P3063high severityPowertrain
Torque Converter Clutch Capacity Low
on 2002 BMW 525i 2.5L I6 M54 · RWD
What this code means
The torque converter clutch is not transmitting the expected amount of torque. Slip is detected beyond the normal engagement tolerance.
Symptoms
- Check Engine Light
- TCC shudder at highway speed
- Slight RPM fluctuation at cruise
- Reduced fuel economy at highway
- Torque converter area overheating
- Vibration at steady throttle
Common causes
- Worn torque converter clutch lining
- Degraded transmission fluid
- TCC apply solenoid weak
- Internal seal leak
- TCC damper spring failure
Diagnostic steps
- Monitor TCC slip PID at steady cruise
- Check transmission fluid condition
- Test TCC apply pressure
- Inspect TCC solenoid operation
- Perform stall speed test
Repair notes
Replace torque converter. Flush transmission fluid. Some vehicles respond to fluid replacement alone.
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29CC
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Misfire Cylinder 6
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