Torque Converter Clutch Solenoid Mechanical Fault
2003-2003 Mazda B2300 2.3L I4
The 2003 Mazda B2300 is equipped with a 2.3L inline-4 engine. Below you'll find detailed p1744 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
The PCM has detected a mechanical fault in the torque converter clutch solenoid. The TCC is not engaging or disengaging as commanded due to a mechanical issue with the solenoid or its hydraulic circuit.
Symptoms
- Check Engine Light
- Poor fuel economy on highway
- TCC not engaging
- Slight shudder at TCC engagement
- Transmission overheating at highway speeds
Common Causes
- TCC solenoid stuck mechanically
- Contaminated transmission fluid blocking solenoid
- Worn TCC solenoid valve
- Valve body TCC passage blocked
- Debris in transmission fluid
Diagnostic Steps
- Check transmission fluid level and condition
- Test TCC solenoid resistance
- Monitor TCC engagement with scan tool
- Check TCC solenoid for mechanical sticking
- Inspect valve body TCC passages
Repair Notes
Replace the TCC solenoid; service the transmission fluid and filter.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1744 on Other Vehicles
Common Questions
What does code P1744 mean on a 2003-2003 Mazda B2300?
P1744 stands for "Torque Converter Clutch Solenoid Mechanical Fault". The PCM has detected a mechanical fault in the torque converter clutch solenoid. The TCC is not engaging or disengaging as commanded due to a mechanical issue with the solenoid or its hydraulic circuit.
What are the symptoms of P1744 on a Mazda B2300?
Common symptoms of P1744 include: Check Engine Light, Poor fuel economy on highway, TCC not engaging, Slight shudder at TCC engagement, Transmission overheating at highway speeds.
What causes P1744 on a 2003-2003 Mazda B2300?
Common causes of P1744 include: TCC solenoid stuck mechanically, Contaminated transmission fluid blocking solenoid, Worn TCC solenoid valve, Valve body TCC passage blocked, Debris in transmission fluid.
Last updated: March 2026