B3A40

Symptoms

• Disabling active aerodynamics
• Error message on the instrument panel
• Limitation of active spoiler/deflector functions
• Unstable operation of aerodynamic elements at high speeds

Causes

• Actuator overheating
• Damage to the actuator temperature sensor
• Open or shorted wiring harness
• Malfunction of the active aerodynamics control unit
• Mechanical damage to the drive (jamming, wear)

How to Fix

1. Diagnostics of the active aerodynamics system using a scanner
2. Checking the temperature of the Gray_mechanism executive in real time
3. Inspect the wiring harness and connectors for damage
4. Checking the integrity of the actuator temperature sensor
5. Checking the operation of solenoids and electric motors
6. Replacement of faulty components (if necessary)
7. Resetting the error and testing the system

Related codes

Error B3A40 by Vehicle Brand