P1054 – DISA Valve Position Fault (BMW)

Description

P1054 BMW indicates the DISA valve position does not match the commanded value.

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Symptoms

  • Poor acceleration
  • Hesitation
  • Rough idle

Causes

  • Position sensor fault
  • Mechanical wear
  • Actuator issue

Diagnosis

  • Check DISA position
  • Inspect mechanism
  • Scan DME

Repair

  • Replace DISA valve
  • Repair mechanism
  • Replace actuator