I saw that, but all the examples were for the 4 pin sensor. I have the sensor already mounted on a pcb and I think the pull up is on the pcb. I could be wrong and I’ll do more research to make sure. Thanks for the input!!
Put a 4.7K ohm pullup resistor in the circuit and it now works fine. Many thanks. Wonder why the Arduino didn’t need a resistor. Strange.
Thanks msfujino for all your help, you may have saved what little hair I have left! 
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