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Those network errors (U codes) are historic faults which means they are not current codes. So ignore those for now. They are common and can come from a number of sources. Usually power fluctuations from starting the car and things like that.
Since you have replaced the sensor I would look next at the reluctor ring as they can get rusted up or damaged and change size which can also cause these type of errors.
I have attached a TSB that is for Land Rover but note that code your getting has 2 other digits that can change the meaning of the code. Aftermarket scanners will generally only pick up the base code of C0034. So there might be a deeper code too.
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