Hello With my wife’s car, the yellow engine light went on with her XC60 D3. Because the way to the next workshop is not so easy, I connected a tester, got the message “P04D9 Drivetrain”. This leads to problems with the AGR. Whether the new cooler was installed here already, and whether the software at the last stand is devoid of my knowledge. The car is 03/2016 and had 35tkm after a year on it. At present it is 52tkm. So he is almost 3 years old. I deleted the error and drove a lap. At the same time the error did not occur any more. Is this normal? Blöd now, of course, if I will present it now without obvious problems at the workshop …. Another idea: Just before the error occurred my wife had taken a few meters with her when reversing a tilted mist bucket (mulley for all not Austrians). Maybe something was damaged there? Can’t imagine it, but who knows? Am grateful for tips!