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P0C05 OBD2: Drive Motor "A" Phase U-V-W Circuit/Open

P0C05 OBD2: Drive Motor “A” Phase U-V-W Circuit/Open

What Does the P0C05 Code Mean?

The P0C05 OBD-II code indicates that there is an issue with the Drive Motor “A” phase U-V-W circuit, which has been detected as open. This code signifies a problem within the hybrid vehicle’s power inverter control system, specifically related to the drive motor generator assembly.

What Causes the P0C05 Code?

The primary causes of the P0C05 code include:

  • Failure of the drive motor generator assembly
  • Failure of the drive motor generator power inverter control module
  • Wiring issues between the two Motor Control Modules
  • Faulty Hybrid Powertrain Control Module

What Are the Symptoms of the P0C05 Code?

Common symptoms associated with the P0C05 code include:

  • The high voltage system may not operate
  • Warning lights on the dashboard
  • Reduced power or performance from the hybrid system
  • Potential inability to start the vehicle

How Serious Is the P0C05 Code?

The P0C05 code is classified as urgent. Immediate attention is necessary as it indicates significant malfunctions that can lead to severe damage to the vehicle’s hybrid system or even pose safety risks to the driver and passengers.

How to Diagnose the P0C05 Code

Diagnosing the P0C05 code typically involves the following steps:

  1. Use an OBD-II scanner to confirm the P0C05 code and check for any additional codes.
  2. Inspect the wiring and connectors related to the Drive Motor Generator Power Inverter Control Module.
  3. Test the Motor Control Modules for proper functionality.
  4. Evaluate the Hybrid Powertrain Control Module if necessary.

Common Repairs for the P0C05 Code

Repair options for the P0C05 code may include:

  • Replacing the drive motor generator assembly
  • Replacing the drive motor generator power inverter control module
  • Repairing or replacing damaged wiring and connectors
  • Reprogramming or replacing the Hybrid Powertrain Control Module

How Much Does It Cost to Fix the P0C05 Code?

The cost to fix the P0C05 code can vary widely depending on the specific issue. On average, repairs might range from $500 to $2,500, depending on whether components need to be replaced or repaired.

Can I Fix the P0C05 Code Myself?

While some aspects of troubleshooting can be performed at home, it is generally recommended to seek professional help for the P0C05 code. The complexity of hybrid systems and the potential for high voltage hazards necessitate expert diagnosis and repair.

About JC Landry

JC is the Senior Editor at eManualOnline.com, GarageSpot.com, and Drive-My.com, as well as the Webmaster of TheMechanicDoctor.com, only to name a few. He's been a certified Master Mechanic for 15 years, working for various car dealers and specialized repair shops before turning towards blogging about cars and EVs in the hope of helping the next generation of automotive technicians. He also loves cats, Johnny Cash and Subarus.

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