For the Qashqai, I found that the problem was with the right-hand drive shaft—which has an intermediate bearing connected to the engine and gearbox—so I jack up the wheel and turn it by hand to see if the engine rattles; if it does, then I know it's the driveshaft.

connects the driveshaft to the ...

To test if the heat returns after disconnecting the monovalve, try turning it off and then back on again. Although it is wired to close, the monovalve is normally open. The presence of heat indicates that there is an issue with the control system.

The monovalve plug contains two wires; the system ...

That was the right thing to ask before you sent off the parts cannon.
At the time of my initial scan, a project automobile had fifty or more codes. Focus on a single task at a time.
switch off the ignition, open and close the door, wait 10 seconds, switch on the ignition again, and reread the codes ...