P0300: Cold-Start Misfire or Rough Idle

Published: Jan. 13, 2020, 2:04 p.m.

b'The complete symptom is a cold-start misfire or a rough idle concern. Upon inspection, the technician will find medium to high misfire counts and the symptom always occurs on one or two cylinders and goes away when the engine warms up. Now, a misfire or rough idle isn\\u2019t that uncommon in the grand scheme of things, but in this case it\\u2019s what\\u2019s causing them that\\u2019s unusual.'