calling all car mechanics

I have a question in regards to a 2003 chevy venture. Where are the oxygen sensors located and how do I replace them? Is there a schematic showing the wiring details for each sensor and if so, where can I find it. thanx.

your best bet is to buy the factory service manual for the vehicle.
the manual will contain all the wiring diagrams as well as detailed instructions on replacing and testing all your sensors.

yeah.. told my father in law that, but he's not going to listen to that easy advice :P, so I figured I better get some knowledge and let my husband fix it for him... before he goes crash or something.

should be in the exhaust manifold
looks like this http://www.autopartswarehouse.com/po...Ugd2FycmFudHku

Your O2 Sensor should be located just before the catalytic converter.

Depending on the car, there could be several. Check the exhaust manifold right after the engine, also check right before and right after the cat. Best of luck!

We know there are two sensors.. I know one is after the cat convertor, but the other one was eluding us... thanx for the link too. hopefully we can get it fixed. :D ugh now to get my truck fixed... nothing like losing a tire while driving.. :rolleye2:

Any questions, please feel free to PM me. I work at Hyundai, but we have resources to any make or model.

http://i64.photobucket.com/albums/h1.../103108254.gif


Maybe this will be big enough so you can read it.


Edit, it's H02S1 number 6.

And you shouldn't have to wire anything, you should be able to get a stock O2 sensor and have it plug in where the old one was.

Depending on your skills with a soldering gun buying a OEM replacement might not be worth it. 02 sensors are not a cheap part. If you understand wiring diagrams I'll be more than happy to send you those. If not, mixing the volt wire and the heating element lead would be a big headache. OEM is the easiest and from my small experience with a 3400 a plug and go sensor might be best. This guy looks like a huge pain to get to.