O-2 Sensor locations

[bc1025]

Hi, sorry if asked. I have found the front and the rear sensor (By the oil filter) and (By the Cat) but at a loss where the other two are. Please help.

 

[jayro]

Hi, sorry if asked. I have found the front and the rear sensor (By the oil filter) and (By the Cat) but at a loss where the other two are. Please help.

There are only 2 on the Gen 1/2 SHO's. Sounds like you got them both.

 

[SHOtime2511]

Yeah,OBD 1 vehicles only have o2 sensors before the converters.
OBD 2 (96 and newer) have sensors after the converters also.