OBD Guide

B356A

Vehicle Direction Warning Switch Circuit

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

Symptoms

  • The passive safety system fault indicator is on
  • No directional warnings
  • Incorrect operation of security systems

Causes

  • Open or short circuit in wiring harness
  • Direction warning switch malfunction
  • Problems with the control module
  • Contact corrosion
  • Bad connection

How to Fix

  1. Check the wiring harness for damage
  2. Check directional warning switch
  3. Check connections and contacts for corrosion
  4. Replace faulty components if necessary
  5. Reset the error and check if it appears again

Related codes

Error B356A by Vehicle Brand