Guys, i eventually got around to looking at this fault again. I discovered after a day of messing around. The input value must be showing valid, before saving and moving on to the next wheel. It maybe just shaking the car will adjust the sensor to a valid reading. Or, in my case I had the jack up rear right, to allow the wheel to raise and fall, before getting a valid status.
I hope this helps others.
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2003, A8 D3 4.0 TDI
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