OBD Guide
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C1667

4WAS Lock Insertion

C1667 is an OBD-II diagnostic trouble code meaning: 4WAS Lock Insertion. Common causes: lockout solenoid valve malfunction, wiring harness damage. Estimated repair cost: $56–167.

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

Symptoms

  • Check engine light comes on
  • Reduced all-wheel drive efficiency
  • Unstable operation of the all-wheel drive system

Causes

  • Lockout solenoid valve malfunction
  • Wiring harness damage
  • Mechanical failure in the drive system
  • Problems with the control unit

How to Fix

  1. Check the condition of the wiring harness and connectors
  2. Diagnose the blocking solenoid valve
  3. Check the mechanical components of the drive system
  4. Test the control unit for errors

Related codes

C1668C1669

FAQ

What does the C1667 code mean?

C1667 is an OBD-II diagnostic trouble code that indicates: 4WAS Lock Insertion

What causes a C1667 error code?

The most common causes of C1667 include: Lockout solenoid valve malfunction; Wiring harness damage; Mechanical failure in the drive system; Problems with the control unit.

How do I fix a C1667 diagnostic trouble code?

To fix C1667: Check the condition of the wiring harness and connectors. Diagnose the blocking solenoid valve. Check the mechanical components of the drive system. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1667?

Limited driving only, diagnose soon

How much does it cost to fix C1667?

The estimated repair cost for C1667 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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