AutoCodes – Nissan – P0744 2006 Nissan Altima Sedan

P0744 2006 Nissan Altima Sedan Code - Torque Converter Clutch Circuit Intermittent

Quick Answer

The Torque Converter Clutch (TCC) solenoid valve is activated, with the gear in D4, by the Transmission Control Module (TCM) in response to signals sent from the vehicle speed and the Engine Control Module (ECM). Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Torque Converter Clutch (TCC) Solenoid Valve. 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 Nissan Altima Sedan indicates Torque Converter Clutch Circuit Intermittent.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Torque Converter Clutch (TCC) Solenoid Valve.
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 9,423

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 Sep 29, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0744 2006 Nissan Altima Sedan Description

The Torque Converter Clutch (TCC) solenoid valve is activated, with the gear in D4, by the Transmission Control Module (TCM) in response to signals sent from the vehicle speed and the Engine Control Module (ECM). Lock-up piston operation will then be controlled. When the torque converter clutch solenoid valve is activated, the torque converter lockup clutch will engage creating a 1 to 1 RPM ratio between the transmission input shaft and the rotational speed of the torque converter.
The lock-up operation, however, is prohibited when A/T fluid temperature is too low.
When the accelerator pedal is depressed (less than 2/8) in lock-up conditions, the engine speed should not change abruptly. If there is a big jump in engine speed, there is no lock-up.
The Diagnostic Trouble Code (DTC) P0744 is detected when A/T cannot perform lock-up even if the electrical circuit is good.

OBDII Code P0744 2006 Nissan Altima Sedan - Torque Converter Clutch Circuit Intermittent - AutoCodes.com — P0744 2006 Nissan Altima Sedan Code - Torque Converter Clutch Circuit Intermittent

What does this mean?

What are the Possible Causes of the DTC P0744 2006 Nissan Altima Sedan?

Low transmission fluid level
Dirty transmission fluid
Faulty Torque Converter Clutch (TCC) Solenoid Valve
Torque Converter Clutch Solenoid Valve harness is open or shorted
Torque Converter Clutch Solenoid Valve circuit poor electrical connection

How to Fix the DTC P0744 2006 Nissan Altima Sedan?

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 does this mean?

Code Tech Notes

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0744 2006 Nissan Altima Sedan 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.

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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 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P0744 in a 2006 Nissan Altima Sedan?

- Common symptoms include poor fuel economy, transmission slipping, harsh shifting, and the Check Engine light illuminating.

2. What does OBDII code P0744 on a 2006 Nissan Altima Sedan indicate?

- OBDII code P0744 indicates a problem with the Torque Converter Clutch Circuit Intermittent.

3. What are some possible causes of OBDII code P0744 in a 2006 Nissan Altima Sedan?

- Possible causes include a faulty torque converter clutch solenoid, wiring issues, a malfunctioning TCM, or low transmission fluid.

4. How can I diagnose the cause of OBDII code P0744 in my 2006 Nissan Altima Sedan?

- Diagnosing the issue may require a scan tool to check for related trouble codes, testing the torque converter clutch solenoid, inspecting the wiring, and ensuring proper transmission fluid levels.

5. Can I continue driving my 2006 Nissan Altima Sedan with OBDII code P0744 present?

- It is not recommended to continue driving with code P0744 present, as it can lead to further damage to the transmission and potentially more costly repairs.

6. How can I repair OBDII code P0744 in my 2006 Nissan Altima Sedan?

- Repair options may vary depending on the exact cause, but common solutions include replacing the torque converter clutch solenoid, repairing any damaged wiring, or addressing low transmission fluid levels.

7. Is it possible to reset OBDII code P0744 in a 2006 Nissan Altima Sedan without fixing the underlying issue?

- While you can clear the code temporarily, it will likely return until the root cause of the problem is identified and repaired.

8. Can a DIY enthusiast fix OBDII code P0744 in a 2006 Nissan Altima Sedan?

- Depending on your skill level and access to tools, some DIY enthusiasts may be able to address simpler causes like checking and replacing the torque converter clutch solenoid.

9. How much does it typically cost to repair OBDII code P0744 in a 2006 Nissan Altima Sedan at a mechanic?

- Repair costs can vary widely depending on the exact cause of the issue, but expect to pay anywhere from $200 to $800 for parts and labor.

10. How long does it usually take to repair OBDII code P0744 in a 2006 Nissan Altima Sedan?

- The repair time can also vary based on the specific problem, but most repairs related to OBDII code P0744 can be completed in a few hours to a full day at a mechanic's shop.