Use and Care Manual

Figure 5.33
“OK” -- Indicates that a particular monitor being
checked has completed its diagnostic testing.
“INC” -- Indicates that a particular monitor being
checked has not completed its diagnostic testing.
“N/A” -- The monitor is not supported on the vehicle.
The GREEN, YELLOW and RED LEDs provide a quick way to
help you determine if a vehicle is ready for an Emissions Test.
The LED and audio tone indications are interpreted as below:
LED Interpretation:
a. GREEN LED – Indicates that engine systems are “OK”
and operating normally (the number of Monitors
supported by the vehicle which have run and performed
their self-diagnostic testing is in the allowed limit. MIL
is off). There are no stored and pending DTCs that will
cause a problem during an Emissions Test at this time.
b. YELLOW LED – With MIL off, there are some conditions
that may cause the YELLOW LED to light:
• If a “Stored” or "Pending" DTC is causing the YELLOW
LED to light, the vehicle might pass an Emissions Test.
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