I ran a buzz test the other day and got an IDM code the first time I ran it. The next few times no codes came up but "unable to complete test" came up. I scanned with AE and it shows "test successful" and no codes. I repeated this several times. It appears the buzz test does buzz the usual 9 times with both devices but the scangauge shows "unable to complete test" at the end of the test when it does not show a code. Can someone check their gauge for me and see what they get? Thanks.