Question about 1996 Ford Explorer

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Oxygen sensor(s) got engine light, ran diagnostics, said it's an oxygen sensor....mechanic said there' more than one. how to find the one that's bad

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Most times the O2 is not the problem but just the symptom of another problem, most times a vacuum leak, let me have the codes the engine u have an the miles on the car and i will let u know whether the O2 sensors are defective, there are 2 O2's, they are just before the catalytic converter, the sensors after the cats is the catalyst efficiency monitors, 2 of them.

Posted on May 21, 2009

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o2_heater_circuit.gif

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