P3026high severityPowertrain
CVT Torque Converter Lockup Clutch Slip
on 2021 Polestar 2 Long Range Dual Motor AWD · AWD
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.
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