Volvo produced a bulletin (Number 83-84) regarding a water leak from the sunroof. The root cause and repair provided in this bulletin is informative and well done. What it doesn’t cover is where the water travels to. And that may be partly due to the fact that water takes the path of least resistance. It may not travel in the same direction with every car. Mike Abrey from Franks Transmission Inc. had a 2004 XC90 come in to the shop with several codes logged in the system.