P0AF4 Fault Code

Drive Motor Inverter Temperature Sensor "B" Circuit Low

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

The P0AF4 fault code indicates a problem with the Drive Motor Inverter Temperature Sensor "B" circuit being detected as low. This sensor plays a critical role in monitoring the temperature of the drive motor inverter, ensuring that it operates within safe limits. If the circuit is reading low, it could mean that the sensor is malfunctioning or that there is an issue with the wiring or connections associated with the sensor. It's important to address this fault to prevent overheating and potential damage to the inverter.

What are the symptoms of the P0AF4 code?

Drivers may notice several symptoms when the P0AF4 code is present, which may include:

• Warning lights illuminating on the dashboard, such as the check engine light or a specific hybrid warning.
• Reduced performance or efficiency of the hybrid or electric vehicle.
• Potential overheating of the inverter, leading to further issues if not addressed.
• An overall drop in electrical system performance, affecting acceleration and responsiveness.

What causes the P0AF4 code?

Common causes of the P0AF4 code include:

• A malfunctioning Drive Motor Inverter Temperature Sensor "B" that has failed or is providing incorrect readings.
• Damaged or disconnected wiring or connectors that compromise the sensor's circuit.
• Corrosion or wear over time that affects the electrical connections.
• A fault in the inverter itself which might cause atypical temperature readings.

How to fix P0AF4?

To resolve the P0AF4 fault code, technicians may take several steps:

• Inspect the Drive Motor Inverter Temperature Sensor "B" for signs of physical damage or malfunction.
• Check and repair any damaged wiring or connectors related to the sensor.
• Replace the temperature sensor if it is found to be faulty.
• Clear the error codes and conduct a test drive to ensure that the issue has been resolved and that the vehicle is functioning normally.