P0742high severityPowertrain
Torque Converter Clutch Circuit Stuck On
on 2001 Lexus LS 430 4.3L V8 · RWD
What this code means
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.
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