AutoCodes – Toyota – P0A6C Toyota

P0A6C Toyota Code - Drive Motor 'B' Phase W Current

Quick Answer

The inverter converts the high-voltage direct current of the HV battery and the alternating current for the MG1/MG2. Common causes include Faulty Inverter With Converter Assembly, Inverter With Converter Assembly harness is open or shorted, Inverter With Converter 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: P0A6C Toyota indicates Drive Motor 'B' Phase W Current.
Common causes: Common causes include Faulty Inverter With Converter Assembly, Inverter With Converter Assembly harness is open or shorted, Inverter With Converter 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 1,976

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 Oct 12, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0A6C Toyota Description

The inverter converts the high-voltage direct current of the HV battery and the alternating current for the MG1/MG2. The inverter contains a three-phase bridge circuit, which consists of 6 power transistors each for the MG1 and the MG2, in order to convert the direct current and the three-phase alternating current.
The HV control ECU controls the actuation of the power transistors.
The inverter transmits information that is necessary for effecting control, such as the amperage and voltage, to the HV control ECU.
The motor inverter current sensors detect the amperage that flows through the V and W phase cables between the inverter and MG1/MG2. The inverter transmits information that is necessary for effecting control, such as the amperage and voltage, to the HV control ECU.
The HV control ECU monitors the inverter current sensors to detect a malfunction in the sensor system.

OBDII Code P0A6C Toyota - Drive Motor 'B' Phase W Current - AutoCodes.com — P0A6C Toyota Code - Drive Motor 'B' Phase W Current

What does this mean?

What are the Possible Causes of the DTC P0A6C Toyota?

Faulty Inverter With Converter Assembly
Inverter With Converter Assembly harness is open or shorted
Inverter With Converter Assembly circuit poor electrical connection

How to Fix the DTC P0A6C Toyota?

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 P0A6C Toyota 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.

Frequently Asked Questions about P0A6C Toyota Code

What does the OBDII code P0A6C mean for a Toyota vehicle?

The P0A6C code indicates an issue with the Drive Motor 'B' Phase W Current, which refers to an abnormal electrical current detected in the phase winding of the secondary drive motor.

What are the common symptoms of the P0A6C code in a Toyota?

Symptoms may include reduced vehicle performance, illuminated warning lights (such as the Check Hybrid System light), and limited or no electric motor operation.

What causes the P0A6C code to be triggered?

The code is typically caused by issues such as a malfunctioning drive motor, a fault in the inverter/converter, damaged wiring or connectors, or poor communication between the hybrid components.

Can I continue driving with the P0A6C code active?

Itâ€™s not recommended to drive for long periods with this code active, as it may lead to further damage to the hybrid system or leave you stranded if the electric motor fails completely.

How is the P0A6C code diagnosed?

A technician will use an OBDII scanner to confirm the code, inspect the hybrid drivetrain components, check for damaged wiring or connectors, and test the functionality of the drive motor and inverter.

What repairs can fix the P0A6C code in a Toyota?

Repairs may include replacing the drive motor, repairing or replacing damaged wiring or connectors, or replacing a faulty inverter/converter assembly.

Is the P0A6C code specific to Toyota hybrid vehicles?

Yes, this code is specific to Toyota and Lexus hybrid vehicles and relates to the hybrid drive motor and its electrical system.

How much does it cost to repair the P0A6C code issue?

Repair costs can vary widely, ranging from $200 for wiring repairs to several thousand dollars for replacing major components like the drive motor or inverter.

Can a low hybrid battery state of charge cause the P0A6C code?

While a low hybrid battery charge is not a direct cause, it may exacerbate existing issues in the hybrid system, triggering the code.

How can I prevent the P0A6C code from occurring?

Regular maintenance of the hybrid system, including inspecting wiring and connectors and addressing any electrical issues early, can help prevent the P0A6C code from appearing.