P0C20 - OBD II Trouble Code

Our automotive experts have put together the following information about the P0C20 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 P0C20 code.

OBD II Fault Code

• OBD II P0C20

OBD-II Code Diagnostic Trouble Code is defined as an AUXILIARY Transmission Fluid Pump Phase U-V-W Circuit/Open

The electric motor is controlled by a Motor Control Module that is part of the Drive Motor Generator Power Inverter Control Module. The Motor Control Module monitors the high voltage current driving the transmission. If the current is too low, the transmission will not be able to move the vehicle. When the Motor Control Module detects this, code P0C20 is set.

Diagnostic Trouble Code Symptoms

• Vehicle may be immovable

Common Problems That Trigger the P0C20 Code

• Auxiliary transmission pump failure
• Drive motor generator power inverter control module failure