P0742
Torque Converter Clutch Circuit Stuck On
2002-2009 GMC Envoy 4.2L I6 🇬🇧
High SeverityPowertrain
Description
The TCC is not releasing when it should, causing the engine to stall or shudder at low speeds.
Symptoms
- Stalling when coming to a stop
- Shudder at low speed
- Vehicle lunging at stops
- Check Engine Light
Common Causes
- TCC solenoid stuck on
- Valve body issue
- Wiring short keeping solenoid energized
Diagnostic Steps
- Monitor TCC engagement state
- Test solenoid
- Check valve body
- Check wiring for shorts
Repair Notes
Replace TCC solenoid. Driving with TCC stuck on causes stalling.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
P0742 on Other Vehicles
Common Questions
What does code P0742 mean on a 2002-2009 GMC Envoy?
P0742 stands for "Torque Converter Clutch Circuit Stuck On". The TCC is not releasing when it should, causing the engine to stall or shudder at low speeds.
What are the symptoms of P0742 on a GMC Envoy?
Common symptoms of P0742 include: Stalling when coming to a stop, Shudder at low speed, Vehicle lunging at stops, Check Engine Light.
What causes P0742 on a 2002-2009 GMC Envoy?
Common causes of P0742 include: TCC solenoid stuck on, Valve body issue, Wiring short keeping solenoid energized.