OBD Guide

B305D

Challenge Active Circuit

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • Airbag light is on
  • Disabling the restraint system
  • Diagnostic memory error

Causes

  • Open circuit activation
  • Faulty squib
  • Wiring harness damage
  • Poor contact in the connector
  • Airbag module malfunction

How to Fix

  1. Check activation circuit resistance
  2. Inspect the squib for damage
  3. Check the integrity of the wiring harness
  4. Clean contacts in connectors
  5. Replace faulty components

Related codes

Error B305D by Vehicle Brand