[pxjdream]

My 1997 escort has a trouble code: P0133 which shows o2 sensor need to be replaced.

I know the location of this sensor is on the front of exhaust manifold, but I dont know which kind of sensor I should buy?

POST CATALYTIC CONVERTER or PRE CATALYTIC CONVERTER?

Any ideas? Thanks!

 

[madmatt2024]

Pre catalytic. Its the one with the shorter wiring harness. I have heard the only difference between the two is the harness length.

 

[marclar]

the only difference between the two is the harness length.

+1

 

[97DragScort]

correct - the read values are the same - a universal is the cheapest route and only requires a splice to harness connector.

 

[Panameno]

you can buy a universal O2 sensor like 97dragscort says with or without connector.

i bought mine last year, STANDARD brand.