Misfire Code Helper

Translate misfire codes into cylinder targets and layout clues.

Decode Your Misfire Code

Codes P0301-P0312 identify a specific cylinder. P0300 is random misfire.

Quick Notes

  • Cylinder 1: Usually closest to the front of the engine (belt side).
  • Bank 1: The side of the engine that contains cylinder 1.
  • Verify numbering: Always confirm with a service manual or under-hood label.