Temp sensor fault

[Phil pendy]

Hi my 2020 man tge is playing up comes up with cooling temp fault had it replaced with genuine part
Still the same it drives fine but temp gauge up and down to zero then says overheating but it’s not all sorts of warning on dash
Esc fault
Hill assist fault
No cruise control
Main cooling fan on all the time
Would be really glad of any ideas

 

[TonyL]

Have you had a rodent under the bonnet?