HI Peeps. (58 Sportback TDI 170) The last week or so, I have had ESP/ABS Fault! Flag up on the display, along with both yellow warning lights. However, after about 5-10 mins they clear themselves. If I took the car for a check, would the warning have to be showing for the diagnostics to detect the fault? It is very annoying although it has only done it 3 times. I hate knowing my car has an under lying problem somewhere. Any help appreciated.