I constantly have "engine fault" light on my dash and when I reach a speed between 70-90 Km/h the engine stop, the error displays again with a beep. Is it safe to drive the car with that constant error? Is there anything I can do to fix this?
No, it's not safe to drive like this. The only thing you can do is take it to a garage and get the fault codes read. That's why there's a light on the dash.