P3026high severityPowertrain
CVT Torque Converter Lockup Clutch Slip
on 2017 Mazda Mazda3 2.5L I4 · FWD
What this code means
The torque converter lockup clutch in the CVT is slipping beyond acceptable limits during cruise conditions.
Symptoms
- Check Engine Light
- RPM fluctuation at highway speed
- Reduced fuel economy
- Vibration at cruise
- Transmission temperature elevated
Common causes
- Lockup clutch friction material worn
- CVT fluid degradation
- Lockup control solenoid weak
- Torque converter piston seal leak
- Excessive heat damage to clutch
Diagnostic steps
- Monitor TCC slip at steady cruise
- Check CVT fluid condition and level
- Test lockup solenoid pressure
- Measure transmission temperature
- Compare input and output shaft speeds during lockup
Repair notes
Replace torque converter. Service CVT fluid. Use only manufacturer-specified CVT fluid.
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