Buick 2005 LaCrosse User Manual download pdf (Page 153)

100

101

Low Coolant Warning Light

If equipped, this light

comes on brieﬂy when you

turn your ignition on as

a bulb check only.

Malfunction Indicator Lamp

Check Engine Light

Your vehicle is equipped

with a computer which

monitors operation of the

fuel, ignition, and emission

control systems.

This system is called OBD II (On-Board

Diagnostics-Second Generation) and is intended to

assure that emissions are at acceptable levels for the

life of the vehicle, helping to produce a cleaner

environment. The check engine light comes on to

indicate that there is a problem and service is required.

Malfunctions often will be indicated by the system

before any problem is apparent. This may prevent more

serious damage to your vehicle. This system is also

designed to assist your service technician in correctly

diagnosing any malfunction.

Notice: If you keep driving your vehicle with this

light on, after awhile, your emission controls

may not work as well, your fuel economy may not

be as good, and your engine may not run as

smoothly. This could lead to costly repairs that may

not be covered by your warranty.

Notice: Modiﬁcations made to the engine,

transaxle, exhaust, intake, or fuel system of your

vehicle or the replacement of the original tires with

other than those of the same Tire Performance

Criteria (TPC) can affect your vehicle’s emission

controls and may cause this light to come on.

Modiﬁcations to these systems could lead to costly

repairs not covered by your warranty. This may

also result in a failure to pass a required Emission

Inspection/Maintenance test.

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Buick 2005 LaCrosse User Manual Page 153

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