Purchased 2012 Volvo V60 D2 Automatic 5 weeks ago the car has full service history and only 52k miles, it had low battery warning when purchased, previous owner said it was due to not being used. Two weeks later came up with low transmission then the following week came up with all warning lights on dash, no screen, indicators not working etc and braking fault all of which went away after restarting the car. so booked into local independent Volvo specialists who couldn't find any faults and recommended taking it to Volvo dealership.I replaced the main battery with a genuine volvo item and car was fine for 3 weeks. Yesterday it came up with the same faults 3 times in a row but never cleared after restarting. When we got home the dash stayed on and the car wouldn't lock. Came to the car this morning and nothing completely flat. So I have just recharged the old battery and refit that and try recharging the new battery. Could this be an icm or cem fault?

 

I have fitted the old battery and it starts and drives but all the warning lights are on the dash, the stereo screen is off and the speedo and rev are not working