In a message dated 1/14/2000 7:01:35 AM Pacific Standard Time,
rclutter@bellsouth.net writes:
>The code is 21, which means a problem with the o2 sensor. I noticed in the
>Haynes manual that it says that this part should be replaced at 50k miles,
>well the truck just rolled over 50k and the light poped on, coincidence?
>
>Anyway, is this something thats releatively easy to replace? The book says
>it on the exhaust somewhere I havent looked yet, where is it?
>
>And, where can I buy one, will this be at the parts store? or a dealer
item?
Rob,
What year is your truck? From what I've read on these boards, the '97 and
later use two O2 sensors, one on either side of the cat. Mine is a '94, it
only has one, and replacing it couldn't be any simpler. It's located on the
top of the exhaust pipe, just after the "Y" junction and in front of the cat.
It unplugs from the wiring harness on top of the trans, and then you unscrew
it from the pipe with a wrench. A decent one (I got a Bosch) comes with
pre-lubricated threads, the wiring and plugin connector, and it set me back
about $65 from Kraegan Auto. I didn't even have to jack up the truck. At
stock height, there was enough room to crawl underneath and change it in
about 10 minutes.
Hope this helps.
Scott
'94 318 - 15.24 @ 89
<A HREF="http://members.aol.com/McKennaRacing/">McKennaRacing.com</A>
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