I have a 1993 ford taurus 3.8L V6 automatic GL. I retrieved this code from my car: code 634, manual lever position sensor voltage higher or lower than expected or A/C on. I got the code from a "innova ford OBD 1 digital code reader." What does this code mean?

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Originally Posted by russharv63

I have a 1993 ford taurus 3.8L V6 automatic GL. I retrieved this code from my car: code 634, manual lever position sensor voltage higher or lower than expected or A/C on. I got the code from a "innova ford OBD 1 digital code reader." What does this code mean?

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Here's the pin-out tests for that code:

Attachment 6235

If the tool you're using doesn't align, you will probably need a new switch.
Otherwise, further close inspection and hands-on diag will be necessary to be certain.