AutoCodes – Generic – C1744

C1744 Code - Rear Height Control Solenoid Valve Left Circuit Malfunction

Quick Answer

The control valve solenoid assembly consists of each front and rear leveling valve, gate valve and accumulator valve. Common causes include Faulty Rear Height Control Solenoid Valve Left, Rear Height Control Solenoid Valve Left harness is open or shorted, Rear Height Control Solenoid Valve Left 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
C1744 indicates Rear Height Control Solenoid Valve Left Circuit Malfunction.
Common causes
Common causes include Faulty Rear Height Control Solenoid Valve Left, Rear Height Control Solenoid Valve Left harness is open or shorted, Rear Height Control Solenoid Valve Left 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 10,063
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Nov 19, 2020
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Code C1744 Description

The control valve solenoid assembly consists of each front and rear leveling valve, gate valve and accumulator valve. It performs the height control and connects and disconnects the fluid line of the right and left shock absorber by operating the solenoid valve with the control signal from the ECU.
OBDII Code C1744 - Rear Height Control Solenoid Valve Left Circuit Malfunction - AutoCodes.com
C1744 Code - Rear Height Control Solenoid Valve Left Circuit Malfunction

What are the Possible Causes of the DTC C1744?

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

How to Fix the DTC C1744?

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 C1744 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 C1744 code?

Need more information on how to fix the C1744 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1744 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

  • C1744 Lexus β€” Rear Height Control Solenoid Valve Left Circuit Malfunction
  • C1744 Toyota β€” Rear Height Control Solenoid Valve Left Circuit Malfunction
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 C1744 Code

1. What are common symptoms of OBDII code C1744?

- Common symptoms include the rear of the vehicle sitting lower than normal, uneven ride height, and potential issues with the suspension system.

2. What can cause OBDII code C1744 to trigger?

- The code C1744 can be triggered by a malfunction in the rear height control solenoid valve on the left side, wiring issues, or a faulty control module.

3. How can I diagnose the root cause of OBDII code C1744?

- Diagnosing OBDII code C1744 typically involves inspecting the rear height control solenoid valve on the left side, checking the wiring for any damages or loose connections, and using a diagnostic tool to scan the control module for faults.

4. What are the possible repair options for OBDII code C1744?

- Repair options may include replacing the rear height control solenoid valve on the left side, repairing any damaged wiring, or resetting the control module after addressing any issues.

5. Can I still drive my vehicle with OBDII code C1744?

- It is not recommended to drive your vehicle with OBDII code C1744, as it can affect the vehicle's suspension system and overall driving performance.

6. How much does it cost to repair OBDII code C1744?

- The cost of repairing OBDII code C1744 can vary depending on the root cause of the issue, but it may involve parts and labor costs for replacing components or repairing wiring.

7. Is OBDII code C1744 easy to fix as a DIY project?

- Fixing OBDII code C1744 may require advanced automotive knowledge and diagnostic tools, so it is recommended to consult a professional mechanic for proper diagnosis and repair.

8. Can weather or road conditions trigger OBDII code C1744?

- Extreme weather conditions or rough road conditions are not direct triggers for OBDII code C1744, but they can potentially exacerbate existing issues with the rear height control system.

9. How long does it typically take to repair OBDII code C1744?

- The repair time for OBDII code C1744 can vary based on the complexity of the issue, but it may take several hours to diagnose and fix the underlying problem.

10. Are there any preventive measures to avoid OBDII code C1744 in the future?

- Regular maintenance, including checking the suspension system and related components, can help prevent issues that may lead to OBDII code C1744.

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