AutoCodes – Generic – C1764

C1764 Code - Abnormal Leveling Valve Oil Pressure

Quick Answer

The solenoid valve is located in the No. Common causes include Faulty No, 1 height control valve, Clog in the fluid line. 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: C1764 indicates Abnormal Leveling Valve Oil Pressure.
Common causes: Common causes include Faulty No, 1 height control valve, Clog in the fluid line.
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 1,539

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 C1764 Description

The solenoid valve is located in the No. 1 height control valve. When the vehicle height is adjusted, the fluid line is opened or closed according to the signal from the suspension control ECU. If the height control pump and motor activates when the fluid line is closed due to the solenoid valve malfunctioning, the solenoid valve being stuck, or foreign matter clogging the fluid line, fluid pressure increases abnormally. When this problem with the fluid pressure is detected, DTC C1764 and/or DTC C1765 is stored.

OBDII Code C1764 - Abnormal Leveling Valve Oil Pressure - AutoCodes.com — C1764 Code - Abnormal Leveling Valve Oil Pressure

What does this mean?

What are the Possible Causes of the DTC C1764?

Faulty No. 1 height control valve
Clog in the fluid line
Suspension Control ECU

How to Fix the DTC C1764?

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 C1764 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 C1764 code?

Need more information on how to fix the C1764 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1764 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1764 Lexus — Abnormal Leveling Valve Oil Pressure
C1764 Toyota — Abnormal Leveling Valve Oil Pressure

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 C1764 Code

1. What are the common symptoms of OBDII code C1764 (Abnormal Leveling Valve Oil Pressure)?

- Common symptoms include uneven vehicle height, rough or bouncy ride, and illuminated dashboard warning lights related to suspension or leveling issues.

2. What are the potential causes of OBDII code C1764?

- Causes may include a malfunctioning leveling valve, low oil pressure in the leveling system, damaged wiring or connectors, or a faulty control module.

3. How can I diagnose the cause of OBDII code C1764?

- Use a diagnostic scanner to read and interpret the code, inspect the leveling valve and oil pressure in the system, check for wiring or connector damage, and perform a visual inspection of the suspension components.

4. Is it safe to drive with OBDII code C1764 triggered?

- It is not recommended to drive with this code active, as it can affect the vehicle's handling and stability. It is best to address the issue promptly to ensure safe operation.

5. Can I reset OBDII code C1764 myself?

- You can attempt to clear the code with a diagnostic scanner, but it is crucial to address the underlying issue causing the code to prevent it from reoccurring.

6. What are some repair tips for OBDII code C1764?

- Repair tips may include checking and adjusting the leveling valve, ensuring proper oil pressure in the system, repairing or replacing damaged wiring, and resetting the code after addressing the issue.

7. How much does it typically cost to repair OBDII code C1764?

- The cost of repair can vary depending on the cause of the issue, the parts needed, and labor costs. It is recommended to consult with a professional mechanic for an accurate estimate.

8. Can OBDII code C1764 be a DIY fix?

- Depending on your automotive knowledge and skills, some aspects of addressing this code, such as checking wiring or connectors, may be DIY-friendly. However, complex repairs involving the leveling system may require professional assistance.

9. Will OBDII code C1764 affect my vehicle's performance?

- Yes, this code can impact the vehicle's performance by causing handling issues, a rough ride, and potential safety concerns related to suspension stability.

10. How often does OBDII code C1764 occur in vehicles?

- OBDII code C1764 related to abnormal leveling valve oil pressure is relatively common in vehicles equipped with leveling systems, particularly in older models or those with high mileage.