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Home >> Chevrolet >> 2013 >> Volt >> Repair and Diagnosis >> Electrical >> Charging Systems >> Plug-In Charging >> Diagnostic Information and Procedures >> DTC P1EF0 or P1EF1 >> Circuit/System Description
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Circuit/System Description

The hybrid/EV powertrain control module 2 and battery charger control module monitor the battery charger high voltage output and current output and ensures it is in the proper range and there is not a resistive short in the charging bus.