transmision speed sensor out of range code 1501 on 1997 Ford Taurus

Where is this speed sensor at? Some times it won"t shift into second,sometimes it shift all the way up till overdrive.weater temperature or the engine temperature makes any difference

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2 answers 1 comment
some timesit wont sttiff into seconds.
Hi,
Did you find out what the problem was? Was the speed sensor bad?
Thanks
I replace the speed sensor and it work.still running.
Thank you.