Hello together, I have the following problem. For some time now, my Prius 2 78 HP shows me a red triangle alternately. In the monitor the water temperature sign is there. (ROT) This goes away again after some time, but then comes back occasionally. The heating of the car also no longer works. Recently the error memory was deleted. Then everything worked again without problems and he didn’t piss. Then it started again. Sometimes the engine control light also lights up. Yesterday the thermostat and the coolant temperature sensor were changed. It took only 30 km until it started to pip again jurz. The heating is no longer possible. Now he beeps again occasionally and says that the engine temperature is too high. The fans start to work. Climate also works. Yesterday the heating had from time to time the funny thing, that she only blown from approx. 100 really. In summer the V-belt / timing belt for the Was What is it? As soon as you delete the fault memory everything works perfectly … The temperature probably also goes up to 135 .. Thanks in advance.