Murks near Chevi spark

The engine control lights up all the time. ADAC has fixed the error (bad contact with the petrol pump). All errors in the system have been deleted. But 1 day later engine control again. This car even though only 8,000 km costs me the last nerve. — Tuepic GM – Murks !!!! never again Opel, Chevrolet, GM or the like. Everything cheap Murks !!!