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Reply To: P30x Codes and Cylinders

Nightflyr *
Richard Kirshy

the 4th cylinder in the firing order, which may not actually be cylinder #4. So if the firing order is 1-4-2-5-3-6, I would think that it’s really cylinder #5 to investigate because it’s the 4th cylinder
The misfire code directs you to the actual cylinder, not the rotational count of the firing order.
Going by your interpretation the OBD diagnostics would require several standards then according to ignition firing orders instead of physical cylinder.