P1EFC GMC - Battery Charger Control Module System Voltage Low Voltage
- Faulty Battery Charger Control Module
- Battery Charger Control Module harness is open or shorted
- Battery Charger Control Module circuit poor electrical connection
- Engine Light ON (or Service Engine Soon Warning Light)
P1efc Gmc DescriptionThe vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. The Powertrain Control Module (PCM) sets the OBDII code when the Battery Charger Control Module is not to factory specifications.
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