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304 MAINTAINING YOUR VEHICLE
ONBOARD DIAGNOSTIC SYSTEM — OBD II
Your vehicle is equipped with a sophisticated onboar d
diagnostic system called OBD II.This system monitors
the performance ofthe emissions,engine,and automatic
transmission contr ol systems. When these systems ar e
operating pr operly,your vehicle will pr ovide excellent
performance and fueleconomy,as wellas engine emis-
sions wellwithin curr entgovernmentr egulations.
Ifany ofthese systemsr equir e service,the OBD IIsystem
will turn on the "Malfunction Indicator Light." It will
also stor e diagnostic codes and other information to
assist your service technician in making r epairs. Al-
though your vehicle will usually be drivable and not
need towing, see your dealer for service as soon as
possible.
CAUTION!
• Prolonged driving with the "Malfunction Indica-
tor Light" on could cause further damage to the
emission controlsystem.Itcould also af fectfuel
economy and driveability. The vehicle must be
serviced before any emissions tests can be per -
formed.
• If the "Malfunction Indicator Light" is flashing
while the engine is running,severe catalytic con-
verter damage and power loss will soon occur .
Immediate service is required.
Loose FuelFiller Cap Message
After fuel is added, the vehicle diagnostic system ca
determine if the fuel filler cap is loose, impr operl
installed,ordamaged.A loose fuelfillercap message wil
be displayed in the instr ument cluster .Tighten the ga
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