So recently the Service Engine Soon light has come on in my truck. I brought it to the shop and had them check what code the truck was reading. It said P1774. P1774 stands for: Possible causes Faulty Low Coast Brake Solenoid Valve Low Coast Brake Solenoid Valve harness is open or shorted Low Coast Brake Solenoid Valve circuit poor electrical connection. Now this code is not very clear as to what I need to focus on fixing since there are several things that could need fixing. Does anyone on here know enough to be able to help me find the specific problem? I can provide additional information as needed. I am triying to fix this truck without breaking the bank. Anything will help!