17964/P1556/005462

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17964/P1556 - Charge Pressure Control: Negative Deviation

Possible Symptoms

  • Reduced power output
  • Limp mode

Possible Causes

  • Boost Pressure too Low
  • Hoses/Pipes incorrect connected, disconnected or leaking
  • Charger Pressure Control defective
    • VNT (variable nozzle turbo): nozzles stuck
  • Solenoid Valve for Boost Pressure Control (N75) defective

Possible Solutions

  • Check Hoses/Pipes to/between Components
  • Check Solenoid Valve for Boost Pressure Control (N75)
  • Check / Clean / Replace Charge Pressure Control
    • Check / Clean mechanism for variable nozzles



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