Service engine light on 1991 Mazda B2200

[George]

My dad’s Mazda truck’s “Service Engine” light has been on for some time. He thought it was due to a faulty oxygen sensor, so he asked me to change it. I did. Then I disconnected the battery thinking it would cancel the “Service Engine” light. It didn’t. Could anyone tell me how to cancel the light or perhaps suggest what direction I should go in dealing with the light other than taking it to a dealer? Thanks
George

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[college man]

here is the procedure for pulling any stored codes.

http://www.garagejournal.com/forum/showthread.php?t=160700

[Author]

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