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2015 AUDI A8
3.0L Supercharged V6•AWD•AUTOMATIC•gas•CTGE•supercharged
5 active safety recalls on this vehicle — view recalls
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Repairs0Labor491Torque4263Fluid10DTC1133Battery1Maintenance0Recalls5
P3020critical severityPowertrain

CVT Belt/Chain Slip Detected

on 2015 Audi A8 3.0L Supercharged V6 · AWD

What this code means

The TCM detected excessive slip in the CVT belt or chain. The input and output shaft speed ratio does not match the commanded pulley ratio.

Symptoms

  • Check Engine Light
  • Transmission shudder
  • RPM flare without acceleration
  • Whining noise from transmission
  • Reduced acceleration
  • Limp mode activation

Common causes

  • Worn CVT belt/chain
  • Low CVT fluid level
  • Degraded CVT fluid
  • Worn pulleys
  • CVT pressure solenoid failure

Diagnostic steps

  1. Check CVT fluid level and condition
  2. Monitor input vs output shaft speed
  3. Check line pressure with scan tool
  4. Inspect CVT fluid for metal contamination
  5. Test pressure control solenoids

Repair notes

CVT fluid replacement with OEM-specified fluid may resolve mild cases. Severe slip requires belt/chain and possibly pulley replacement.

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