Throttle Body Magneti Marelli - Volvo v70 2.4l 140bhp

[ashleyg82v702001]

Hi all, I keep getting a P2101 error code.
(Throttle Actuator A Control Motor Circuit Range Performance) THIS IS AN INTERMITTENT ISSUE.

my v70 has the Magneti Marelli throttle body. Been looking at possible replacement, £600 is a bit excessive. There is a company in UK I've found that remanufacture them with new contactless possition sensors etc but will only deal with trade garages. My question is, are there any other problems that could generate this code before I invest a large sum of money.
Or is there away to help the computer learn new / retrain parameters for the throttle?
When I turn key to possition 2 sometimes (when the error occurs) it throttle flutters and claps uncontrollably for 5 or so seconds

[oragex]

It seems there is a chance to install these without software upload IF the software version matches yours https://volvoforums.com/forum/volvo-v70 ... are-44999/
Some tried to repair it viewtopic.php?t=38504