[SOLVED] P0A91 Code – Drive Motor ‘b’ Performance: Causes And Fixes

Are you wondering what the automobile fault code P0A91 means? Well, when you see the Engine Light ON or the Service Engine Soon Warning Light, it could be an indication of this fault code. The P0A91 code is typically caused by a faulty engine assembly, HV transaxle assembly, transmission input damper, wire harness, or connector.

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

It’s important to address this problem promptly as it can affect the performance of your vehicle. The repair time for this fault code is estimated to be around 1.0. So, make sure to check the possible causes and take the necessary steps to resolve the issue.

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 p0a91 fault code.

  • The symptoms of the automobile fault code p0a91 include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.

The automobile fault code p0a91 can be caused by a faulty engine assembly, HV transaxle assembly, transmission input damper, wire harness, or HV control ECU.

  • The fault code p0a91 can be caused by a faulty engine assembly, a faulty HV transaxle assembly (shaft or gear), a faulty transmission input damper, issues with the wire harness or connector, or a problem with the HV control ECU.

To fix the automobile fault code p0a91, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code p0a91, start by checking 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 connector pins.
  • This fix is estimated to take approximately 1.0 hour.

The factors influencing the cost of diagnosing and fixing the automobile fault code p0a91 include the estimated repair time of 1.0 hour. Most auto repair shops typically charge between $75 and $150 per hour for their services. These factors contribute to the overall cost of resolving the fault code.

The P0A91 fault code refers to the performance of Drive Motor ‘B’ in the HV transaxle system. The HV transaxle consists of a planetary gear unit, MG1, and MG2. MG2 assists the engine output and increases the drive force of the vehicle.

It also converts energy from regenerative braking into electrical energy to charge the HV battery. MG1 supplies electrical power for charging the HV battery and driving MG2.

It also acts as a starter motor for the engine. The transmission input damper absorbs shock during the transmission of drive force from the engine.

The P0A91 code indicates a performance issue with Drive Motor ‘B’ in the HV transaxle system.

What are the possible causes of the automobile fault code p0a91?

If you see the engine light on or the service engine soon warning light, the fault code P0A91 could be the culprit. This code can be caused by a few different things, including a faulty engine assembly, a faulty HV transaxle assembly, a faulty transmission input damper, or an issue with the wire harness or connector. To fix this issue, start by visually inspecting the wiring harness and connectors. Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins. Don’t forget to check the possible causes listed above for further troubleshooting.

How can I visually inspect the wiring harness and connectors to fix the p0a91 fault code?

If you’re dealing with the p0a91 fault code and your engine light is on, it’s time to visually inspect the wiring harness and connectors. This could be the fix you need. Take a close look at the wiring harness and connectors, checking for any damage or signs of wear. Look out for broken, bent, pushed out, or corroded pins on the connectors. By doing this, you’ll be able to identify any issues and take the necessary steps to resolve them.

What should I look for when checking for damaged components or broken, bent, pushed out, or corroded connector’s pins to resolve the p0a91 fault code?

When resolving the p0a91 fault code, 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. This can help identify any issues with the engine assembly, HV transaxle assembly, transmission input damper, wire harness, or HV control ECU. By thoroughly examining these areas, you can pinpoint the cause of the fault code and proceed with the necessary repairs.

p0a91 error fault code explained

If you’re seeing the Engine Light ON or the Service Engine Soon Warning Light, the p0a91 fault code could be the culprit. It’s usually caused by a faulty engine assembly, HV transaxle assembly, transmission input damper, wire harness, or connector.

To fix it, visually inspect the wiring harness and connectors for any damage, and check for broken or corroded pins.

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