MAN L2000 2005 Power Loss

This is the weirdest fault because it doesn&happen all the time, it comes and goes randomly. Usually when the loss of power happens the STOP and Engine Heat lights are blinking and the engine heat indicator is showing normal working temperatures as you can see in the video and it seems like the loss of power is synchronized with the fault light blinking. I&checked the truck at MAN center, and the computer reading was indicating temperature sensor fault. The sensor has been replaced in a new one but the fault remains. Any idea what is the problem and how can I fix it?