Repaired / cleaned the PCV circuit as I saw a lot of oil in the pressure circuit (also see my previous post: https://www.ducked.nl/blog-entries/volvo-s80-2-4t-dirty-clean-turbo-coldside/ ).
Did a little research and the PCV system is almost always the culprit for such issues.
Decided to buy a complete system although ended up cleaning the existing system and only replacing the oil seperator. The tubing was quite some work, I will save that for another time.
As a lot of older Volvo’s, my S80 showed the cumbersome “Alarmservice needed” message. I decided to search for a fix instead of buying a new one, which costs about €280 – €300, which is a lot of money.
The process is very simple, slicing open the siren, disconnecting the battery pack and plugging in the new battery pack. The hard part is to remove the security bolt, I used a angle grinder and then tapping it out. I used a normal bolt when I mounted the siren again.
I bought it here: https://www.ebay.com/itm/152151139597
S60, S70, V70, S80 & XC Series
Type: Varta button cells
Rating: 7.2V, 320mAh
P/N: GP320BVH6A6, N2H280
Finish: Green wrapped
Connector: Mini-Volvo connector
Compatible with 8637399, 8622268, 9452709 & 9162941 siren modules
Cable length: 60mm
I noticed some strange behaviour when lifting the throttle and decided to service the CBV aka Compressor Bypass Valve. I was right, car drives a lot better after replacing it with a fresh CBV / DV (Diverter Valve).
I went with an aftermarket TRITDT K5T09671.