P1028 – VANOS Intake Camshaft Correlation (BMW)

Description

P1028 BMW indicates incorrect correlation between the intake camshaft and crankshaft.

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Symptoms

  • Rough idle
  • Poor acceleration
  • Hesitation

Causes

  • Timing chain stretch
  • VANOS fault
  • Sensor error

Diagnosis

  • Check cam/crank correlation
  • Inspect timing chain
  • Scan DME

Repair

  • Replace timing chain
  • Repair VANOS
  • Replace sensor