98 Chevy Truck check engine light came on...

[Marc]

...So I do a little research and find that I need a OBDII Code Reader to find out what's wrong. I go down to PEP Boys and buy one for $100. Very nice.

It tells me #P0135 - O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)

Now I'm wishing I had a manual. That'll be my next purchase.

I assume I need to replace the O2 Sensor. Can someone tell me where this O2 Sensor is located? Or any references to where I can get more information?

Thanks in advance!

[warrenp]

it should be on your headers/ exhaust manifold or header piper.
either way it's in the front of your exhaust.

get a big rachet! they usually come off hard
a torch always helps too

[mattandleah]

Hi guys. I found a a pretty good web page (www.diydiagnostics.com). I ordered one of the scanners and was able to get the trouble code, fix my car, and shut off the engine light with it. It really worked well! Seems like a pretty good price at $54.99 plus about 4 bucks for shipping. The tool works great. It gives you more control over viewing/clearing codes than some others. Plus, it has a nice length cord so that you don't have to spend time with your head underneath your dashboard. It says it Works on 1996 and newer GM, Ford, Chrysler, Nissan, Toyota, Honda, and some others. No computer required. It also comes with a handy code booklet to tell you what the codes mean.

[chevyguy]

The inexpensive readers just have engine diagnostics. buy the better one , It will have trans codes also. I am pretty cheap myself, But it stinks when you get a trans code to turn on the light, but cannot diagnose it with your scanner. Spend the money

[vanhal]

it is the one on the drivers side before tha cat they have a socket that is great for taken them out bank 1 no 2 is the one behind the cat.
hope this info helps ..........pete