DTC code P0627 OBDII means that a problem has been found in the fuel pump control circuit. Usually, this problem is caused by defects in the wires or connectors within the circuit or the Control Area Network (CAN) bus.
The PCM (Powertrain Control Module) identifies this fault, however, there are other support modules such as the Alternative Fuel Control Module, Fuel Injection Control Module, and Turbo Control Module, which can activate this particular code.
The proper functioning of the fuel pump is essential for the vehicle because if it does not work properly there is no fuel supply for the engine. The control circuit is in charge of turning the pump on and off, and it does so as the operator requires. If there is an opening in this circuit, the Check Engine light will light up and this code will appear.