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Loose Fuel Filler Cap Message
If the vehicle diagnostic system determines that the fuel filler
cap is loose, improperly installed, or damaged, a “Check fuel
cap” message will be displayed in the instrument cluster
display. Refer to “Instrument Cluster Display” in ”Under-
standing Your Instrument Panel” for further information.
Tighten the gas cap until a ⬙clicking⬙ sound is heard. This is
an indication that the gas cap is properly tightened.
Push the odometer reset button to turn the message off. If the
problem persists, the message will appear the next time the
vehicle is started. This might indicate a damaged cap. If the
problem is detected twice in a row, the system will turn on
the MIL. Resolving the problem will turn the MIL light off.
EMISSIONS INSPECTION AND MAINTENANCE
PROGRAMS
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 that require an Inspection and Mainte-
nance (I/M), this check verifies the “Malfunction
Indicator Light (MIL)” is functioning and is not on
when the engine is running, and that the OBD II system is
ready for testing.
Normally, the OBD II system will be ready. The OBD II
system may not be ready if your vehicle was recently
serviced, or recently had a dead battery or a battery
replacement. If the OBD II system should be determined
not ready for the I/M test, your vehicle may fail the test.
Your vehicle has a simple ignition actuated test, which you
can use prior to going to the test station. To check if your
vehicle’s OBD II system is ready, you must do the follow-
ing:
1. Cycle the ignition to the ON mode, but do not crank or
start the engine.
NOTE: If you crank or start the engine, you will have to
start this test over.
2. As soon as you cycle the ignition to the ON mode, you
will see the “Malfunction Indicator Light (MIL)” symbol
come on as part of a normal bulb check.
3. Approximately 15 seconds later, one of two things will
happen:
• The MIL will flash for about 10 seconds and then return
to being fully illuminated until you cycle the ignition
OFF or start the engine. This means that your vehicle’s
OBD II system is not ready and you should not proceed
to the I/M station.
7
MAINTAINING YOUR VEHICLE 289
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