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 the car that helps it move smoothly through the air isn't getting enough power.
The Active Aerodynamic Feature Control Module B is responsible for controlling parts of the car that adjust to improve aerodynamics. This code indicates that the power supply to this module is lower than expected.
The B3A29 code is triggered when the Active Aerodynamic Feature Control Module B detects a low voltage condition in its power mode circuit. This can affect the operation of aerodynamic components like active grille shutters or spoilers that adjust to optimize airflow.
• Check engine light on
• Reduced aerodynamic efficiency
• Potential increase in fuel consumption
• Faulty control module
• Poor electrical connection
• Blown fuse or faulty relay
Aerodynamics: The study of how air interacts with moving objects.
Control Module: An electronic device that manages specific functions in a vehicle.
• Check for any blown fuses related to the control module.
• Inspect electrical connections for corrosion or damage.
• Test the voltage supply to the control module.
• Replace any blown fuses.
• Repair or replace damaged wiring or connectors.
• Replace the control module if faulty.
• Multimeter
• OBD-II scanner
• Screwdriver set
$100 - $500
Moderate
• Vehicle 1
• Vehicle 2
• Vehicle 3
• Regularly check electrical connections.
• Ensure fuses are in good condition.
• Schedule routine maintenance checks.
Electrical Issue
• Avoid high speeds until the issue is resolved.
• Consult a professional mechanic for diagnosis.
Check vehicle warranty for coverage on electrical components.
This code often appears in vehicles with advanced aerodynamic features.
Moderate – It should be addressed to maintain optimal vehicle performance.
Ignoring this code may lead to decreased vehicle efficiency and potential safety concerns.
• Vehicle stationary
• Ignition in the ON position
The control module is typically located near the front of the vehicle, behind the grille or in the engine compartment.
Q: Can I drive with this code?
A: It's possible to drive, but it's best to get it checked to avoid reduced efficiency.
Q: Will this affect fuel economy?
A: Yes, it can lead to increased fuel consumption due to reduced aerodynamic efficiency.
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A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
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