1997 Sable Cam position sensor

I have a 1997 sable that interminantly wont shift out of 1st. The onl code stored is P0340, Cam shaft sensor position malfuction. Tach work . MIL light on. Also doesnt want to shift into overdrive
Does this make sense? or should I be looking for a Transmission sho
for replacement of the tranny

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