AutoCodes – Generic – P0C0A

P0C0A Code - Drive Motor 'B' Phase U-V-W Circuit High

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: P0C0A indicates Drive Motor 'B' Phase U-V-W Circuit High.
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 4,340

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
Comments
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Code P0C0A 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 P0C0A - Drive Motor 'B' Phase U-V-W Circuit High - AutoCodes.com — P0C0A Code - Drive Motor 'B' Phase U-V-W Circuit High

What does this mean?

What are the Possible Causes of the DTC P0C0A?

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 P0C0A?

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 P0C0A 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.

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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.