P0641 Cadillac -

Question

CHECK ENGINE LIGHT ON, ENGINE STARTS BUT STALLS OUT AFTER ABOUT 30 SECONDS ENGINE RPM GOES UP AND DOWN. SEVERAL CODES BEIND DESPLAYED. THE PARK INDICATOR SIGNAL STAYS ON

Answer 1

P0641 5 Volts reference 1 circuit

There are 4, 5 volts refference where the ECM supplies 5 volts refference to various sensor,one or more of these sensor are either shorted to ground or shorted, do you have the other code that is with this ? to pin point its exact cause?