P1EFB GMC - Battery Charger High-Voltage Converter 2 Input Current Too High
- Faulty Battery Charger
- Battery Charger harness is open or shorted
- Battery Charger circuit poor electrical connection
- Engine Light ON (or Service Engine Soon Warning Light)
P1efb Gmc DescriptionThe hybrid/EV powertrain control module 2 monitors the battery charger high-voltage output and current output and ensures they are within the proper range. The battery charger operates in either a constant current mode or a constant voltage mode. Whichever mode you are in will determine which diagnostic will be run. The battery charger runs constant voltage mode at the beginning and end of the charge cycle and runs constant current mode most of the charging cycle.
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