Hey guys, i just replaced the after cat 02 sensor on my 00 z24 like 2 months ago and i just got another CEL and guess what it is?? the precat 02 sensor lol. Where exactly is this located im guessing under that heat gaurd or whatever it is and if so is it reachable or am i going to have to take other things apart to get to it or jack the car up? Any info or pictures on what to do is appreciated, thx

Under the heat shield. It is the o2 before your cat.


Tach Out Motorsports
Option D Inc.

just take off the heat shield and bang its right there, you'll need a 7/8 wrench, use the box end of the wrench. it takes like 10 mins to do. hope this helps