i have got a 1998 nissan quest and i just replaced the oxygen sensor and the check engine light will not go off. i had it checked and the code is coming up p135. is there a fuse for the o2? if so where is it located?

on this model year there are two oxygen sensors you probably replaced the one close to the engine mount but there is another right after the muffler right in the middle of the van and there is no fuse for oxygen sensors also check the wires .

on your year Quest, the reason for the O2 sensor code, is not cause of a sensor failure. The wire to the O2 sensor is broken. The O2 sensor by the front engine mount is known for the wire to break for the O2 sensor. Inspect and repair as needed. GL :)