Hello everybody, I can't find thread for introductions and I'm a DS owner not a RR so I'll write here. I found this forum looking for a similar issue to the one I have and stumbled upon "ABS Module fault?" post.
The issue that I have is that when it's hot outside (around 30°C) even lower if the car is left on the sun, I get messages shown below, my temperature reading goes to -30°C or more and I lose A/C. Scan showed a outside temperature sensor is faulty so I changed it but it  didn't cured it.
I cleaned all the battery connections but again it didn't help.
Next thing I want to do is to clean all the grounding points. I located one closest to the battery but couldn't unbolt it, will sort that after removing plastic bit which is in my way. Does anybody know where are all the others grounding points or did anybody else have this issue and how did he solve it? Also, can I put non-AGM battery just to check if it's a battery issue? In a previously mentioned post I saw this @Mikey guy who seems knowledgeable about the RR similar issue, maybe you work on DS as well? 
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There is a known fault with DS and Evoque that needed a software update from the dealer, to fix outside temperature reading -30 etc.
Search for DS forum UK they should have more info on the matter. 2018 SE SDV8 4.4 Byron Blue

As Kot says, better off asking on the Disco Sport forums. UK one is here -

https://www.discosportforums.co.uk/forums/

Good luck  2021 D350 Fifty Edition - Carpathian Grey
2017 4.4 SDV8 Autobiography (2021-2024) - Santorini Black
2012 4.4 TDV8 Westminster (2016-2021) - Santorini Black