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2024 BMW 3 SERIES G20
2.0L I4 Turbo B48•RWD•AUTOMATIC•gas•B48B20•turbo
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Repairs0Labor496Torque5223Fluid8DTC1489Battery1Maintenance0Recalls0
29D1high severityPowertrain

Misfire Cylinder 6

on 2024 BMW 3 Series G20 2.0L I4 Turbo B48 · RWD

What this code means

The engine control module detected a misfire on cylinder 6, indicating a combustion fault. This is the BMW equivalent of OBD code P0306.

Symptoms

  • Rough idle
  • Loss of power
  • Check engine light flashing

Common causes

  • Faulty ignition coil
  • Worn spark plug
  • Fuel injector fault
  • Low compression or vacuum leak

Diagnostic steps

  1. Read freeze frame and confirm cylinder 6 misfire
  2. Swap coil and plug to another cylinder
  3. Test injector operation on cylinder 6
  4. Perform compression test on cylinder 6
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