Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer found a problem with a sensor that checks how hot the motor's inverter is. It's like a thermometer for a part of the car that helps the motor run, and it's not working right.
The P0AF3 code is triggered when the vehicle's powertrain control module (PCM) detects an issue with the temperature sensor that monitors the inverter for the drive motor. This sensor is crucial for ensuring the inverter operates within safe temperature limits.
The drive motor inverter is a component in hybrid and electric vehicles that converts DC power from the battery to AC power for the electric motor. The temperature sensor B monitors the temperature of the inverter to prevent overheating. If the sensor's readings are outside of the expected range, the PCM will set the P0AF3 code.
• Check Engine Light is on
• Possible reduced performance of the electric motor
• In some cases, no noticeable symptoms
• Faulty drive motor inverter temperature sensor B
• Wiring issues such as shorts or open circuits in the sensor circuit
• Faulty PCM or software issue
PCM: Powertrain Control Module
Inverter: A device that converts DC to AC power for the electric motor
• Use an OBD-II scanner to confirm the P0AF3 code is present.
• Inspect the wiring and connectors for the inverter temperature sensor B for damage or corrosion.
• Test the temperature sensor B for proper resistance and operation.
• Replace the faulty drive motor inverter temperature sensor B.
• Repair or replace damaged wiring or connectors.
• Update or reprogram the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular maintenance checks on the vehicle's electrical system
• Ensure cooling systems are functioning properly
• Avoid extreme driving conditions that may overheat the inverter
Sensor Issue
• If the check engine light is on, have the vehicle inspected promptly.
• Avoid heavy loads or high-speed driving until the issue is resolved.
Check with your vehicle manufacturer as some components may be covered under powertrain or emissions warranty.
This code is more common in hybrid and electric vehicles due to their reliance on electric drive systems.
Moderate – While the vehicle may still operate, ignoring this issue could lead to further damage or reduced performance.
Driving with a malfunctioning inverter sensor could lead to overheating and potential vehicle damage.
• Vehicle at operating temperature
• Access to the inverter and sensor components
The drive motor inverter temperature sensor is typically located near or on the inverter assembly, which is usually found in the engine bay or under the vehicle.
Q: Can I drive my car with a P0AF3 code?
A: It's possible to drive for a short period, but it's not recommended as it could lead to further damage.
Q: How do I reset the P0AF3 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is fixed, it should not return.
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