Good morning all. I have a 2017 Toyota Sienna LE which had a slow coolant leak from the water pump housing. I replaced the water pump and gasket, and since you have to remove the thermostat and thermostat housing to get to the pump, I replaced those as well. I did a pressure test after the job was done, and it looks like the leak may be fixed. When I got up this morning and went to drive the van, I had a check engine light and the cruise control wouldn't work. The error code that it presents is P0598 and gives the text "Cruise Control Control Circuit Low". A quick Google search says that it should be "Thermostat Heater Control Circuit Low". Which is it? should I troubleshoot the thermostat because of the code, or just the cruise control? Any help you guys give will be greatly appreciated!
