Hold the reset button down (on the left bank of buttons - same one used to reset trip odometers) when tire pressure screen is being shown.
Check your owners manual.
If no light illuminated first step check fuel pressure
Check out Crutchfield.com
Check in the air filter housing.
Electrical problem, check batt cable connections to start
check crank sensor
Select the tire pressure info by pressing the "gage info" button, then press and hold the reset button until the display shows that the tire pressures have been reset.
on the driver side door, it says the correct tire pressure for all 4 tires is 30 psi. and 60 psi for the spare. If your car is telling you to check the tire pressure, it may be something else. Let me know if this helps.
Check firing order
After repairing the cause of the code, you can clear it with a scan tool.
Check the fuse under the back seat it may be as simple as that.
The low pressure AC port on a 2000 Buick Century is located on the accumulator. It is used to fill the system with refrigerant and to check pressure levels.