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P0744 2006 Infiniti G35 Code - Torque Converter Clutch Circuit Intermittent

Quick Answer

The P0744 diagnostic trouble code (DTC) specifically pertains to the torque converter clutch circuit in a 2006 Infiniti G35. Common causes include Malfunctioning torque converter clutch solenoid, Damaged or corroded wiring in the TCC circuit, Low transmission fluid levels or contaminated fluid. 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
P0744 2006 Infiniti G35 indicates Torque Converter Clutch Circuit Intermittent.
Common causes
Common causes include Malfunctioning torque converter clutch solenoid, Damaged or corroded wiring in the TCC circuit, Low transmission fluid levels or contaminated fluid.
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 15, 2024
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Code P0744 2006 Infiniti G35 Description

The P0744 diagnostic trouble code (DTC) specifically pertains to the torque converter clutch circuit in a 2006 Infiniti G35. The torque converter is a critical component of an automatic transmission system, responsible for transferring power from the engine to the transmission. The torque converter clutch (TCC) is designed to lock the torque converter when the vehicle is cruising at a consistent speed, improving fuel efficiency and reducing heat generation within the transmission.

OBDII Code P0744 2006 Infiniti G35 - Torque Converter Clutch Circuit Intermittent
P0744 2006 Infiniti G35 Code - Torque Converter Clutch Circuit Intermittent

Common Causes of P0744 2006 Infiniti G35

  1. Malfunctioning torque converter clutch solenoid.
  2. Damaged or corroded wiring in the TCC circuit.
  3. Low transmission fluid levels or contaminated fluid.
  4. Faulty TCC valve.
  5. Issues with the PCM or transmission control module.

Symptoms of P0744 2006 Infiniti G35

  1. Engine stalling at stoplights or when coming to a stop.
  2. Difficulty shifting gears or delayed shifting.
  3. Decreased fuel efficiency.
  4. Illumination of the Check Engine Light.
  5. Harsh or erratic shifting patterns.

How to Fix P0744 2006 Infiniti G35

  1. Begin by conducting a thorough inspection of the TCC circuit, including the solenoid, wiring, and connections. Repair or replace any damaged components.
  2. Check the transmission fluid level and condition. Top off or replace the fluid if necessary.
  3. Test the TCC solenoid and valve for proper operation. Replace if found to be faulty.
  4. Clear the DTC from the PCM memory using a diagnostic scan tool.
  5. Test drive the vehicle to ensure that the issue has been resolved and that the TCC is engaging properly.

Cost to Fix P0744 2006 Infiniti G35

The cost of repairing a P0744 code in a 2006 Infiniti G35 can vary depending on the specific cause of the issue. On average, the parts required for this repair, such as a TCC solenoid or valve, can range from $100 to $300. Labor costs typically add another $100 to $200 to the total bill. Therefore, the total repair cost could fall between $200 and $500. It's important to note that these estimates are general and can fluctuate based on the location of the repair shop, the expertise of the technician, and any additional repairs or services needed. It's recommended to obtain quotes from multiple sources to ensure a competitive price.

What does this mean?

Tech Notes for P0744 2006 Infiniti G35

When a transmission solenoid is working intermittently, in most cases, the problem is not the electrical part of the solenoid; the problem is foreign material obstructing the mechanical function of the solenoid or the flow of the fluid through the transmission valve body. If the transmission fluid is very dirty, it's recommended to change the transmission fluid and, if possible, remove the transmission pan for further diagnosis. Excessive debris or metal particles on the transmission pan could be an indication that there is a mechanical transmission failure, and that the transmission will need to be rebuilt or replaced.

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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 P0744 2006 Infiniti G35 Code

1. What are the common symptoms of OBDII code P0744 in a 2006 Infiniti G35?

The common symptoms of code P0744 in a 2006 Infiniti G35 include engine stalling at stops, decreased fuel efficiency, and difficulty shifting gears.

2. What does the OBDII code P0744 on a 2006 Infiniti G35 indicate?

Code P0744 on a 2006 Infiniti G35 indicates an intermittent issue with the torque converter clutch circuit, affecting the operation of the vehicle's transmission.

3. What are the possible causes of OBDII code P0744 in a 2006 Infiniti G35?

Common causes of code P0744 in a 2006 Infiniti G35 include a faulty torque converter clutch solenoid, damaged wiring or connectors, low transmission fluid levels, or internal transmission issues.

4. How can I diagnose the OBDII code P0744 on my 2006 Infiniti G35?

Diagnosing code P0744 involves using an OBDII scanner to retrieve the code, inspecting the transmission fluid level and condition, checking for damaged wiring or connectors, and testing the torque converter clutch solenoid.

5. Can I continue driving my 2006 Infiniti G35 with OBDII code P0744?

It is not recommended to continue driving your 2006 Infiniti G35 with code P0744, as it can lead to further transmission damage and potential safety issues. It is best to address the underlying problem promptly.

6. How can I repair OBDII code P0744 in my 2006 Infiniti G35?

Repairing code P0744 may involve replacing the torque converter clutch solenoid, repairing damaged wiring or connectors, ensuring proper transmission fluid levels, or addressing any internal transmission issues.

7. Is it possible to reset the OBDII code P0744 in a 2006 Infiniti G35?

While you can clear the code with an OBDII scanner, it is crucial to diagnose and address the root cause of the issue triggering code P0744 to prevent it from reoccurring.

8. Can a DIY enthusiast fix OBDII code P0744 in a 2006 Infiniti G35?

Depending on your skill level and access to tools, some DIY enthusiasts may be able to address code P0744 by replacing the torque converter clutch solenoid or checking for damaged wiring. However, complex transmission issues may require professional assistance.

9. How much does it cost to repair OBDII code P0744 in a 2006 Infiniti G35?

The cost of repairing code P0744 in a 2006 Infiniti G35 can vary depending on the underlying issue, parts needed, and labor costs. It is recommended to obtain quotes from reputable repair shops for an accurate estimate.

10. Will OBDII code P0744 cause my 2006 Infiniti G35 to fail an emissions test?

Code P0744 may trigger the check engine light, which could result in a failed emissions test. It is advisable to address the issue causing the code before undergoing an emissions test to ensure compliance.

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