Faulty Control Module setting the code
Control Module harness is open or shorted
Control Module circuit poor electrical connection
Engine Light ON (or Service Engine Soon Warning Light)
The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. With the ignition is ON, the Diagnostic Trouble Code (DTC) will set when the control module or sensor detects a system voltage of less than approximately 9 V for approximately 5 s.