Hello everyone, I am trying to deal with a complicated problem. Therefore, I will try to explain every detail to you. Sometimes when my car is idling, cylinder number 3 stops working and the radiator fan runs at full speed. After waiting 5 minutes, the radiator fan stops and the car continues to run smoothly again. There is no problem in its performance. It usually doesn't do this while driving, there is a momentary vibration when idling. The fault light starts flashing and the engine operates as 2 cylinders. Sometimes I unplug the battery cable and plug it back in and continue driving the car all day long. Oxygen sensor and crank sensor changed, timing set changed approximately 50,000 kilometers ago. I don't want to replace a solid part anymore. There is an interesting situation that caught my eye. If I turn on the air conditioner, I do not encounter this error all day long, that is, I do not encounter this error when the idle speed is above a certain level. I suspect that the timing of the cam belt is slipping or that there is a problem with the valves. These are of course problems that I guessed without any examination. Unfortunately, it is not possible to focus on a single area to find this complicated error, there are hundreds of parts in the engine and it could be from any of them. error codes p1339,p0053. sometimes p0014,p0420