Monitor Description

The ECM illuminates the MIL as follows (2 trip detection logic is used and DTC is stored after 2 trip detection):

• The misfiring rate exceeds a threshold value and could cause emissions to deteriorate.
• During the first 1000 crankshaft revolutions after engine starts, an excessive misfire count (approximately 20 to 50 misfires per 1000 crankshaft revolutions) occurs once.
• An excessive misfire rate (approximately 20 to 60 times misfires per 1000 crankshaft revolutions) occurs 4 times.

  The ECM begins flashing the MIL as follows (2 trip detection logic is used and DTC is stored after 2 trip detection):

• Within 200 crankshaft revolutions at a high rpm, the threshold for "percent of misfires causing catalyst damage" is reached once.
• Within 200 crankshaft revolutions at a normal rpm, the threshold for "percent of misfires causing catalyst damage" is reached 3 times.