Misfire History #1-4

Indicates number of misfires that have occurred after 195 current misfires have been counted. The current misfire counter will add its misfires to history misfire counter after 195 total misfires have taken place. If 1 cylinder is misfiring, misfiring current counter will have 195 misfires counted before adding to its history counter. If 2 cylinders are misfiring, misfiring current counter will add to their history counters after 97 misfires. The counter increments only after a misfire diagnostic trouble code (DTC) has been set.