P0C76 · Manufacturer communications

CHEVROLET · 2020-01-13

Service Update. Certain vehicles may exhibit the high voltage bulkhead battery disconnect unit (BBDU) positive and/or negative contactors or relays, permanently or intermittently welded in the closed position. Contactors welded in the closed position will set DTC?s P0AA1 (positive), P0AA4 (negative), and P0C76 (hybrid). The malfunction indicator lamp (MIL) may also illuminate and vehicle may not start with this condition. Dealers will reprogram the hybrid powertrain control module.

CHRYSLER · 2017-11-03

Loose High Voltage Cable at the Power Inverter Module (PIM) Terminal This bulletin involves inspecting the High Voltage Interlock Loop (HVIL) connector and potentially installing a Power Inverter Module (PIM) kit. The customer may describe a loss of vehicle propulsion or a Malfunction Indicator Light (MIL) illuminated with the following Diagnostic Trouble Codes (DTCs):P0C77-00 - HV Battery System Precharge Time Too Short. P0C76-00 - Hybrid EV System Discharge Time Too Long - PIM. P0AA4-00 - Hybrid Battery Negative Contactor Circuit Stuck Closed. P0A79-00 - Drive Motor B Inverter Performance. P1AEF-00 - MCPB High Voltage Battery System Voltage High. P0AFA-00 - Hybrid-EV Battery System Voltage Low. P0EED-00 - Hybrid-EV Battery System Discharge Circuit Performance.

CADILLAC, CHEVROLET, GMC · 2012-11-16

This Preliminary Information communication provides information to the technician about vehicles that may have a no crank condition after the vehicle has had very low accessory battery voltage or a dead battery condition. Technician may find Diagnostic Trouble Code P0C76 set. Technician should be advised that anytime a battery charger or booster pack is connected to the 12 volt battery, the ignition key should always be in the off position. If a battery charger or booster pack is connected to the 12 volt battery with the ignition key on tech will need to reset the Hybrid Powertrain Control Module Diagnostic Trouble Codes.