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2020 MAZDA MAZDA3
2.5L Skyactiv-G I4 (186 hp)•AWD•AUTOMATIC•gas
2 active safety recalls on this vehicle — view recalls
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Repairs0Labor987Torque6478Fluid16DTC2264Battery2Maintenance0Recalls2
P1744moderate severityPowertrain

Torque Converter Clutch Solenoid Mechanical Fault

on 2020 Mazda Mazda3 2.5L Skyactiv-G I4 (186 hp) · AWD

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

  1. Check transmission fluid level and condition
  2. Test TCC solenoid resistance
  3. Monitor TCC engagement with scan tool
  4. Check TCC solenoid for mechanical sticking
  5. Inspect valve body TCC passages

Repair notes

Replace the TCC solenoid; service the transmission fluid and filter.

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