1994 Mazda b3000 O2 sensors

1994 MAZDA B3000
175,000 MILES • 6 CYL • 4WD • MANUAL
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TURBOACC
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I recently bought this truck and failed a state emissions test. I replaced the spark plugs, wires, cap and rotor, did an oil change, and bought O2 sensors. The salesman at NAPA told me this truck has 2, but I can only find the O2 sensor on the exhaust manifold by the transmission. Is there another, and if so, where is it? Is there anything else I should do to pass emissions?
Aug 31, 2009 at 9:26 PM
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MERLIN2021
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There is always 02 sensor(s) B4 the cat, and one after the cat, check for a connector there that's not connected, see if there is a steel plug screwed into the cat or the pipe right behind it, someone may have removed it.
Sep 1, 2009 at 2:40 AM