egine cooling system
 

I have 99 s80 t6. it has been in limp mode since i purchase it. checking aroung the car b4 i payed the money for diagnostics i notice that there is a hose that comes off the coolant overflow right of the cap. on the car i bounght there was a hose but it has a bolt and clamp going to it. i was wondering if that could be why my car is in limp mode and if not, where does that hose go???? im sure i was meant to be somewhere. please someon e help i feel like i got a lemon already. thanks!