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Do not make any unauthorized changes to your
vehicle or engine. By law, vehicle owners and anyone
who manufactures, repairs, items, sells, leases,
trades vehicles, or supervises a fleet of vehicles are
not permitted to intentionally remove an emission
control device or prevent it from working.
Information about your vehicle’s emission system is
on the Vehicle Emission Control Information Decal
located on or near the engine. This decal identifies
engine displacement and gives some tune up
specifications.
Please consult your “Warranty Guide” for complete
emission warranty information.
Readiness for inspection/maintenance (I/M)
testing
In some localities, it may be a legal requirement to
pass an I/M test of the on-board diagnostic (OBD-II)
system. If your “Check Engine/Service Engine Soon”
light is on, refer to the description in the Warning
Lights and Chimes section of the Instrumentation
chapter. Your vehicle may not pass the I/M test with
the “Check Engine/Service Engine Soon” light on.
If the vehicle’s powertrain system or its battery has
just been serviced, the OBD-II system is reset to a
“not ready for I/M test” condition. To ready the
OBD-II system for I/M testing, a minimum of 30
minutes of city and highway driving is necessary as
described below:
• First, at least 10 minutes of driving on an
expressway or highway.
• Next, at least 20 minutes driving in stop-and-go,
city-type traffic with at least four idle periods.
Allow the vehicle to sit for at least eight hours
without starting the engine. Then, start the engine
and complete the above driving cycle. The engine
must warm up to its normal operating temperature.
Once started, do not turn off the engine until the
above driving cycle is complete.
Maintenance and care
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