P1201 – Boost Pressure Too High (BMW)

Description

P1201 BMW indicates the boost pressure is higher than the ECU target.

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Symptoms

  • Hesitation
  • Limp mode
  • Whistling noise

Causes

  • Wastegate stuck closed
  • Boost control fault
  • Vacuum issue

Diagnosis

  • Check wastegate
  • Inspect vacuum lines
  • Scan DME

Repair

  • Repair wastegate
  • Fix vacuum leaks
  • Replace boost solenoid