P0350 OBD II Trouble Code Ignition Coil Primary/Secondary Circuit Malfunction

Symptoms of P0350 OBD II Trouble Code

  • Drivability issues, including one or more ignition misfires
  • Poor engine performance
  • Diminished fuel efficiency
  • Cylinder misfire codes will likely accompany a code P0350 (e.g. P0301, P0302, P0303, P0304, etc.)

Common Causes of P0350 OBD II Trouble Code

  • Open or shorted primary/secondary circuits
  • Defective ignition coils or coil pack/s
  • Bad ignition system relay
  • Blown fuses or fusible links
  • Faulty PCM or a PCM programming error

Severity of P0350 OBD II Trouble Code

Ignition misfire issues will likely accompany a code P0350; therefore it should be categorized as severe.