Hello, I have a problem with my 2010 Opel Astra J 1.4 Turbo 140km, while driving I get the message "Vehicle failure, contact service". After the message appears, the car minimally loses its power, the coolant temperature is OK (90 degrees), besides this, no other message appears. I would like to find out what the problem is and what should be done in this respect, does this result in a serious fault in the car. Please advise.