OBD Guide

B3A5B

Active Aerodynamic Feature D Position Sensor 2 Circuit Low Voltage

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Incorrect operation of active aerodynamics
  • Check Engine Light Illuminates
  • Poor handling at high speeds

Causes

  • Position sensor malfunction
  • Open or short circuit in wiring harness
  • Sensor power problems
  • Control unit malfunction

How to Fix

  1. Check the integrity of the wiring harness
  2. Check the voltage at the sensor
  3. Replace position sensor if necessary
  4. Check the operation of the control unit

Related codes

Error B3A5B by Vehicle Brand