The engine shutdown solenoid interfaces with the fuel delivery to the engine under specific circumstances. It is located in the fuel supply system and is electronically controlled. When a valve is activated and using some method, it diverts fuel back to the storage tank when activated.
The PCM uses various body and engine position sensor inputs to find out when fuel shut-off is necessary. When this occurs, the Powertrain Control Module provides a voltage signal to the engine cut-off relay which sends it, and subsequently, the solenoid is activated. The valve, once enabled, prevents fuel from reaching the engine and diverts it to the fuel holding tank through a specially designed low-pressure return line.
P0215 OBDII fault code is set when the PCM detects a voltage level that does not meet the manufacturer’s specifications in the engine shutdown solenoid circuit.