Quick Oxygen Sensor Question..

[Da Dark Jedi]

I have a NTK O2 sensor for my 1997 Q45, rear one. I'm going to attempt to replace this weekend because the SES light ( CEL ) is on. When this is replaced does the light go off after driven for XXX amount of miles or does it have to be resetthru the OBDII port? What device will I need to do this? The dealer wants $125.00 just to reset alone. At his price a Insy will replace for $75.00 and I won't have to buy the removal tool. Advice PLEASE..

[superuber]

If your going to do your own work buy yourself a scanner and save yourself hassle and money. A junk scanner just to pull codes is dirt cheap. Be the best DIY'er you can be-use your head.

[Lokim]

Or just stop by Autozone, O'Reilly's, etc. and they'll clear it for free...

[Da Dark Jedi]

If your going to do your own work buy yourself a scanner and save yourself hassle and money. A junk scanner just to pull codes is dirt cheap. Be the best DIY'er you can be-use your head.

I understand what you said... but you still have not given me ANY recommendations as to a scanner to purchase. Brand & model, or better yet what scanner do you use? Second is it necessary to clear the code or will the code clear after driven for XXX miles.

[Lokim]

On OBDII (On-board Diagnostic Gen. Two) systems (which is what you have, all cars 1996 and later do) the CEL sets on what's called two-trip logic. That means that if the same problem is detected on two consecutive complete drive cycles, the CEL will illuminate.

If it is not turned off with a scan tool, the computer will shut off the CEL after not detecting the problem for anywhere between 10 and 30 drive cycles. So in short, yes, it will turn off by itself, but it may take a few days to a few weeks depending on your driving habits. If you're curious as to what the OBDII drive cycle is, Google it.

As far as scan tool brands go, any OBDII-compliant one will work, regardless of brand. If money is tight, go down to Harbor Freight and buy their cheapest one. If convenience is an issue, grab the cheapest Actron- or Equus-branded one from your local auto parts store or online.

[Da Dark Jedi]

Thanks Lokim, just to be sure is this what you mean? Here's the link below for a 97 Q45 which is my car.

http://www.horsepowerjunkies.com/forums ... hp?t=94229

[Lokim]

Close enough. That drive cycle that is shown is actually for GM vehicles. Just drive it as you normally would, the light will go out.