V8 4.2 :Start ,and stalls after a few minutes ?

Hello Guys (and girls)

I did buy a 92 V8 4.2 with 170 000 km in Schweitz
The car is in very good state of repair ( CEO of a big company)
BUT i did take it back to my country ( Frankreich) with my trailor:
In fact the car starts , it run for about 5 minutes and then stalls

The only fault code number is (with but the engine not running) 2111 or 2112 (RPM and TDC sensors) fault code or 2234 (supply Voltage) fault code. But SJM wrote that it is possible to get those "false" fault codes.
I have a 200TQ20V Avant and this errors codes dont mean anything.

My question is : Is my problem a problem that occurs often with V8,( I thought sensors don't really get old, there is no contact ,it is rust free , just some l vibration , like abs sensors)

and do you think that it could be really RPM or TDC sensor?????!
What else ?
I will control my fuel pump but the way the motor stops make me believe it is not a faulty pump that is the reason
My 340 000 km 89 V8 3.6 never failed like that!

Thank you very much ,
Best Regards
FredF