P1744 Hyundai Sonata Hybrid

P1744 Hyundai Sonata Hybrid

P1744 Hyundai Sonata Hybrid: The Hyundai Sonata Hybrid has earned a reputation for its powerful engine and environmentally friendly design. It may have problems now and again, but that’s to be expected with any vehicle. The transmission system in a Sonata Hybrid may display error code P1744 if there is an issue.

This article will explore the “P1744 Hyundai Sonata Hybrid” and its possible causes and resolutions. Owners and enthusiasts of the Sonata Hybrid can benefit from a deeper understanding of this transmission-related problem number.

What is the P1744 Error Code?

Transmission problems in the Hyundai Sonata Hybrid are indicated by the P1744 diagnostic trouble code (DTC). This error message means that the transmission is having problems with the torque converter clutch (TCC). The TCC controls the torque converter’s clutch engagement and disengagement to maximize efficiency and prevent slippage.

P1744 Error: Possible Root Causes

Several problems with the Hyundai Sonata Hybrid can result in the P1744 error message. Some examples are:

Torque converter clutch (TCC) solenoid malfunction: this component regulates TCC engagement and disengagement. The solenoid may be at fault if the P1744 error message displays.

The transmission control module (TCM) failed to properly initialize due to a lack of or degradation of transmission fluid, which caused an error.

Torque converter failure (TCC): The TCC may fail to function properly if the torque converter is damaged.

Problems within the transmission itself can potentially trigger the P1744 error code, such as worn clutches or faulty valve bodies.

The P1744 Error and Its Manifestations

Hyundai Sonata Hybrid drivers may face a wide range of issues when the P1744 code is set off.

The check engine light on the dashboard will turn on to notify the driver when there is a transmission-related fault.

Rough shifting or delayed engagement: The transmission may exhibit harsh shifting or delayed engagement, diminishing the smoothness of the driving experience.

Since the TCC is in charge of optimizing fuel economy, any problems with it can result in subpar efficiency.

Incorrect TCC functioning can lead to excessive friction, which can lead to the transmission overheating in some situations, which is indicated by the problem code.

How to Fix Error P1744?

Most of the time, you’ll need expert help to fix the P1744 problem code in your Hyundai Sonata Hybrid. Some possible approaches are listed below.

A qualified technician will use a diagnostic scan device to extract the error code and collect additional data for analysis to determine the root cause.

The technician will examine the transmission fluid level and quality. They will change the fluid and filter if needed.

Solenoid testing and replacement: Malfunctioning solenoids will be located and replaced as needed to restore full TCC operation.

If the torque converter is suspected of being broken, it should be inspected or changed out.

In more serious circumstances, when transmission problems are discovered on the inside, it may be necessary to repair or replace the transmission.


Hyundai Sonata Hybrid owners may be unpleasantly surprised to see the P1744 error code, but being aware of the possible causes and symptoms may allow them to address the issue more quickly. Owners of the Sonata Hybrid can get back to peak performance with the transmission by consulting a specialist and using the proper measures indicated above.

Error codes like this one can often be avoided with just some preventative maintenance on your vehicle. Keep in mind that a properly functioning transmission is essential to the safe and efficient operation of your Hyundai Sonata Hybrid.

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