P0744
Torque Converter Clutch Circuit Intermittent
Moderatetransmission
Overview
The P0744 diagnostic trouble code signals a torque converter clutch circuit intermittent condition detected by the transmission control module. This code relates to the automatic transmission system and may affect shift quality, timing, or overall transmission performance. Prompt attention is important to prevent further transmission damage.
Symptoms
- Vehicle stuck in one gear (limp mode)
- Loss of one or more gears
- Transmission slipping between gears
- Unusual whining or grinding noise from transmission
Common Causes
- Failed torque converter
- Worn or damaged internal transmission components
- Faulty input or output speed sensor
- Low or contaminated transmission fluid
Diagnosis Steps
- 1Connect an OBD-II scanner and read all stored trouble codes and freeze frame data
- 2Check transmission fluid level and condition; top off or replace if needed
- 3Test the transmission speed sensors with a multimeter or scan tool
- 4Inspect wiring and connectors for the transmission harness
- 5Perform a transmission pressure test if accessible
Estimated Repair Cost
$300 — $2,500
Cost varies by vehicle, location, and repair shop. Includes parts and labor.
Commonly Affected Vehicles
Honda AccordToyota CamryRam 1500Ford Explorer
Related Codes
More Transmission Codes
P0218Transmission Over Temperature Condition
CriticalP0700Transmission Control System (MIL Request)
SevereP0701Transmission Control System Range/Performance
SevereP0702Transmission Control System Electrical
SevereP0703Torque Converter/Brake Switch "B" Circuit
ModerateP0704Clutch Switch Input Circuit Malfunction
ModerateFrequently Asked Questions
Driving with a transmission code is risky. Continued driving can cause further damage to the transmission, resulting in significantly higher repair costs. Have it inspected as soon as possible.