P0744moderate severityPowertrain
Torque Converter Clutch Circuit Intermittent
on 2011 Audi Q7 3.0L Supercharged V6 · AWD
What this code means
The PCM detects an intermittent fault in the torque converter clutch control circuit. This causes the converter clutch to engage and disengage erratically or fail to lock up.
Symptoms
- Shuddering during lockup
- Poor fuel economy
- Engine RPM flares at cruise
Common causes
- Faulty TCC solenoid
- Damaged wiring or loose connector
- Low or dirty transmission fluid
- Faulty transmission control module
Diagnostic steps
- Retrieve and record freeze frame data
- Check transmission fluid level and quality
- Inspect TCC solenoid wiring and connectors
- Test TCC solenoid operation and resistance
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