P1052 – DISA Valve Stuck (BMW)

Description

P1052 BMW indicates the DISA valve is stuck and not adjusting intake runner length.

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Symptoms

  • Poor acceleration
  • Hesitation
  • Rattling noise

Causes

  • Mechanical failure
  • Flap wear
  • Actuator fault

Diagnosis

  • Inspect DISA movement
  • Check flap
  • Scan DME

Repair

  • Replace DISA valve
  • Repair mechanism
  • Replace actuator