P0A42 Fault Code

Drive Motor "A" Position Sensor Circuit High

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

The P0A42 fault code indicates a high voltage signal from the Drive Motor 'A' Position Sensor Circuit. This situation often signifies a malfunction either in the sensor itself or in its associated wiring and connectors. The Drive Motor Position Sensor is crucial for monitoring the position of the electric motor to ensure optimal performance and efficiency.

What are the symptoms of the P0A42 code?

Drivers experiencing a P0A42 fault code may notice:

• Uneven acceleration or deceleration.
• Reduced power output from the vehicle.
• Warning lights illuminated on the dashboard, such as the check engine light.
• Potentially, the vehicle may enter 'limp mode' to prevent damage until the issue is resolved.

What causes the P0A42 code?

Common causes for the P0A42 code include:

• Faulty Drive Motor Position Sensor.
• Damaged wiring or connectors in the sensor circuit.
• Poor electrical connection or corrosion at the sensor terminals.
• Issues with the vehicle's motor control module (MCM) that may lead to incorrect signal interpretation.

How to fix P0A42?

To resolve the P0A42 code, the following steps should be taken:

• Inspect the Drive Motor Position Sensor and its wiring for any visible damage or disconnections.
• Test the sensor with a multimeter to verify its functionality and output signal.
• Repair or replace the sensor if it is found to be faulty.
• Ensure all connectors are secure and free from corrosion, cleaning or replacing them as necessary.
• Clear the fault code from the vehicle's computer and conduct a road test to ensure that the issue has been resolved.