I had the lower heater hose fail because the plastic Y broke while driving down the road. Temp gauge went red, overheating warning, and limp mode all kicked in and I pulled over and shut it off. After I replaced the hose and filled with coolant, I can't get the car to run right. When I turn the key on, the temp still shows it's overheating and the overheating warning comes on. Ignoring this, when I start it, it is in limp mode. This is when the car is cold, like hasn't been running for days. Any ideas?