Tire Pressure Monitor System; Don’t let anyone tell you that underinflation; or overinflation is all right. It’s not. If your tires- Page 258

2003 Buick Century Owner Manual

Model Year
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Notice: Don’t let anyone tell you that underinflation
or overinflation is all right. It’s not. If your tires
don’t have enough air (underinflation), you can get
the following:

Too much flexing

Too much heat

Tire overloading

Bad wear

Bad handling

Bad fuel economy

If your tires have too much air (overinflation), you
can get the following:

Unusual wear

Bad handling

Rough ride

Needless damage from road hazards

When to Check

Check your tires once a month or more.

Don’t forget your compact spare tire. It should be at
60 psi (420 kPa).

How to Check

Use a good quality pocket-type gage to check tire
pressure. You can’t tell if your tires are properly inflated
simply by looking at them. Radial tires may look
properly inflated even when they’re underinflated.

Be sure to put the valve caps back on the valve stems.
They help prevent leaks by keeping out dirt and
moisture.

Tire Pressure Monitor System

If your vehicle has the tire inflation monitor system, it
can alert you to a large change in the pressure of
one tire. The system “learns” the pressure at each tire
throughout the operating speed range of your vehicle.
The system normally takes between 45 and 90 minutes
of driving to learn the tire pressures. This time may
be longer depending on your individual driving habits.
Learning need not be accumulated during a single
trip. Once learned, the system will remember the tire
pressures until the system is recalibrated.

After the system has learned tire pressures with properly
inflated tires, the LOW TIRE light will come on if the
pressure in one tire becomes 12 psi (83 kPa) lower than
the other three tires. The tire inflation monitor system
won’t alert you if the pressure in more than one tire is low,
if the system is not properly calibrated, or if the vehicle is
moving faster than 70 mph (110 km/h).

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  • Too much flexing • Too much heat • Tire overloading • Bad wear • Bad handling • Bad fuel economy If your tires have too much air (overinflation), you can get the following: • Unusual wear • Bad handling • Rough ride • Needless damage from road hazards When to Check Check your tires once a month or more.

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