Code Definition

P0744 — Torque Converter Clutch Circuit Intermittent

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0744

P0744 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0744 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0744 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P0744 fault code is activated when the Transmission Control Module (TCM) detects intermittent signals or connectivity issues in the torque converter clutch (TCC) circuit. This circuit is crucial for the operation of the torque converter clutch, which manages the connection between the engine and the transmission in automatic vehicles. An intermittent fault suggests sporadic electrical problems in the circuit, potentially arising from loose connections, intermittent solenoid failures, or wiring issues. These intermittent issues can lead to unpredictable transmission behaviour, such as errat...

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