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Home >> Jeep >> 2025 >> Grand Cherokee Altitude, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 21 (Battery Pack Control Module (BPCM) - DTCS P0B3D-00 To P0D08-00) >> DTC Troubleshooting >> P0C78-00 Hybrid/EV Battery System PRECHARGE Time Too Long >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2025 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
12 VOLT SYSTEM VOLTAGE LOW
HV FUSE OPEN
HV CABLE NOT CONNECTED TO BATTERY PACK
VEHICLE HIGH VOLTAGE CABLE DISCONNECTED (SEVERED)
SHORTED HV COMPONENT
BATTERY PACK CONTROL MODULE (BPCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  and/or  BPCM PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .