Question about 2002 Toyota Highlander

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  • Anonymous May 22, 2009

    Need to replace o2 sensor. Diagram for location and replacement



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There are three sensors in your vehicle, assuming you have the V6, and have a model from 99-06. Two are located in a Y joint by you manifold under the hood, and the third is located behind your catalytic converter. The first two are called upstream, and the latter downstream. To disconnect the upstream, you simply need to trace back the wiring assembly to disconnect, and then use the sensor adapter for your 3/8 socket to remove it. You can get these sockets almost anywhere- I got mine for 12 bucks from Lordco. You need to make sure that you get your computer reset after replacing the sensor- I had a buddy at a shop do it- it takes 20 seconds, and I find a six pack helps lubricate the transaction.

Posted on Sep 04, 2009


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