Posted: 9/18/2007 4:19:47 PM EDT
| I posted this question in the Cars & Bikes forum, but some of you locals may have more specific advice. Thanks in advance for any insight you can share. |
 The O2 sensor looks like a spark plug sticking out of the pipes and is as easy to replace. Find the wires (2 per side for a V8) that are hooked to your exhaust pipes in front of and behind the Catalytic converters. One will usually be way up at the end of the exhaust manifold where it bolts to the exhaust pipe the other just behind the Catalytic converters. Unplug, unscrew, replace, reconnect, done. |
I think you received valid advice from the other thread. They didn't hook anything up to my computer when I had a recent smog. If the light is off and your emissions are OK, you will pass. |
| That's funny. It's like deja-vu. I had the exact thing happen to me recently. My 96 4Runner check engine light was turning on and off (more on than off) a month prior to emisions test which was due 3 weeks ago. I was told they won't pass me if the check engine light was on. I decided to reset it but it came back on the next day. I went to Autozone and they ran the codes for free. They came up with 4 possible problems with a new gas cap being the 1st on the list. They reset it and I bought a new gas cap. It stayed off for a couple of days so I brought it in for testing. They hooked it up to their computer and before I could finish filling out a check to ADEQ, they told me to pull forward. It passed!!! I hate going to these things because there is usually a lot of waiting but this time it took less than 10 minutes from when I drove in the driveway and when I left – luckily no line in front of me. The funny part is 3 days later, the check engine light came back on and is still on today. |
 Not sure your point, but this does vary by manufacturer. The ones I have replaced were held in by 2 bolts. No biggie, either way. |