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 a part of your car that helps it move through the air smoothly isn't working right because a sensor isn't getting enough power.
The Active Aerodynamic Feature D Position Sensor 2 is not receiving the correct voltage, which affects its operation.
The B3A5B code indicates that the circuit for the Active Aerodynamic Feature D Position Sensor 2 is experiencing low voltage. This sensor is responsible for monitoring the position of a movable aerodynamic component, such as a spoiler or grille shutter, which adjusts to improve vehicle aerodynamics. Low voltage can prevent the sensor from accurately reporting the position of the component.
• Warning light on the dashboard
• Reduced fuel efficiency
• Unusual noise from the aerodynamic component
• Faulty position sensor
• Wiring issues such as a short circuit or open circuit
• Faulty power supply to the sensor
Aerodynamics: The study of how air interacts with moving objects.
Sensor: A device that detects or measures a physical property and records, indicates, or otherwise responds to it.
• Use a multimeter to check the voltage at the sensor connector.
• Inspect the wiring and connectors for damage or corrosion.
• Test the sensor for proper operation.
• Replace the faulty sensor if necessary.
• Repair or replace damaged wiring or connectors.
• Ensure the power supply to the sensor is stable and within specifications.
• Multimeter
• OBD-II scanner
• Basic hand tools
$100 - $300
Moderate
• Vehicle 1
• Vehicle 2
• Vehicle 3
• Regularly inspect and maintain vehicle wiring.
• Ensure sensors are clean and free from debris.
• Check for software updates from the manufacturer.
Sensor Issue
• Have a professional diagnose the issue if you're not familiar with car electronics.
• Avoid driving at high speeds until the issue is resolved.
Check with your vehicle manufacturer for warranty coverage on sensors and aerodynamic components.
This code has been associated with newer vehicles equipped with active aerodynamic systems, which are designed to improve fuel efficiency and performance.
Moderate – While not immediately dangerous, it can affect fuel efficiency and vehicle performance.
Driving with a malfunctioning aerodynamic system may not comply with emissions regulations and could affect vehicle safety.
• Vehicle at operating temperature
• Aerodynamic system active
The position sensor is typically located near the aerodynamic component it monitors, such as a spoiler or grille shutter.
Q: Can I drive with this code?
A: Yes, but it's best to have it checked soon to avoid reduced fuel efficiency and potential damage.
Q: Will fixing this code improve my gas mileage?
A: Yes, resolving the issue can help restore optimal aerodynamic performance and improve fuel efficiency.
Pro · Four-system diagnostics
A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.
Body and airbag faults often need a scanner that can access more than generic powertrain codes.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking power, ground, and continuity in body-system circuits.
View on Amazon
Universal · Fuse kit
Useful for electrical diagnosis when blown fuses or circuit faults are part of the troubleshooting process.
Useful when body electrical faults trace back to blown fuses or shared circuits.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.