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o2 sensor question.

This is a discussion on o2 sensor question. within the External Engine forums, part of the LSx Technical Help Section category; Well I dropped my car of to a buddy who has one of the top of the line 8000 dollar ...

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    o2 sensor question.

    Well I dropped my car of to a buddy who has one of the top of the line 8000 dollar scanner blah blah...he diagnosed it as o2 code bank 1 sensor 2...is this drivers side after the cat? Also I assume I shouldn't have a problem changing it out with some ramps and hand tools right?

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    Sensor 2 is after the cat, and Bank 1 is the driver side. That sender only tells the PCM is the cat is working. Could be a blown heater circuit, a bad sender or an issue with the cat. The sensor has absolutely nothing to do with your car's fueling, so unless you have a cat going bad you can ignore it without any adverse effects other than a light on your dash.

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    Well....I guess I won't worry about the o2 sensor...how does one check a bad sender or blown heater circuit?

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    From what I've read if it's a heater circuit I'd get that code on the PCM read...maybe the sender is the issue.

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    You can check the heater circuit with a multimeter. Two of the four wires are the heater circuit and you simply unplug the sender and check the sender's wires for continuity.

    By way of example, these Bosch instructions give you the color code near the end: http://www.vaglinks.com/VAGLinks_Com...orInstall2.pdf

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    Can't I just buy a while new oxygen sensor?

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    Yes. But it could be an issue with the extension harness. I always try to diagnose the problem before throwing parts at it.

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