Several electr. Errors always when it’s wet outside

Hi The lagoon of my parents-in-law has several non-specific errors. It happens every time it’s wet outside…then comes… -Checking the sharpening system -Airbag error Airbag goes away alone again…the relatively fast…then comes back and goes again. Injection system comes at the self-test…you have to start and make out…then he’s gone. He was at Renault directly…no one knows what it is. Do you have any idea? Is the 2.0 with 140 hp petrol