Hi yes it will keep coming on until the thermostat is replaced. Not sure of your location

there are some autoparts stores that will scan the codes for free. Like an autozone.

Hopefully the code for the no power is stored it could be mutiple things. Without having a fault code its a guessing game on these cars. Here is one example that it could be since it does not happen all the time. Thanks mike

will not let me copy it. Fault with the wiring harness and the throttle assy there is a production date on the throttle to see if it gets replaced or not. But the wiring harness does get replaced no matter what. Internal harness and crimp problems. Just for the same type of problem you are having.

Hi if the sensor was repaced should not be that. Without the fault code nobody will know what is causing it right know need faults. Yes the throttle should give some fault codes.

There is no link. This is from my information from bmw site for technicians. The wiring harness is a common issue for this. But need fault codes. Mike