An engine warning light appeared a few weeks ago on My 2.0 Mk4 GTI. Got it on the diagnostic machine which said it was a Lambda sensor, specifically Oxygen sensor 2. I got it changed at the garage and it was ok for a few days but its back now and had the fault rechecked on the Diagnostic and its the same fault. Am I just unlucky and its away again or does any know of any other occurences of this?
