P1744moderate severityPowertrain
Torque Converter Clutch Solenoid Mechanical Fault
on 2008 Mazda MX-5 Miata 2.0L I4 · RWD
What this code means
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.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1