P1744 - Torque Converter Clutch Solenoid Performance
The P1744 code indicates that the powertrain control module (PCM) has detected a malfunction in the torque converter clutch (TCC) solenoid circuit or that the TCC is not engaging or disengaging properly. This can cause the torque converter to slip, leading to reduced fuel economy, transmission overheating, and potential internal damage. The code is commonly triggered by low transmission fluid, a faulty TCC solenoid, or wiring issues.
1. Symptoms You Will Notice
- Check Engine Light illuminated
- Transmission slipping or shuddering at highway speeds
- Poor fuel economy
- Transmission overheating
2. Most Common Causes
- Low or contaminated transmission fluid
- Faulty torque converter clutch solenoid
- Wiring or connector issues in the TCC circuit
- Internal transmission mechanical failure
3. Step-by-Step Diagnosis
Step 1: Check transmission fluid level and condition; top off or replace if necessary.
Step 2: Use a scan tool to monitor TCC solenoid duty cycle and verify electrical signals.
Step 3: Inspect wiring and connectors for damage, corrosion, or loose connections.
Step 4: Test the TCC solenoid resistance and operation per manufacturer specifications.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause transmission overheating and internal damage. Short trips to a repair shop are acceptable if the transmission is not slipping severely.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, depending on whether the issue is a simple solenoid replacement or requires more extensive transmission work.
5. Commonly Affected Makes
This is a manufacturer-specific code. The exact manufacturer is not confirmed in our current database.