Ambient air circuit

My Nanocom is showing ambient air circuit fault and reads ambient air pressure very high or low if disconnected. Do I have to buy a new one and if I do where can I get one at a good price.
The part is MHK100600

Plenty of options here in the UK if you google the Pt No, don't know about Spanish availability that would be down to you. Could see if there are any breakers as it looks like it is fitted to vehicles other than LR. If the reading changes when you disconnect the sensor that is a good sign that the ECU and wiring would seen to be ok. Don't know if they are a common failure item, if they are and you go to a breaker it may be worth taking your vehicle and Nano to try it at the breakers to be sure you get a good one.

not that many TD5 here in spain or Rover cars etc. So would be difficult sourcing one from a scrap yard here.
Good Idea about taking along the nanocom to test it out though, thank you