New S80 owner, i have a 1999 Volvo S80 and its main issue is a coolant leak coming from the front of the car near the radiator(?) Assuming its leaking from a clamp, my dad tightened it and i drove it for a few miles off and on since and i went out a half hour ago and there was a huge leak coming from under the car. On another note, It also had the check engine light on, it got an oil change about 30 miles ago now and hasnt gone off. My dad has an OBD II sensor and said it was a P0014 code supposedly. I have to pass DEQ asap and would hope the light is off and the coolant stops leaking. Anything helps!

 

Its been leaking for the past 5 hours since I drove it and I came out to see how huge the leak got from sitting

 

Hey Ive had similar issues with my 2004 S80, not sure exactly where the leak is in the photos but mine seemed to be from the radiator to the thermostat. Turns out my thermostat was bad causing excessive heat which destroyed the fittings and hoses causing a pretty bad leak. It also doesn’t show any temp difference on the gauge. I was able to fix it by replacing the thermostat. I hope this might help, this is such an infuriating issue. Good luck.