AutoCodes – Generic – P0C05

P0C05 Code - Drive Motor 'A' Phase U-V-W Circuit/Open

Quick Answer

When three-phase alternating current flows through the three-phase windings of the stator coil, a rotating magnetic field is generated in MG2. Common causes include Faulty Hybrid Vehicle Motor Assembly, Hybrid Vehicle Motor Assembly harness is open or shorted, Hybrid Vehicle Motor Assembly circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0C05 indicates Drive Motor 'A' Phase U-V-W Circuit/Open.
Common causes: Common causes include Faulty Hybrid Vehicle Motor Assembly, Hybrid Vehicle Motor Assembly harness is open or shorted, Hybrid Vehicle Motor Assembly circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 7,387

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 11, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0C05 Description

When three-phase alternating current flows through the three-phase windings of the stator coil, a rotating magnetic field is generated in MG2. The system controls the rotation of the magnetic field in accordance with the rotating position and speed of the rotor. As a result, the permanent magnets provided in the rotor are pulled in the direction of rotation, generating torque. The generated torque is almost proportional to the amount of current. The system controls MG2 speed by regulating the frequency of the alternating current. Furthermore, the system properly controls the rotating magnetic field and the angle of the rotor magnets in order to generate high torque in an efficient manner, even at high speeds.

OBDII Code P0C05 - Drive Motor 'A' Phase U-V-W Circuit/Open - AutoCodes.com — P0C05 Code - Drive Motor 'A' Phase U-V-W Circuit/Open

What does this mean?

What are the Possible Causes of the DTC P0C05?

Faulty Hybrid Vehicle Motor Assembly
Hybrid Vehicle Motor Assembly harness is open or shorted
Hybrid Vehicle Motor Assembly circuit poor electrical connection

How to Fix the DTC P0C05?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0C05 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0C05 code?

Need more information on how to fix the P0C05 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0C05 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P0C05 Buick — Drive Motor Phase U-V-W Circuits
P0C05 Cadillac — Drive Motor Phase U-V-W Circuits
P0C05 Chevrolet — Drive Motor Phase U-V-W Circuits
P0C05 GMC — Drive Motor Phase U-V-W Circuits

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0C05 Code

1. What are the common symptoms of OBDII code P0C05 Drive Motor 'A' Phase U-V-W Circuit/Open?

- Common symptoms include poor acceleration, loss of power, and potentially stalling of the vehicle.

2. What are the possible causes of OBDII code P0C05 Drive Motor 'A' Phase U-V-W Circuit/Open?

- The code can be triggered by issues such as damaged wiring, loose connections, or a faulty drive motor 'A' phase circuit.

3. How serious is OBDII code P0C05 Drive Motor 'A' Phase U-V-W Circuit/Open?

- This code should be addressed promptly as it can lead to drivability issues and potential safety concerns if left unresolved.

4. Can driving with OBDII code P0C05 Drive Motor 'A' Phase U-V-W Circuit/Open cause further damage?

- Continuing to drive with this code present can potentially cause damage to other components in the vehicle's electrical system.

5. How can I diagnose OBDII code P0C05 Drive Motor 'A' Phase U-V-W Circuit/Open?

- Diagnosis typically involves using a scan tool to read the code, followed by inspecting the drive motor circuit for any visible damage or issues.

6. Are there any DIY repair tips for fixing OBDII code P0C05 Drive Motor 'A' Phase U-V-W Circuit/Open?

- DIY repair tips may include checking and securing any loose connections, inspecting for damaged wiring, or consulting a professional for further assistance.

7. What is the typical cost to repair OBDII code P0C05 Drive Motor 'A' Phase U-V-W Circuit/Open?

- The cost of repair can vary depending on the extent of the issue, but it may involve replacing damaged wiring or components in the drive motor circuit.

8. Can resetting the OBDII system clear the P0C05 code temporarily?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear.

9. Is it safe to drive my vehicle to a repair shop with OBDII code P0C05 Drive Motor 'A' Phase U-V-W Circuit/Open?

- It is recommended to avoid driving the vehicle if possible and have it towed to a repair shop to prevent any further damage or safety risks.

10. How can I prevent OBDII code P0C05 Drive Motor 'A' Phase U-V-W Circuit/Open from occurring again in the future?

- Regular maintenance checks, avoiding harsh driving conditions, and promptly addressing any electrical issues can help prevent the recurrence of this code.