Torque Converter Clutch Adaptive Learning Limit Exceeded
2002-2009 GMC Envoy 4.2L I6
Description
The TCC adaptive learning values have reached their maximum limit, indicating the torque converter clutch can no longer maintain proper engagement within the programmable range.
Symptoms
- Check Engine Light
- TCC shudder worsening over time
- Gradually increasing fuel consumption
- Slip at highway cruise
- TCC may stop engaging
- Occasional limp mode
Common Causes
- Severe torque converter clutch wear
- Fluid deterioration beyond service limit
- Piston seal leak in converter
- TCC solenoid degradation
- Extended fluid service intervals
Diagnostic Steps
- Read TCC adaptation values
- Monitor TCC slip percentage
- Check transmission fluid age and condition
- Test TCC apply pressure
- Review service history for fluid changes
Repair Notes
Torque converter replacement required when adaptation limit is reached. This indicates wear beyond what software can compensate for.
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
P3064 on Other Vehicles
Common Questions
What does code P3064 mean on a 2002-2009 GMC Envoy?
P3064 stands for "Torque Converter Clutch Adaptive Learning Limit Exceeded". The TCC adaptive learning values have reached their maximum limit, indicating the torque converter clutch can no longer maintain proper engagement within the programmable range.
What are the symptoms of P3064 on a GMC Envoy?
Common symptoms of P3064 include: Check Engine Light, TCC shudder worsening over time, Gradually increasing fuel consumption, Slip at highway cruise, TCC may stop engaging, Occasional limp mode.
What causes P3064 on a 2002-2009 GMC Envoy?
Common causes of P3064 include: Severe torque converter clutch wear, Fluid deterioration beyond service limit, Piston seal leak in converter, TCC solenoid degradation, Extended fluid service intervals.