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NEED TO KNOW LOCATION ON MOTOR OF 02 SENSOR & HOW TO INSTALL

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  • Larry Trisch
    Larry Trisch Mar 17, 2011

    What is the make model and year of your vehicle along with engine size?

  • Mical Caterina
    Mical Caterina Mar 17, 2011

    year & engine size please???

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The o2 sensor isn't on the engine. it's on the exhaust. there's a special socket you can get to change them which has a **** in it for the wires. can also do it with a spanner but be careful not to let it slip and not to round off the nut, which may be hard as is usually tight to get moving due to when the exhaust gets hot.

Posted on Mar 17, 2011

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  • Chevrolet Master
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The O2 sensor is on the exhaust before the catalytic converter, and possibly after it too. Some vehicles have one, some have 2. If you have dual exhaust with dual cats there will be one before both cats.
You need a special socket to replace them. You can get it at any auto parts store, it has a slot in it for the wire harness. Soak you old one down good with a penetrating fluid before you remove it.
If you are needing to replace one take a few minutes to check the wire harness for bare spots or broken wires. Because it hangs under the vehicle it is exposed to a lot and it's not uncommon for the wire harness to end up being the problem. Check it carefully for insulation worn off or corroded terminals(green gunk) and repair any of that you find and see if that cures your problem first. Hope this helps.

Posted on Mar 17, 2011

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Posted on Jan 02, 2017

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