P1229 – Cylinder Torque Deviation (BMW)

Description

P1229 BMW indicates uneven torque contribution between cylinders.

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Symptoms

  • Rough idle
  • Vibration
  • Reduced power

Causes

  • Injector imbalance
  • Ignition variation
  • Compression difference

Diagnosis

  • Check cylinder balance
  • Inspect ignition
  • Perform compression test

Repair

  • Service injectors
  • Repair ignition
  • Fix mechanical issues