How many O2 sensors on a '96 F-150, 5.0L?
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In 96 It became nation wide that all cars in the US be equiped with an OBDII computer system. an extremely **** emissions monitering system. Which in all OBDII systems there is suppose to be a pre cat O2 sensor(The ones comming off the manifolds) and a post cat sensor somewhere after one of the cats. So I would say there is Three O2 sensors.