Thing is, if you know the basics about DTCs and how they are raised, understanding DTCs becomes MUCH easier.
At the end of the day the ECUs can only determine a few things, is the signal plausible (within a defined range), is it open circuit (broken connection somewhere), is it connected to ground, or is it connected to battery.
The DTC states that the interface shows the connection is seeing a voltage which is at, or close to, Vbatt (battery voltage).
Now a short to batt is almost impossible within a sensor, it can only really occur in a loom.
What's the betting garage one were fixing something and have, as a result, stuck something through the loom and its shorting to Batt voltage or they damaged the loom and its doing similar.
I would expect there to be only three or so wires to the cam sensor so hardly a large number to check (and easy to measure with a DVM whilst measuring for resistance to battery)