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Where is the O2 sensor on a Ford Explorer and can a backyard mechanic replace it?
There are 4 total oxygen sensors on a Ford Explorer. Two of them being before the catalytic (Pre-cat, closest to the front of the vehicle), and the other 2, after the catalytic (post-cat). You have to first figure out which bank the bad reading is coming from, then you have to determine if its post-cat, or pre-cat, most autoparts store will be able to tell you if your "CHECK ENGINE" light is on. ?ake sure when purchasing an oxygen sensor for your explorer, that it is HEATED, otherwise nothing will match up underneath. There are 2 sensors between the converters and the manifold. Also, between the catalytic and the muffler. Hope I could help!
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