Faulty Engine Shutoff Solenoid
Engine Shutoff Solenoid harness is open or shorted
Engine Shutoff Solenoid circuit poor electrical connection
Faulty Engine Control Module (ECM)
Engine Light ON (or Service Engine Soon Warning Light)
The Diagnostic Trouble Code (DTC) is stored when a fault is detected with the engine shut off solenoid. The solenoid circuit can be tested using a meter. The solenoid resistance should be 15 to 30 ohms, the Engine Control Module (ECM) control circuit can be inspected with an oscilloscope.