One problem related to engine turbo-charger has been reported for the 2000 Volvo S80. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2000 Volvo S80 based on all problems reported for the 2000 S80.
Shortly after my vehicle's 60k mile service, I noticed slight hesitation while crusing around 60 miles per hour on highway. Once I experience the hesitation, the enginer service light would come on then the "engine system service urgent" message would come on as well. When the hesitation starts, I would feel as if I no longer have the full control of the gas throttle as it does not respond at all. Eg. When I take off my foot off the gas pedal, I would feel a sudden surge in vehicle acceleration! while waiting to get the car serviced by my dealed to take a look at the problem, the warning lights would come and go. Finally, during my trip to get my car serviced, the gas throttle stop responding thus the car cruised to a full stop. I was able to restart the car after about 15 minutes and continue with my journey. Later I was told that I need to replace the whole throttle body in order to fix this problem. My concern is why this problem was not detected during my "major" tuneup service about 3 weeks prior insetad,I had to make a separate trip to the dealership and potentially get into a very dangerous situation while traveling at high speed then to lose the control over the vehicle's gas throttle where it may suddenly accelerate or decelerate.