I have a 2013 6.7 roughly 140,000 miles, my water in fuel light came on drain separator. I want to make sure its the little yellow turn knob on the fuel filter housing first of all. I did drain that two different times, fuel looked good and no water. I ran it for a while, light did not go off. Now reduced engine power light on. When I first looked under, sensor was unplugged. Any chance sensor is bad, any recommendations.