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2005 AUDI TT
3.2L VR6•AWD•DCT•gas•BHE
1 active safety recall on this vehicle — view recalls
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Repairs0Labor496Torque3142Fluid10DTC1029Battery1Maintenance0Recalls1
P3002high severityPowertrain

Turbo/Supercharger Boost Control Circuit High

on 2005 Audi TT 3.2L VR6 · AWD

What this code means

The signal from the turbo boost control solenoid circuit is above the expected threshold. This can cause overboost or erratic boost control.

Symptoms

  • Check Engine Light
  • Overboost condition
  • Engine knock under load
  • Reduced power mode
  • Harsh acceleration surge

Common causes

  • Open circuit in boost solenoid ground
  • Faulty solenoid stuck open
  • PCM driver circuit failure
  • Damaged wiring harness
  • Failed boost pressure sensor

Diagnostic steps

  1. Measure voltage at boost solenoid connector
  2. Check solenoid ground circuit continuity
  3. Test solenoid coil resistance
  4. Inspect wiring for opens or chafing
  5. Command solenoid with scan tool and verify operation

Repair notes

Repair open circuit or replace boost control solenoid. Verify no overboost condition exists after repair.

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