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EMISSIONS INSPECTION AND MAINTENANCE
In some localities, it may be a legal requirement to pass
an inspection of your vehicle’s emissions control system.
Failure to pass could prevent vehicle registration.
For states which have an I/M (Inspection and
Maintenance) requirement, this check verifies
the following: the CHECK ENGINE Light is functioning
and is not on when the engine is running, and that the
OBD (Onboard Diagnostic) system is ready for testing.
Normally, the OBD system will be ready. The OBD
system may not be ready if your vehicle was recently
serviced, if you recently had a dead battery, or a battery
replacement. If the OBD system should be determined
not ready for the I/M test, your vehicle may fail the test.
Your vehicle has a simple ignition key actuated test
which you can use prior to going to the test station. To
check if your vehicle’s OBD system is ready, you must do
1. Insert your ignition key into the ignition switch.
2. Turn the ignition to the ON/RUN position, but do not
crank or start the engine.
3. If you crank or start the engine, you will have to start
this test over.
4. As soon as you turn your key to the ON/RUN
position, you will see your CHECK ENGINE light come
on as part of a normal bulb check.
5. Approximately 15 seconds later, one of two things will
a. The CHECK ENGINE light will flash for about 10
seconds and then return to being fully illuminated
until you turn off the ignition key or start the
engine. This means that your vehicle’s OBD system
is not ready and you should not proceed to the I/M
b. The CHECK ENGINE light will not flash at all
and will remain fully illuminated until you turn off
the ignition key or start the engine. This means that
your vehicle’s OBD system is ready and you can
proceed to the I/M station.
MAINTAINING YOUR VEHICLE 207