P2769moderate severityPowertrain
Torque Converter Clutch Duty Cycle Not Understood
on 2001 Lexus LS 430 4.3L V8 · RWD
What this code means
The TCM cannot determine the correct duty cycle for TCC operation.
Symptoms
- Check engine light
- TCC shudder
- Abnormal converter operation
Common causes
- TCM calibration issue
- Input sensor fault
- Solenoid performance issue
Diagnostic steps
- Check input speed sensor
- Update TCM calibration if TSB exists
- Monitor TCC data
Repair notes
Update TCM software. Replace solenoid if mechanical fault.
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