2000 Buick LeSabre: Check tire pressure warning is flashing, but tire pressure is OK

My Lesabre has buttons on the left side of the dash. The one called Gage Info has a number of things like oil pressure check tire pressure heat Battery. Push this button till it says check tire pressure To reset your light push the reset button and hold for fifteen or twenty second and the light on the dash should go out and it will show tire pressure ok on the gage. Before you reset check all four tires for air as one tire could be down 8 or 10 lbs and the light will come back on. they all have to be the same pressure.
When you change your oil you should reset the oil section as well and hold reset the same as above. The oil section tells you how much oil you use over an amount of time.

After checking air pressure and adding air if needed, hold the RESET button in 10-20 seconds and it should clear the Check Tire Pressure light.

SWITCH IGNITION ON, REPEATEDLY PRESS GAGE INFO BUTTON UNTIL THE MESSAGE TIRE PRESSURE IS DISPLAYED IN THE MULTIFUNCTION DISPLAY, PRESS AND HOLD RESET BUTTON UNTIL THE MESSAGE TIRE PRESSURE RESET IS IN THE DISPLAYED IN THE MULTIFUNCTION DISPLAY,RELEASE THE RESET BUTTON THE MESSAGE TIRE PRESSURE NORMAL WILL BE DISPLAYED IN THE MULTIFUNCTION DISPLAY, AFTER RESETTING TPMS THE VECHICLE REQUIRE UP TO 30 MINUTES OF STRAIGHT LINE SMOOTH ROAD DRIVING IN EACH OF THE 3 SPEED RANGES 15 - 40 MPH - 40 - 70 MPH - 70 - 90 MPH. MAKE SURE ALL 4 TIRES HAS THE RIGHT AIR PRESSURE BEFORE RESETTING TIRE PRESSURE LIGHT.OR LIGHT WILL NOT TURN OFF IF ONE TIRE IS LOW.

One of the sensors in the tires is faulty, or the battery in the sensor is bad. Tire shop can take car of that for ya.

Put whatever air pressure you use, in all your tires,
don't forget to check the pressure in the
spare.

If light stays on ,go to a tire store,
as a wheel valve stem assy, may have failed

TPMS (tire pressure monitor system)

take car to a tire shop.They have a tool to check the sensors in the wheels,which sounds like the problem good luck

the correct tire pressure is not necessarily vehicle specific. If you look on the sidewall of the tire there will be the pressure specification for that specific tire.

Because of changing outside temps this happens, just hold reset button on left side of dash until it reads tire pressure 100% again, just make sure your pressure is right before you do it. this is the same for oil changes and the like.

go to the passangers front on the side of the dash is a fuse panel it has a red button that says reset turn the key to the run position and hold the reset button in untill the light goes out it may also beep at you while doing this.

Turn ignition to run position,go to fuse panel right hand of vehicle,push and hold reset button for 5 seconds,low pressure light will flash 3 times,start car it should turn off the low pressure light.