P0741high severityPowertrain
Torque Converter Clutch Circuit Performance/Stuck Off
on 1999 Chevrolet Astro 4.3L V6 Vortec · RWD
What this code means
The TCC is not engaging when commanded. The engine RPM is not dropping as expected when lockup is commanded.
Symptoms
- Check Engine Light
- Higher than normal highway RPM
- Poor fuel economy
- Transmission overheating
Common causes
- TCC solenoid failure
- Worn TCC friction material
- Low line pressure
- Valve body issue
- Internal converter failure
Diagnostic steps
- Command TCC with scan tool and monitor RPM drop
- Test TCC solenoid
- Check line pressure
- Check transmission fluid condition
Repair notes
TCC solenoid replacement. If internal converter damage, torque converter replacement.
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