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C1739 Lexus Code - Right Rear Height Control Solenoid Valve Circuit

Quick Answer

The C1739 diagnostic trouble code (DTC) for Lexus vehicles refers to an issue with the Right Rear Height Control Solenoid Valve Circuit. Common causes include Wiring harness damage or corrosion, Connector issues, such as poor contact or corrosion, Solenoid valve failure or malfunction. 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
C1739 Lexus indicates Right Rear Height Control Solenoid Valve Circuit.
Common causes
Common causes include Wiring harness damage or corrosion, Connector issues, such as poor contact or corrosion, Solenoid valve failure or malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code C1739 Lexus Description

The C1739 diagnostic trouble code (DTC) for Lexus vehicles refers to an issue with the Right Rear Height Control Solenoid Valve Circuit. This code indicates a problem with the solenoid valve that controls the height of the right rear suspension in vehicles equipped with an adjustable air suspension system. The height control solenoid valve is responsible for regulating the air pressure in the right rear air spring, which in turn adjusts the vehicle's ride height based on driving conditions and load.

OBDII Code C1739 Lexus - Right Rear Height Control Solenoid Valve Circuit
C1739 Lexus Code - Right Rear Height Control Solenoid Valve Circuit

Common Causes of C1739 Lexus

  1. Wiring harness damage or corrosion.
  2. Connector issues, such as poor contact or corrosion.
  3. Solenoid valve failure or malfunction.
  4. Suspension control module failure or communication issues.
  5. Electrical system faults, such as blown fuses or relay problems.

Symptoms of C1739 Lexus

  1. Uneven ride height between the right rear wheel and the rest of the vehicle.
  2. Abnormal suspension behavior, such as sagging or bouncing.
  3. Warning lights illuminated on the dashboard related to the suspension system.
  4. Rough or harsh ride quality, especially on uneven road surfaces.
  5. Difficulty maintaining control and stability while driving, especially during cornering or braking.

How to Fix C1739 Lexus

  1. Begin by conducting a thorough visual inspection of the wiring harness, connectors, and solenoid valve for any signs of damage or corrosion.
  2. Use a multimeter to test the continuity of the wiring and check for proper voltage at the solenoid valve.
  3. If wiring or connectors are damaged, repair or replace them as needed.
  4. Replace the right rear height control solenoid valve if it is found to be faulty.
  5. Clear the DTC from the vehicle's memory using a diagnostic scan tool and perform a test drive to ensure the issue has been resolved.

Cost to Fix C1739 Lexus

The cost of repairing the Right Rear Height Control Solenoid Valve Circuit can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. In general, the cost of parts for this repair can range from $100 to $300, while labor costs can range from $150 to $300. Overall, the total repair cost may fall between $250 and $600. It's important to note that these estimates are approximate and can vary based on the location, vehicle make and model, and the extent of the repair needed. It's recommended to obtain quotes from local auto repair shops to get a more accurate cost estimate for this repair.

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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 C1739 Lexus Code

1. What are common symptoms of OBDII code C1739 in a Lexus related to the Right Rear Height Control Solenoid Valve Circuit?

The common symptoms include uneven ride height, vehicle leaning to one side, and suspension issues in the right rear of the vehicle.

2. What are the possible causes of OBDII code C1739 in a Lexus?

Possible causes include a faulty right rear height control solenoid valve, damaged wiring or connectors in the circuit, or a malfunctioning height control sensor.

3. How can I diagnose the cause of OBDII code C1739 in my Lexus?

Diagnosis typically involves checking the right rear height control solenoid valve for proper operation, inspecting the wiring and connectors for any damage, and testing the height control sensor.

4. Can I still drive my Lexus with OBDII code C1739 present?

It is not recommended to drive the vehicle with this code present, as it can affect the stability and safety of the vehicle's suspension system.

5. How can I repair OBDII code C1739 in my Lexus related to the Right Rear Height Control Solenoid Valve Circuit?

Repairing the issue may involve replacing the right rear height control solenoid valve, repairing any damaged wiring or connectors, or recalibrating the height control system.

6. Is it possible to reset OBDII code C1739 in a Lexus without fixing the underlying issue?

While you can clear the code using an OBDII scanner, it is important to address the root cause of the problem to prevent it from recurring.

7. How much does it typically cost to repair OBDII code C1739 in a Lexus at a dealership or repair shop?

The cost of repair can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Are there any preventive maintenance steps I can take to avoid OBDII code C1739 in my Lexus?

Regularly inspecting and maintaining the suspension system, including the height control components, can help prevent issues that may trigger this OBDII code.

9. Will OBDII code C1739 cause any other problems in my Lexus if left unaddressed?

Leaving this code unaddressed can lead to further suspension issues, potential safety concerns, and negatively impact the vehicle's overall ride comfort and handling.

10. Can I fix OBDII code C1739 in my Lexus by myself, or do I need to take it to a professional mechanic?

While some DIY enthusiasts may be able to diagnose and repair this issue, it is recommended to consult a professional mechanic or dealership for accurate diagnosis and proper repair of the Right Rear Height Control Solenoid Valve Circuit.

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