AutoCodes – Lexus – C1739 Lexus

C1739 Lexus Code - Right Rear Height Control Solenoid Valve Circuit

Quick Answer

The Suspension Electronic Control Unit (ECU) energizes the height control solenoid valve, which opens the valve and leads compressed air to the pneumatic cylinder, thus raising the vehicle height. Common causes include Faulty Right Rear Height Control Solenoid Valve, Right Rear Height Control Solenoid Valve harness is open or shorted, Right Rear Height Control Solenoid Valve 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: C1739 Lexus indicates Right Rear Height Control Solenoid Valve Circuit.
Common causes: Common causes include Faulty Right Rear Height Control Solenoid Valve, Right Rear Height Control Solenoid Valve harness is open or shorted, Right Rear Height Control Solenoid Valve 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.

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Code Popularity 883

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 19, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1739 Lexus Description

The Suspension Electronic Control Unit (ECU) energizes the height control solenoid valve, which opens the valve and leads compressed air to the pneumatic cylinder, thus raising the vehicle height. When the vehicle height is lowered, the ECU energizes not only the height control solenoid valve but also the exhaust valve which open the valve and discharge the compressed air in the pneumatic cylinder to the atmosphere. Front and rear height control valves have 2 solenoid valves to control right hand and left hand pneumatic cylinders separately. The exhaust valve is located on the compressor unit, and has one valve only.

OBDII Code C1739 Lexus - Right Rear Height Control Solenoid Valve Circuit - AutoCodes.com — C1739 Lexus Code - Right Rear Height Control Solenoid Valve Circuit

What does this mean?

What are the Possible Causes of the DTC C1739 Lexus?

Faulty Right Rear Height Control Solenoid Valve
Right Rear Height Control Solenoid Valve harness is open or shorted
Right Rear Height Control Solenoid Valve circuit poor electrical connection
Faulty Suspension Electronic Control Unit (ECU)

How to Fix the DTC C1739 Lexus?

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 C1739 Lexus 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 C1739 Lexus code?

Need more information on how to fix the C1739 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1739 Lexus code diagnosed by a professional: Find a repair shop in your area

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.