It could well be the culprit and no it does not show up on VCDS or at least not on PF. My S8 was heating up to 120C and slowly loosing coolant through the cap couple of years ago in slow traffic. It turned out that electrical fan had failed and valve was stuck in coolant reservoir cap letting the pressure and coolant to escape when getting too hot. Second hand fan and new Febi cap later normal service was resumed.
__________________
Currently 8less
2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D
8 history:
2006 A8 Sport 4.2TDI quattro SOLD,
1997 S8, reached end of life with gearbox failure
|