Technical Throttle Valve Control Unit

[MashTash]

Good evening all, looking for a little help and understanding of my little Fiat 500 2014 engine management codes please? On way back from a journey to the S.West at the weekend my car started to go into idle mode after the orange engine management & warning light appeared on my display. So pulled in a safe space on a lay bay and called the AA. AA man did a full diagnostic check and on display the following codes appeared;
P0106-Atmosphere/Intake manifold pressure sensor. Signal change rate above limit value.
P1120-Throttle Valveosition signal calculation not OK
P1683-Throttle valve control unit:Malfunction during adaptation specified position not reached.
P1687-Throttle valve control unit:Malfunction during adaptation unexpected operation. Any help or advice would be greatly appreciated thank you Tash

 

[MashTash]

Will be booking into the garage for repair and just need a little advice on possible repairs and if it’s going to be a big job and costly thank you