Error code

OBD2 P0742

OBD2P0742
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Torque Converter Clutch Circuit Stuck On.

Severity

moderateCan be driven, but performance issues will likely worsen over time.

Summary

P0742 indicates that the torque converter clutch (TCC) solenoid is stuck in the engaged position, preventing proper disengagement of the TCC. This issue affects automatic transmissions.

Symptoms

  • Transmission slipping
  • Reduced fuel efficiency
  • Increased engine RPM during steady driving

Common Causes

  • Damaged or corroded wiring and connectors
  • Defective lock up clutch pressure control solenoid
  • Dirty or contaminated transmission fluid
  • Mechanical failure of the TCC actuator

Diagnosis

  1. Inspect wiring and connectors for damage or corrosion
  2. Check transmission fluid condition and level
  3. Test the TCC pressure control solenoid

Fixes

  • Replace faulty wiring, connectors, or solenoids as needed

FAQ

What causes P0742?

Common causes include damaged wiring and connectors, a defective TCC pressure control solenoid, dirty transmission fluid, or mechanical failure of the TCC actuator.

Is it safe to drive with P0742?

It is generally drivable but performance issues may worsen over time. Addressing the issue promptly is recommended.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

More OBD2 codes

All OBD2 codes →Search more codes →