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2013 BMW M3 E90

4.0L V8 S65RWDDCTgas
Repairs0Labor499Torque3925Fluid7DTC909Battery0Maintenance0Recalls0
P1346high severityPowertrain

Misfire Cylinder 2 With Fuel Cut-Off

on 2013 BMW M3 E90 4.0L V8 S65 · RWD

What this code means

The DME detected a severe misfire on Cylinder 2 that triggered fuel injector shut-off. The catalytic converter protection system has deactivated the fuel injector for Cylinder 2 to prevent catalyst overheating.

Symptoms

  • Check Engine Light flashing
  • Rough running
  • Loss of power
  • Engine vibration

Common causes

  • Faulty ignition coil Cylinder 2
  • Worn spark plug Cylinder 2
  • Faulty fuel injector Cylinder 2
  • Low compression Cylinder 2
  • Intake valve carbon buildup

Diagnostic steps

  1. Check misfire counters per cylinder
  2. Swap ignition coil from Cylinder 2 to another
  3. Inspect and replace spark plug Cylinder 2
  4. Test fuel injector operation
  5. Compression test Cylinder 2

Repair notes

Replace faulty ignition coil or spark plug on Cylinder 2.

Other Powertrain codes on this vehicle

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