AutoCodes – Suzuki – P0744 Suzuki

P0744 Suzuki Code - Torque Converter Clutch Solenoid Valve Function

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 Faulty torque converter clutch solenoid valve, Torque converter clutch solenoid valve harness is open or shorted, Torque converter clutch 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: P0744 Suzuki indicates Torque Converter Clutch Solenoid Valve Function.
Common causes: Common causes include Faulty torque converter clutch solenoid valve, Torque converter clutch solenoid valve harness is open or shorted, Torque converter clutch 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 5,261

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 Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0744 Suzuki 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.
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 condition, the engine speed should not change abruptly. If there is a big jump in engine speed, there is no lock-up.

OBDII Code P0744 Suzuki - Torque Converter Clutch Solenoid Valve Function - AutoCodes.com — P0744 Suzuki Code - Torque Converter Clutch Solenoid Valve Function

What does this mean?

What are the Possible Causes of the DTC P0744 Suzuki?

Faulty torque converter clutch solenoid valve
Torque converter clutch solenoid valve harness is open or shorted
Torque converter clutch solenoid valve circuit poor electrical connection
Low transmission fluid level
Dirty transmission fluid

How to Fix the DTC P0744 Suzuki?

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 the a transmission solenoid is working intermittent, 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 is recommend changing the transmission fluid and if possible removing the transmission pan for further diagnosis. Excessive debris or metal particles on the transmission pan could be an indication that there is a transmission mechanical 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 Suzuki 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 Suzuki Code

1. What are common symptoms of OBDII code P0744 in a Suzuki related to the torque converter clutch solenoid valve function?

The common symptoms include engine stalling at stops, difficulty shifting gears, and decreased fuel efficiency.

2. What can cause the OBDII code P0744 in a Suzuki to trigger?

The most common cause is a malfunctioning torque converter clutch solenoid valve, which can be due to electrical issues, a faulty solenoid, or low transmission fluid.

3. How can I diagnose the cause of the OBDII code P0744 in my Suzuki?

You can start by checking the transmission fluid level and condition, testing the torque converter clutch solenoid valve for proper function, and inspecting the wiring and connectors for any damage.

4. What are the repair options for fixing OBDII code P0744 in a Suzuki?

Repair options include replacing the torque converter clutch solenoid valve, repairing any damaged wiring or connectors, and ensuring the transmission fluid is at the correct level and in good condition.

5. Can I continue driving my Suzuki with OBDII code P0744 present?

It's not recommended to continue driving with this code present, as it can lead to further damage to the transmission and potentially result in costly repairs.

6. How much does it typically cost to repair OBDII code P0744 in a Suzuki?

The cost of repair can vary depending on the extent of the issue and whether you choose to do the repair yourself or take it to a professional. It's advisable to get a diagnosis and estimate from a qualified mechanic.

7. Are there any preventive maintenance tips to avoid OBDII code P0744 in a Suzuki?

Regularly checking and maintaining the transmission fluid level and condition, as well as addressing any transmission issues promptly, can help prevent the occurrence of this code.

8. Can a DIY enthusiast fix OBDII code P0744 in a Suzuki?

Depending on your experience and access to tools, it may be possible to fix this issue yourself by following a repair manual or guide specific to your Suzuki model.

9. What is the role of the torque converter clutch solenoid valve in a Suzuki transmission?

The torque converter clutch solenoid valve controls the engagement and disengagement of the torque converter lock-up clutch, which helps improve fuel efficiency and overall transmission performance.

10. Will resetting the OBDII code P0744 in a Suzuki make it go away permanently?

Resetting the code may temporarily clear the check engine light, but if the underlying issue causing the code is not addressed, it is likely to reappear. It's essential to diagnose and repair the root cause of the problem.