Working on a 2010 Volvo XC60 semi-smart key, adding a key with xhorse vvdi key tool plus, already read CEM information, but when loading and trying to program the car starts acting weird and this message is on the dash. I already disconnected the battery several times and the same thing. One time the car started with the client key but the dash light started blinking, wipers, inside lights
like a Christmas tree. Now the second key chip is showing locked on my reading tool.
soldering very carefully on that, read CEM was smooth and successful. The vehicle battery is showing strong.
! UPDATE ! Well… I disconnected the battery for about 7 hours last night while fully charging the battery… checked all CEM connectors as recommended and put it back…and connected the battery… tried both key fobs and locked and unlocked… no more lights on and off and the vehicle started right away!
Hope it helps.