Wouldn’t you know it I took the Dodge to fill it up . Heading home CEL came on got home plugged the scanner in p0541 Grid heater solenoid low voltage . Cleared it came right back truck would be ok without the grid in summer but I don’t like the CEL light on . Messed with the connections after I contorted my 65 year old body around the intake horn and passenger side battery. I touched the positive lug from the battery it fell off the solenoid . Tried to get the nut off it too just turned to dust . As luck would have it I was able to get a new one . After some very colorful words I had the new one in ,cleared the code and it hasn’t returned. I also put a new serpentine belt in it . It was replaced last a few years ago when I did the water pump flush and new hoses. But figured it’s cheap insurance to change it out .