[SOLVED] P0A79 Code: Drive Motor ‘b’ Inverter Performance – Troubleshooting And Fix

The automobile fault code P0A79 indicates a problem with the Inverter With Converter Assembly.

The most common symptom is the Engine Light being ON or the Service Engine Soon Warning Light. This fault code can be caused by a faulty Inverter With Converter Assembly, an open or shorted harness, or a poor electrical connection in the circuit.

To fix this issue, you should visually inspect the wiring harness and connectors for any damage. Look for broken, bent, pushed out, or corroded pins in the connectors.

The repair time for this fault code is estimated to be 1.0. It is important to address this issue promptly to prevent further damage to the vehicle’s electrical system.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

When the engine light is on or the service engine soon warning light is illuminated, it could be a sign of the p0a79 fault code.

  • The symptoms of the automobile fault code p0a79 include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.

The automobile fault code p0a79 can be caused by a faulty inverter with converter assembly, an open or shorted harness, or a poor electrical connection in the circuit.

  • The fault code p0a79 can be caused by a faulty Inverter With Converter Assembly, an open or shorted Inverter With Converter Assembly harness, or a poor electrical connection in the Inverter With Converter Assembly circuit.

To fix the automobile fault code p0a79, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code p0a79, first, check the possible causes mentioned above.
  • Then, visually inspect the wiring harness and connectors related to the issue.
  • Look for any damaged components and check for broken, bent, pushed out, or corroded pins in the connectors.
  • This fix is estimated to take approximately 1.0 hour.

The factors influencing the cost of diagnosing and fixing the automobile fault code p0a79 include the estimated repair time of 1.0 hour and the typical hourly rate charged by auto repair shops, which ranges between $75 and $150.

The P0A79 fault code refers to a performance issue with the drive motor ‘B’ inverter. The inverter is responsible for converting the high-voltage direct current from the HV battery into alternating current for the MG1MG2 motors.

It contains a three-phase bridge circuit with power transistors for each motor, allowing it to convert the current effectively. The HV control ECU controls the actuation of these power transistors. The inverter also transmits important information, such as amperage and voltage, to the HV control ECU for proper control.

The motor inverter current sensors detect the amperage flowing between the inverter and MG1MG2 motors. If the HV control ECU detects a malfunction in the sensor system, it triggers the P0A79 fault code.

This code indicates that there is a performance issue with the drive motor ‘B’ inverter, which may require further diagnosis and repair.

What are the possible causes for the automobile fault code p0a79?

If you see the engine light or service engine soon warning light on, the fault code P0A79 could be the culprit. This code is often caused by a faulty inverter with converter assembly, an open or shorted harness, or a poor electrical connection in the inverter with converter assembly circuit. To fix this issue, start by visually inspecting the wiring harness and connectors. Look for any signs of damage or corrosion, and check for broken, bent, pushed out, or corroded pins in the connectors. Don’t forget to consider the possible causes mentioned above.

How can I visually inspect the wiring harness and connectors related to the Inverter With Converter Assembly?

To visually inspect the wiring harness and connectors related to the Inverter With Converter Assembly, start by checking the “Possible Causes” mentioned above. Then, carefully examine the wiring harness and connectors for any signs of damage. Look out for broken, bent, pushed out, or corroded pins on the connectors. This thorough inspection will help identify any issues and allow for timely repairs.

What should I look for when checking for damaged components or corroded connector’s pins to fix the fault code p0a79?

When troubleshooting the fault code p0a79, start by visually inspecting the wiring harness and connectors. Look for any damaged components and check for broken, bent, pushed out, or corroded connector’s pins. These issues can cause a poor electrical connection and lead to the engine light being on. By checking and fixing these potential causes, you can resolve the fault code and ensure proper functioning of the inverter with converter assembly.

p0a79 error fault code explained

To fix the p0a79 fault code, start by visually inspecting the wiring harness and connectors related to the Inverter With Converter Assembly.

Look for any damage or corrosion.

Check for broken, bent, or pushed out pins on the connectors.

Address any issues found to resolve the problem.

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