P0744 is triggered when monitoring logic identifies an issue with Torque Converter Clutch Circuit Intermittent affecting transmission and shift management.
P0744 Code: Meaning, Symptoms, Causes & Fix
Overview
Symptoms
- transmission warning message
- gear hunting
- reduced acceleration
Common causes
- Temperature/vibration related circuit dropout affecting torque converter clutch circuit intermittent
- Intermittent harness contact
- Connector pin damage/corrosion or harness stress near related components
How to diagnose P0744
- Confirm P0744 and capture freeze-frame data with a professional scan tool.
- Inspect wiring, connectors, and grounds related to torque converter clutch circuit intermittent for obvious defects.
- Reproduce the fault with harness movement and heat/vibration checks.
- Check for related DTCs to identify the root-cause chain before replacing parts.
- After repair, clear codes and confirm readiness monitors complete without recurrence.
Severity of code P0744
Moderate: This code is moderate severity: the vehicle may still operate, but fault progression can increase repair cost over time.
Can you drive with P0744?
Most vehicles can be driven short-term with P0744, but postpone heavy load/highway driving until repaired.
If the warning lamp is flashing or drivability/safety is affected, avoid driving and diagnose immediately.
How to fix it (step-by-step)
- Repair obvious wiring/connector faults first to prevent repeat parts replacement.
- Address the root fault mode (intermittent) in the torque converter clutch circuit intermittent circuit/system.
- Apply the required relearn/adaptation procedure if specified by service information.
- Road-test and verify P0744 remains cleared under the conditions that originally set the code.
Fix options
- Repair intermittent connector contact.
- Retest after thermal/vibration simulation.
- Clear DTCs and verify with live data and completed drive cycle.
Typical repair cost
$300-$1500
Common mistakes when diagnosing P0744
- Replacing parts without verifying voltage, ground, and signal integrity first.
- Ignoring related stored/pending codes that indicate upstream faults.
- Skipping post-repair verification drive cycle and readiness checks.
P0744 in common vehicles
P0744 appears across makes such as Ford, Toyota, Honda, Chevrolet. Failure patterns differ by platform: wiring routes, software calibration, and component supplier revisions can change root cause.
Frequently asked questions
What causes P0744?
P0744 is commonly set by intermittent faults affecting torque converter clutch circuit intermittent.
How much does it cost to fix P0744?
For P0744, repair costs are typically $300-$1500 depending on exact root cause, labor rates, and part quality.
Can I clear P0744 without repair?
You can clear P0744 temporarily, but the code usually returns until the underlying fault is corrected.