DTC P0744 Torque Converter Clutch Circuit Intermittent

In the intricate realm of a vehicle’s transmission, the Diagnostic Trouble Code (DTC) P0744 carries notable significance. Today, we explore the meaning, causes, symptoms, diagnostic methods, and effective solutions tied to the intermittent issue within the Torque Converter Clutch (TCC) Circuit indicated by the P0744 code.

1. What does P0744 code mean?

The P0744 code specifically indicates an intermittent malfunction within the Torque Converter Clutch (TCC) circuit, as detected by the Transmission Control Module (TCM). It highlights sporadic irregularities affecting the engagement or disengagement of the TCC within the torque converter.

2. What are the causes of DTC P0744?

The activation of the P0744 code can be attributed to various factors, including:

  • Faulty Torque Converter Clutch Solenoid: Malfunctioning solenoids responsible for TCC engagement or disengagement.
  • Intermittent Wiring or Connector Issues: Intermittent faults within the wiring or connectors of the TCC circuit.
  • Low Transmission Fluid Levels: Inadequate fluid levels impacting TCC operation intermittently.
  • Contaminated Transmission Fluid: Impurities affecting TCC engagement intermittently.
  • Internal Mechanical Issues: Intermittent problems within the torque converter components impacting TCC function.

3. What are the symptoms of DTC P0744?

When the P0744 code intermittently appears, several symptoms might arise, including:

  • Intermittent Check Engine Light Activation: Periodic illumination of the check engine light indicating an intermittent TCC circuit issue.
  • Occasional Harsh Shifting: Abrupt or irregular gear shifting during intermittent TCC engagement problems.
  • Fluctuating Fuel Efficiency: Inconsistent fuel efficiency due to intermittent TCC operation.
  • Infrequent Transmission Overheating: Occasional overheating of the transmission system due to intermittent TCC-related faults.

4. How to diagnose DTC P0744?

For an accurate diagnosis related to the intermittent TCC circuit issue:

  • OBD-II Scan: Utilize a diagnostic scanner to retrieve the P0744 code and any accompanying codes for a comprehensive assessment.
  • Inspect Wiring and Connectors: Thoroughly examine the wiring and connectors related to the TCC for intermittent faults, corrosion, or loose connections.
  • Test Torque Converter Clutch Solenoid: Evaluate the functionality of the TCC solenoid during intermittent periods to identify irregularities.

5. How to fix DTC P0744 problem?

Resolving the P0744 code associated with the intermittent TCC circuit issue involves:

  • Repair or Replace Solenoid: Address issues with the TCC solenoid by repairing or replacing it if intermittent faults are detected.
  • Fix Intermittent Wiring or Connector Issues: Rectify intermittent faults in wiring or connectors affecting the TCC circuit.
  • Transmission Fluid Maintenance: Ensure transmission fluid levels and quality meet manufacturer specifications consistently.
  • Clear the DTC: Utilize a diagnostic scanner to clear the trouble code after resolving intermittent issues within the TCC circuit.


The P0744 code indicating an intermittent Torque Converter Clutch Circuit issue requires prompt attention to maintain the functionality of your vehicle’s transmission. Understanding its causes, symptoms, diagnostic procedures, and effective solutions empowers you to efficiently address this issue, restoring optimal performance and ensuring consistent engagement and disengagement of the TCC.

Seeking assistance from certified auto technicians is advisable for accurate diagnosis and resolution of DTC issues related to the intermittent Torque Converter Clutch Circuit problem. Stay informed, but rely on expert guidance when necessary to ensure your vehicle operates at its best.