OBD Guide
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C1788

Height Control OFF Switch Circuit

C1788 is an OBD-II diagnostic trouble code meaning: Height Control OFF Switch Circuit. Common causes: open or short circuit in the switch circuit, height adjustment switch malfunction. 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 Is On
  • The height adjustment system does not work
  • The car can remain in one position (height is not adjustable)

Causes

  • Open or short circuit in the switch circuit
  • Height adjustment switch malfunction
  • Wiring harness damage
  • Problems with the suspension control unit (ECU)

How to Fix

  1. Check the continuity of the height adjustment switch circuit
  2. Check the condition of the wiring harness for damage
  3. Test the height adjustment switch
  4. If necessary, replace the switch or repair the wiring harness
  5. Reset the error and check the system operation

Related codes

C1780C1785C1790

FAQ

What does the C1788 code mean?

C1788 is an OBD-II diagnostic trouble code that indicates: Height Control OFF Switch Circuit

What causes a C1788 error code?

The most common causes of C1788 include: Open or short circuit in the switch circuit; Height adjustment switch malfunction; Wiring harness damage; Problems with the suspension control unit (ECU).

How do I fix a C1788 diagnostic trouble code?

To fix C1788: Check the continuity of the height adjustment switch circuit. Check the condition of the wiring harness for damage. Test the height adjustment switch. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1788?

Limited driving only, diagnose soon

How much does it cost to fix C1788?

The estimated repair cost for C1788 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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