Engine-Codes.com
Engine-Codes – Infiniti – P0744 Infiniti

P0744 Infiniti Code - Torque Converter Clutch Circuit Intermittent

Quick Answer

The P0744 code in an Infiniti indicates a problem with the Torque Converter Clutch Circuit being intermittent. Common causes include Faulty wiring or connectors in the Torque Converter Clutch Circuit, Malfunctioning torque converter clutch solenoid, Low transmission fluid levels. 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 Infiniti indicates Torque Converter Clutch Circuit Intermittent.
Common causes
Common causes include Faulty wiring or connectors in the Torque Converter Clutch Circuit, Malfunctioning torque converter clutch solenoid, Low transmission fluid levels.
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 08, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0744 Infiniti Description

The P0744 code in an Infiniti indicates a problem with the Torque Converter Clutch Circuit being intermittent. The torque converter is a crucial component in an automatic transmission system that transfers power from the engine to the transmission. The torque converter clutch is responsible for locking the torque converter when the vehicle reaches a certain speed, improving fuel efficiency and preventing slippage.

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

Common Causes of P0744 Infiniti

  1. Faulty wiring or connectors in the Torque Converter Clutch Circuit
  2. Malfunctioning torque converter clutch solenoid
  3. Low transmission fluid levels
  4. Internal transmission damage
  5. Electrical issues in the transmission system

Symptoms of P0744 Infiniti

  1. Check engine light illuminated
  2. Rough or delayed shifting
  3. Decreased fuel efficiency
  4. Transmission overheating
  5. Transmission slipping

How to Fix P0744 Infiniti

  1. Diagnose the issue by using a scan tool to read the code and identify the specific problem within the Torque Converter Clutch Circuit.
  2. Inspect the wiring and connectors for any signs of damage or corrosion. Repair or replace as necessary.
  3. Test the torque converter clutch solenoid to ensure it is functioning properly. Replace if faulty.
  4. Check and top up transmission fluid levels if low. Inspect for any leaks that may have caused the fluid loss.
  5. If the issue persists, further inspection of the transmission system may be required to identify any internal damage that needs repair.

Cost to Fix P0744 Infiniti

The cost of repairing a P0744 code in an Infiniti can vary depending on the extent of the damage and the specific components that need to be replaced. On average, the repair costs for this issue can range from $200 to $600, including parts and labor. It is important to note that diagnosis time and labor rates at auto repair shops can vary, so it is recommended to obtain quotes from multiple sources to get a more accurate estimate. Additionally, factors such as location, vehicle make and model, and engine type can also impact the final cost of the repair.

What does this mean?

Tech Notes for P0744 Infiniti

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.

Need more information about the P0744 Infiniti code?

Need more information on how to fix the P0744 Infiniti code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0744 Infiniti code diagnosed by a professional: Find a repair shop in your area

Information for Specific Infiniti Models

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 Infiniti Code

1. What are the common symptoms of OBDII code P0744 in an Infiniti related to the Torque Converter Clutch Circuit Intermittent?

The common symptoms include erratic shifting, engine stalling at idle, poor fuel economy, and the Check Engine light illuminating on the dashboard.

2. What are the possible causes of OBDII code P0744 in an Infiniti?

The code P0744 in an Infiniti is typically caused by a faulty torque converter clutch solenoid, wiring issues, low transmission fluid level, or a malfunctioning torque converter.

3. How serious is OBDII code P0744 in an Infiniti?

While the car may still be operational with this code, it is important to address it promptly to prevent further damage to the transmission and ensure optimal performance and fuel efficiency.

4. Can I continue driving my Infiniti with OBDII code P0744 present?

It is not advisable to continue driving the vehicle with this code present, as it can lead to further transmission issues and potentially leave you stranded.

5. How can I diagnose OBDII code P0744 in my Infiniti?

Diagnosing this code typically involves using a scan tool to retrieve the specific code, checking the transmission fluid level and condition, inspecting the wiring and connectors, and testing the torque converter clutch solenoid.

6. Can I repair OBDII code P0744 in my Infiniti myself?

While some DIY enthusiasts may attempt to repair this code themselves, it is recommended to consult with a professional mechanic or technician due to the complexity of transmission systems.

7. How much does it cost to repair OBDII code P0744 in an Infiniti?

The cost of repairing this code can vary depending on the underlying cause, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Are there any preventive maintenance tips to avoid OBDII code P0744 in an Infiniti?

Regularly servicing your transmission, checking the fluid levels, and addressing any abnormal symptoms promptly can help prevent issues that may trigger this OBDII code.

9. Can a faulty torque converter cause OBDII code P0744 in an Infiniti?

Yes, a malfunctioning torque converter can contribute to the triggering of OBDII code P0744, as it affects the operation of the torque converter clutch circuit.

10. How long does it take to repair OBDII code P0744 in an Infiniti?

The repair time for this code can vary depending on the specific cause and the availability of parts, but it may take a few hours to a full day for a skilled mechanic to diagnose and address the issue.

Discuss the causes and fixes for P0744 Infiniti OBDII Code

Submit a New Comment

Code P0744 Infiniti comments

No comments found for this page.