AutoCodes – Generic – C1766

C1766 Code - Height Control Pump Motor Current

Quick Answer

In case that the height control has not finished in spite of performing the raise control for a certain period of time, the ECU interrupts the height control. Common causes include Fluid leakage, Faulty No, 1 height control valve. 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: C1766 indicates Height Control Pump Motor Current.
Common causes: Common causes include Fluid leakage, Faulty No, 1 height control valve.
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.

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Code Popularity 4,990

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 22, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1766 Description

In case that the height control has not finished in spite of performing the raise control for a certain period of time, the ECU interrupts the height control.

OBDII Code C1766 - Height Control Pump Motor Current - AutoCodes.com — C1766 Code - Height Control Pump Motor Current

What does this mean?

What are the Possible Causes of the DTC C1766?

Fluid leakage
Faulty No. 1 height control valve
Faulty Suspension control relay
Faulty Height control pump and motor
Clog in the fluid line
Faulty Suspension control ECU

How to Fix the DTC C1766?

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 C1766 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 C1766 code?

Need more information on how to fix the C1766 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1766 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1766 Lexus — Height Control Pump Motor Current
C1766 Toyota — Height Control Pump Motor Current

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 C1766 Code

1. What are the common symptoms of OBDII code C1766 (Height Control Pump Motor Current)?

- Common symptoms include issues with the vehicle's ride height adjustments, uneven suspension, and warning lights related to the height control system.

2. What are the possible causes of OBDII code C1766?

- The code C1766 is typically triggered by a malfunction in the height control pump motor, such as a motor failure, wiring issues, or a faulty pump assembly.

3. How can I diagnose the cause of OBDII code C1766?

- Diagnosing the code usually involves checking the wiring connections to the height control pump motor, testing the motor for proper function, and inspecting the pump assembly for any signs of damage.

4. Can I still drive my vehicle with OBDII code C1766 present?

- It's not recommended to drive the vehicle with code C1766 active, as it can affect the suspension system's performance and potentially lead to further damage.

5. How can I repair OBDII code C1766 on my own?

- Repairing the code may involve replacing the height control pump motor, repairing any damaged wiring, or addressing any issues with the pump assembly. It's recommended to consult a professional for accurate diagnosis and repair.

6. Are there any temporary fixes for OBDII code C1766?

- Temporary fixes like resetting the system or clearing the code may temporarily resolve the issue, but it's crucial to address the root cause of the problem to prevent it from recurring.

7. Is OBDII code C1766 a common issue in certain vehicle makes and models?

- OBDII code C1766 is more commonly found in vehicles equipped with height control systems for adjustable suspension, typically in luxury or off-road vehicles.

8. Can a faulty height control pump motor cause other issues besides triggering code C1766?

- Yes, a malfunctioning height control pump motor can lead to poor ride quality, uneven suspension, and potential safety hazards due to improper vehicle height adjustments.

9. How much does it typically cost to repair OBDII code C1766 at a repair shop?

- The cost of repairing code C1766 can vary depending on the extent of the issue, the labor rates of the repair shop, and the cost of any replacement parts needed, so it's best to get a quote from a professional.

10. Will OBDII code C1766 cause my vehicle to fail an emissions test?

- While code C1766 is related to the height control system and not emissions, it's still important to address and resolve the issue to ensure the overall performance and safety of the vehicle.