P0744 - OBD Trouble Code

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When your vehicles show the OBD-II error code P0744 don’t worry. It basically means that the PCM noted an intermittent abnormality in the torque converter clutch circuit.

In a vehicle the automatic transmission needs a specific amount of torque converter “lock up”. This will be subject to vehicle and its specifications. If the detected lock-up isn’t in sync with the necessary amount needed, then the system will assume malfunction in the torque converter clutch circuit. It will then direct the Powertrain Control Module or OCM to store P0744 error code.

What causes this problem with the Torque Converter Clutch Circuit Intermittent?

• Blocked passages of the internal transmission fluid
• Failure of Mechanical internal transmission
• Low transmission fluid found
• Torque converter clutch solenoid valve harness are open or shorted
• Torque converter clutch solenoid valve circuit showing poor electrical connection
• Contaminated transmission fluid
• Transmission control module, or TCM faulty

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Willing to know some common symptoms of OBD Code P0744? Your wish is our demand. Have a look at them below:

Common Symptoms

• Harsh shifting of the transmission
• Overheating of Transmission overheating
• Slippage of transmission slippage
• Decreased efficiency of fuel

Learn the ways with which you can correct this trouble code:

• Torque converter will have to be totally rebuilt, fluid flushed and replaced.
• Repair or replace shorted or burned wires
• Replace full internal transmission harness if faulty
• Fill the transmission with the correct fluid
• Replace damaged transmission pump
• System circuitry, connectors, and/or components that don’t comply with manufacturer's secs will have to be repaired or replaced
• Repair or replace system circuits/connectors as required
• Replace the entire Powertrain Control Module

Don’t get tensed if you are still facing any of these issues as we care for our customers and that’s why we offer a good range of Transmission Fluid, Engine Coolant Temperature Sensor, Torque Converter Clutch Solenoid, Torque Converter Clutch Solenoid Valve harness, Valve Body, Transmission Control Module and a lot more. We are sure that now all your issues would be resolved.

If you want to easily diagnose this fault code, then all you have to do is to follow the steps which are mentioned below:

Once you have discovered that your vehicle system has encountered an issue that triggered P0744 error code, you can start with your diagnosis. Visually inspect the transmission fluid levels and its condition. The most commonly found reason that causes this error code is an obstruction caused in the transmission valve due to contaminated transmission fluid. These debris cause difficulty for the fluid to flow through and it all builds up till it’s finally fully blocked. You will have to either change the dirty fluid yourself or have your mechanic do it for you. Be thorough and ensure that the fluid doesn’t have any burnt smell. Also, check if there’s a lack of proper pressure.

After having replaced the transmission fluid correctly, the code should clear up from the PCM. The system should also reset. However, if the code returns then others tests will have to be run by the mechanic to determine the cause of this error code.

Common mistakes when diagnosing the P0744 code

Certain mistakes can occur while diagnosing this OBD code. One of the most common misdiagnoses is overlooking malfunctions in the torque converter clutch wiring. Even many trained mechanicalness will sometimes replace lock up solenoids or torque converters in error. This happens because they tend to forget to consider the potential wiring issues. Another tricky part in this OBD code is that every time a repair is made the system has to be retested. When testing is conducted after every repair attempt, the check engine light will stop appearing, however if it continues to light up even after repairs are being made, then chances are that there's an intermittent issue. This will require a stringent inspection and accordingly will have to be repaired.