OBD Guide

B3A27

Active Aerodynamic Feature Control Module A Power Mode Circuit Performance

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

Symptoms

  • Inoperative active aerodynamics elements
  • Check Engine light comes on
  • Reduced aerodynamic efficiency

Causes

  • Wiring harness damage
  • Poor contact in connectors
  • Malfunction of the active aerodynamics module
  • Fuse or relay problems

How to Fix

  1. Check the integrity of the wiring harness
  2. Inspect connectors for oxidation or damage
  3. Check fuses and relays
  4. Test the active aerodynamics module
  5. Replace faulty components

Related codes

Error B3A27 by Vehicle Brand