Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is having trouble getting enough power to a part that helps the car move through the air better.
This code indicates that the voltage level in the power mode circuit of the Active Aerodynamic Feature Control Module A is lower than expected.
The B3A25 code is triggered when the Active Aerodynamic Feature Control Module A detects a low voltage condition in its power mode circuit. This module is responsible for controlling aerodynamic features like active grille shutters or spoilers, which help improve fuel efficiency and performance by adjusting the vehicle's aerodynamics.
• Check engine light or warning light on the dashboard
• Reduced fuel efficiency
• Aerodynamic features not functioning properly
• Faulty Active Aerodynamic Feature Control Module A
• Poor electrical connection in the power mode circuit
• Blown fuse or faulty wiring
Aerodynamic: The study of how air flows around objects, like cars.
Voltage: The electrical force that powers devices and systems.
• Check for any blown fuses related to the aerodynamic system.
• Inspect wiring and connectors for damage or corrosion.
• Test the voltage at the Active Aerodynamic Feature Control Module A.
• Replace any blown fuses.
• Repair or replace damaged wiring or connectors.
• Replace the Active Aerodynamic Feature Control Module A if faulty.
• Multimeter
• OBD-II scanner
• Basic hand tools
$100 - $500
Moderate
• Chevrolet Camaro
• Ford Mustang
• Dodge Charger
• Regularly inspect electrical connections.
• Ensure all fuses are in good condition.
• Keep the vehicle's electrical system well-maintained.
Electrical Issue
• Avoid driving at high speeds until the issue is resolved.
• Consult with a professional mechanic for proper diagnosis.
Check with your vehicle's manufacturer for warranty coverage on electrical components.
This code has been reported in vehicles with advanced aerodynamic features, often due to electrical issues.
Moderate – It should be addressed soon to ensure optimal vehicle performance.
Ignoring this code may lead to decreased fuel efficiency and performance, which could be a safety concern.
• Vehicle in park with ignition on
• Battery fully charged
The Active Aerodynamic Feature Control Module A is typically located near the front of the vehicle, close to the grille or bumper area.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to reduced fuel efficiency and potential damage to aerodynamic components.
Q: Can I drive my car with this code?
A: While you can drive the car, it's best to have the issue addressed to maintain optimal performance.
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.
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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.
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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.
Fitment Required · Vehicle-fitment part
Relevant for airflow, fuel-trim, and intake-metering faults after confirming the sensor is actually at fault.
Airflow and fuel-trim codes can involve the mass air flow sensor after proper diagnosis.
Verify the sensor design and fitment for your exact vehicle.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.