when I insert the key and start the car, the warning lights starts by themselves without pressing emergency blinkers button for them, but I can switch them off by pressing the button, why does this happen every time I start my car?

Hi, I do not know what is wrong with my car but, for some time, a light indicating the engine is damaged has been turning on. When scanning it, an oxygen sensor or lambda sensor failure is indicated. I've replaced it but the car is still the same. The EGR valve, flowmeter and throttle body have also been replaced but without any positive results. If anyone could help me, I would be really glad. Thank you.

Service warning indicator

Sometimes when I’m inserting the key and try to start it the check engine light flashes so that means that the car not starting and I don’t know why but below the steering wheel I give it a strong punch and then magically when I try to start the car it starts normally can anyone tell me what problem it is cause no mechanic knows what is going on

While driving, the engine temperature rises to about 100°C. I noticed that the radiator cooling fan does not turn on, which causes the engine temperature to keep increasing. Other than this issue, the car runs well and has no other problems or warning lights. What could be causing the cooling fan not to start?

Check engine light immediately comes on after starting engine. Use to come and go but now it stays on. Sometimes the engine is loosing power on first two gears. How to switch it off when car is working normal.

The car starts hard and engine lights stays on

When I stay in traffic for ten minutes, the engine light and TP check light come on and I park. After half an hour or an hour, it starts working and after going three or five kilometers, it comes on again.