engine light is on because of a slow acting o2 sensor.
I'm going to replace both.
Are mine before or After the cat converter?
There seems to be a price difference depending on where they are.

www.partsamerica.com

THANKZ

 

[Glacier991]

If the check engine light is on and you know that it is a slow 02 sensor, the code should have also told you which one. I am not aware that a post cat sensor can throw a slow code, they aren't supposed to crossover at all. So your "slow sensor" would be one of the upstream (pre-cat) sensors.

 

[astrochimp]

If the check engine light is on and you know that it is a slow 02 sensor, the code should have also told you which one. I am not aware that a post cat sensor can throw a slow code, they aren't supposed to crossover at all. So your "slow sensor" would be one of the upstream (pre-cat) sensors.

How many do i HAVE?
autozone hooked up and read that the drivers side O2 was slow responding.
Didn't remember if he gave me a location for the o2 sensor though

 

[Kinnish]

You have 4 O2's. 2 before the cat and 2 after. The one's that go bad the most are the one's after the cat. Just get some Bosch's at Autozone and rent their O2 tool. I've done it twice on my 98.