I have this fault on my car, I cleared the dtc and it re-appeared. I have done a search and seems a common problem and people replacing the n80 valve but a lot of people continue having problems and they don't seem to fix it 100% then end up just leaving it, so before replacing parts for the sake of it my question is can you physically test the n80 valve? If assuming I should check the pipes for splits, any other advise would be appreciated
