Hello and Welcome to justanswer..
My name is MIKE- Im happy to help you / advise you on this.
When this message comes on , it means the cars Ecu - engine management computer, has detected a fault somewhere
in the management systems... and so it puts that message on to tell you .
Often you get a warning triangle too - if its orange lit its not so urgent , if its red lit, its more so urgent.
But either way it needs now connecting to a VOLVO or similar garage suitable equipment which will scan the fault memory on the cars Ecu as above - and that then will tell the tech just where the fault lies - what needs to be done and then this can be sorted out for you -
So that is what you need to do now to get this sported out for you.
Let me know if you need anything more on this at all -
>> >> Meantime -- Please click on the OK rating to Excellent ratings service for me now, Thank you for that... and you can get back to me anytime if you need / wish..
Best Rgds, MIKE.
Please note, you are rating the content of my "answer" - my help to you - not the "system" which can experience delays etc which are not under my personal control -or delays caused by "time -off" which we all have on occasion - Thank you.