AutoCodes – Generic – C1788

C1788 Code - Height Control OFF Switch Circuit

Quick Answer

This is the height control system main switch. Common causes include Faulty Height Control OFF Switch, Height Control OFF Switch harness is open or shorted, Height Control OFF Switch circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: C1788 indicates Height Control OFF Switch Circuit.
Common causes: Common causes include Faulty Height Control OFF Switch, Height Control OFF Switch harness is open or shorted, Height Control OFF Switch circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,214

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 26, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code C1788 Description

This is the height control system main switch. When the height control switch is pushed, the height control OFF indicator light lights up, and height control goes off. The OFF condition of the height control will not be canceled until the height control switch is pushed again or the vehicle is driven.

OBDII Code C1788 - Height Control OFF Switch Circuit - AutoCodes.com — C1788 Code - Height Control OFF Switch Circuit

What does this mean?

What are the Possible Causes of the DTC C1788?

Faulty Height Control OFF Switch
Height Control OFF Switch harness is open or shorted
Height Control OFF Switch circuit poor electrical connection
Faulty Suspension Control ECU

How to Fix the DTC C1788?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1788 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the C1788 code?

Need more information on how to fix the C1788 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1788 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1788 Lexus — Height Control OFF Switch Circuit
C1788 Toyota — Height Control OFF Switch Circuit

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C1788 Code

1. What are the common symptoms of OBDII code C1788 (Height Control OFF Switch Circuit)?

The common symptoms include the height control system not functioning properly, the height control switch not responding, and the vehicle's ride height being stuck in one position.

2. What can cause the OBDII code C1788 to trigger?

The code C1788 can be triggered by a faulty height control OFF switch, damaged wiring or connectors in the height control circuit, or a malfunction in the height control module.

3. How can I diagnose the cause of OBDII code C1788?

You can diagnose the cause by inspecting the height control OFF switch for any physical damage, checking the wiring and connectors for continuity and proper connection, and using a diagnostic scanner to read the code and pinpoint the issue.

4. What are some repair tips for addressing OBDII code C1788?

Some repair tips include replacing the height control OFF switch if it is faulty, repairing any damaged wiring or connectors in the circuit, and resetting the height control system following repairs.

5. Can I drive my vehicle with OBDII code C1788 present?

It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to ensure proper functioning of the height control system.

6. How do I reset the OBDII code C1788 after making repairs?

You can reset the code using a diagnostic scanner or by disconnecting the vehicle's battery for a few minutes, which will clear the code and reset the system.

7. Are there any precautions to take when repairing OBDII code C1788?

It is important to disconnect the vehicle's battery before working on the height control system to prevent any electrical issues or malfunctions.

8. Can extreme weather conditions affect OBDII code C1788?

Extreme weather conditions such as heavy rain or extreme cold can potentially impact the height control system and trigger the code C1788. Ensure all components are protected from such conditions.

9. How often does OBDII code C1788 occur in vehicles?

The frequency of OBDII code C1788 occurrences can vary depending on the vehicle make and model, but it is a relatively common issue in vehicles equipped with height control systems.

10. Should I seek professional help to repair OBDII code C1788?

If you are not experienced in diagnosing and repairing automotive electrical systems, it is recommended to seek professional help to accurately diagnose and fix the issue related to code C1788.