P0C77 - OBD II Trouble Code

Our automotive experts have put together the following information about the P0C77 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P0C77 code.

OBD II Fault Code

• OBD II P0C77

OBD-II Code Wiring issue is defined as a Hybrid Battery System Precharge Time Too Short

The high voltage system is controlled by two high voltage contactors that act like switches for the high voltage battery. When the vehicle is off, both switches are open. When the vehicle is turned on, the first switch (Pre-charge Switch) closes, allowing the high voltage to start powering up the rest of the vehicle. If the first switch fails to operate properly, code P0C77 is stored.

Common Problems That Trigger the P0C77 Code

• Pre-charge contactor failure
• Starter/generator control module failure
• Wiring issue