Replaced O2 sensor for a bosch new one. Since then i've got check engine light. on 1990 Mazda B2200

The old O2 sensor didnot give me check engine light.But the new one did it twice then turns off when I park re-star my truck again. Any advice what can I do ??? A friend of mine told me BOSCH works better with european car. He says I should get a nipondenso instead. I just changed the old O2 sensor cause black smoke problems.

Asked by for the 1990 Mazda B2200
it could be a defective sensor or the wires are burn't on exh. bosch is a good sensor. is it the right one for that car? is the right one, it has only two wires (gray and black) same colors as my old sensor.Dont know what to do.
you may have a circuit issue instead of a sensor issue seek help from your mech
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