Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's too much electricity going to a part of the car that helps it move through the air better.
The Active Aerodynamic Feature Control Module B is receiving a higher voltage than expected, which could affect its operation.
The B3A28 code indicates that the power mode circuit of the Active Aerodynamic Feature Control Module B is experiencing a voltage level that is higher than the specified range. This could be due to a short circuit, a faulty module, or an issue with the power supply.
• Check Engine Light is on
• Reduced aerodynamic performance
• Potential decrease in fuel efficiency
• Faulty Active Aerodynamic Feature Control Module B
• Short circuit in the wiring harness
• Faulty power supply or voltage regulator
Active Aerodynamics: Systems in a vehicle that adjust to improve airflow and efficiency.
Control Module: A device that manages the operation of certain vehicle functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring harness for any signs of damage or short circuits.
• Check the voltage levels at the control module to ensure they are within specifications.
• Repair or replace damaged wiring.
• Replace the faulty module if necessary.
• Ensure the power supply is functioning correctly.
• OBD-II scanner
• Multimeter
• Wiring repair tools
$150 - $600
Moderate
• Vehicle 1
• Vehicle 2
• Vehicle 3
• Regularly inspect wiring for damage.
• Ensure proper maintenance of electrical systems.
• Avoid aftermarket modifications that could affect voltage levels.
Electrical Circuit Issue
• Avoid driving at high speeds until the issue is resolved.
• Consult a professional mechanic for a thorough diagnosis.
Check with your vehicle manufacturer; electrical components may be covered under warranty.
This code has been associated with issues in vehicles with advanced aerodynamic features.
Moderate – Addressing this issue can prevent further damage and maintain vehicle efficiency.
Driving with this issue may not be safe as it can affect vehicle performance. Ensure repairs are conducted by a qualified professional.
• Vehicle must be in a safe, stationary position.
• Ensure the engine is off before inspecting electrical components.
The Active Aerodynamic Feature Control Module is typically located near the front of the vehicle, integrated with the aerodynamic components.
Q: Can I drive with the B3A28 code?
A: It's not recommended as it may affect vehicle performance and efficiency.
Q: How can I reset the B3A28 code?
A: Fix the issue first, then use an OBD-II scanner to clear the code.
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