Volkswagen Vento engine oil light flashing

Engine Performance problem
Volkswagen Jetta 6 cyl Front Wheel Drive Manual

Hi, I am Christopher. I have change my car now to Volkswagen Vento 1997 model with V6 engine.

I drove to school to pick my kid in the afternoon and later in the evening. I get the car tape fixed and after, I start the engine to check with the tape output, and its ok. Later the engine went off. Then I notice the engine oil level signal light flashing and the car did not start. The engine oil level is OK.

The return hose for the fuel is not returning to the tank. But that problem of the fuel not returning had been long waiting problem.
please help.
Thanks

Note
The car is vento, I choose Jetta since there is no vento in the line up