Volvo Repair: Various lights go on and off on dashboard, dtcs, vadis

Question
Hello,
I am getting desperate, would really appreciate some ideas! My s80 2.0T, Year 2000, display lights go on and off (emission service, coolant, total break failure). The dealer who sold me this car zeroed these and sent me on my way... in a few days lights went on again (and gradually off by themselves). He said he cleaned the sensors a few days ago, but now I have the same problem. The car seems to work just fine, no heating or anything... Please help!

Answer
Hello,
this car may have a "big" problem. In the service there is a diagnostic machine called as VADIS, from VADIS the Diagnostic Trouble Codes (DTC) should be read, and according to these DTCs we can decide what we will do to solve the problem. So, if you take the DTCs from the service and give me I can help you...

Regards...