OBD Guide

C0323

Open Lock Control Circuit

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • Inability to activate differential lock
  • Flashing lock indicator
  • Switching to emergency mode for some all-wheel drive systems

Causes

  • Broken wire in the wiring harness
  • Malfunction of the locking solenoid valve (solenoid)
  • Damage to connectors
  • Contact corrosion
  • Control module malfunction

How to Fix

  1. Check the wiring harness for damage
  2. Check the resistance of the lock solenoid
  3. Inspect connectors for corrosion
  4. Diagnose the control module

Related codes

Error C0323 by Vehicle Brand