Torque Converter Clutch Circuit Intermittent
What does P0744 mean?
The P0744 code means the vehicle's onboard diagnostic system has detected: Torque Converter Clutch Circuit Intermittent. This is a moderate severity code.
Common Symptoms
- Check Engine Light illuminated intermittently
- Occasional shudder at highway speeds
- TCC engagement feels inconsistent
- Fuel economy varies
Probable Causes (Ranked by Likelihood)
- Loose TCC solenoid connector Very High
- Intermittent break in TCC wiring High
- TCC solenoid with intermittent internal fault Moderate
- Worn TCC friction material causing slip Low
Step-by-Step Diagnostic Procedure
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Monitor TCC status during highway driving for intermittent drops
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Wiggle the transmission connector while monitoring TCC solenoid command
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Inspect transmission connector for loose pins or corrosion
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Check TCC solenoid resistance multiple times for consistency
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Replace the solenoid or repair wiring as needed
Frequently Asked Questions
Can I drive with code P0744?
Drive short distances only. Torque Converter Clutch Circuit Intermittent can cause severe transmission damage if ignored.
What is the most common fix for P0744?
The most common fix is replacing the affected solenoid. In some cases, a transmission fluid flush and solenoid replacement resolves the issue. Internal torque converter or valve body damage requires more extensive repair.
Can I replace the solenoid myself?
On some vehicles, shift solenoids are accessible by removing the transmission pan. On others, the valve body must be removed. This is a moderate to hard DIY job requiring transmission fluid drainage and careful reassembly.