P1202 – Boost Deviation Positive (BMW)

Description

P1202 BMW indicates the measured boost is higher than requested.

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Symptoms

  • Hesitation
  • Reduced power
  • Limp mode

Causes

  • Wastegate malfunction
  • Boost solenoid fault
  • ECU control issue

Diagnosis

  • Check boost deviation
  • Inspect wastegate
  • Test solenoid

Repair

  • Repair wastegate
  • Replace solenoid
  • Update ECU