Hello I have a 2004 XC90 T6 AWD model. Recently I my message center said low collant stop engine safetly my temp gauge stayed in the normal zone for my car its right in the middle of the gauge. But it said collant low stop engine saftely so i pulled off to the side of the road popped the hood and noticed my collant was gone just totally gone. I let the car cool off a bit filled up the collant to the max line and started driving agian. Couple days ago i popped my hood agian to see if the coolant was ok It was down to the minimum line. SO i filled it agian and this time i ran the engine in my driveway there were no signs of leakage anywhere at all and still the coolant went to the min line. Where the heck is it all going? I recently had my SEM replaced but that shouldnt affect my cooling system like this should it overall the car is preforming fine actually it is preforming even better with the new SEM my old one got fried some how i dont know volvo replaced it. So anybody got any ideas on how i can fix this id rather fix this my self then go in becauase i am out of my warrenty and it will cost an arm and leg.