P0A91 Fault Code

Drive Motor "B" Performance

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0A91 fault code indicates an issue with the performance of Drive Motor 'B' within the hybrid or electric vehicle's powertrain system. This code may arise due to various factors affecting the motor's ability to function optimally, impacting the overall performance and efficiency of the vehicle.

What are the symptoms of the P0A91 code?

Drivers may notice one or more of the following symptoms when the P0A91 code is triggered:

• Reduced acceleration and overall vehicle performance.
• Increased energy consumption, leading to decreased battery range.
• Warning lights on the dashboard, usually the check engine light.
• Unusual noises coming from the motor or drivetrain.

What causes the P0A91 code?

Common causes for the P0A91 fault code include:

• Electrical issues, such as a faulty wiring harness or connectors leading to the drive motor.
• Overheating due to insufficient cooling or cooling system failures.
• Malfunctioning power electronics components affecting motor performance.
• Issues with the battery that supplies power to Drive Motor 'B'.

How to fix P0A91?

To address the P0A91 fault code, consider the following repair steps:

• Inspect and repair any damaged wiring or connectors associated with Drive Motor 'B'.
• Check the cooling system for faults and ensure that the drive motor is adequately cooled.
• Test the motor and its electronic components to verify their functionality and replace any faulty parts as necessary.
• Ensure the battery is in good condition and fully charged, replacing it if needed.