P0744 Torque Converter Clutch Circuit Intermittent

P0744 indicates an intermittent torque converter clutch circuit fault. The TCC control path or response drops out inconsistently instead of failing all the time.

Code status

Needs verification

Not yet verified against SAE J2012_202509 / J2012DA. Treat unverified rows as a lookup aid, not repair authority.

System: Transmission
Scope: iso-sae-controlled-p0
Standard: SAE J2012 / ISO 15031-6
Source: legacy-import

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not clear an intermittent TCC code without a heat and vibration check; intermittent wiring can return after a short drive.

Useful checks before replacing parts

Review freeze-frame data and TCC slip history to identify speed, temperature, and load when the intermittent fault occurs.
Inspect transmission connectors, internal harness, solenoid connector fit, and wiring that may open under heat or vibration.
Road-test while monitoring TCC command, slip RPM, and solenoid state under the conditions that set the code.

Related OBD-II codes

These nearby transmission entries can help compare wording and fault area. They may share the same verification status as the source database.