Air pressure light on in dash, checked tire pressure and light still on. Pushed the reset on the odometer, the words on odometer went off. The icon for the tire pressure is still on. Also, just wondering what exactly is the sensor and where is it located, the idea of this blows my mind as I understand that is like a wireless signal of sorts.
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Re: air pressure sensor
It sounds ike one of your wheel sensors is faulty. These are part of the valve on the wheel rim where you add air to inflate. The only way to replace this is to remove the tyre. Your best bet is to take it back to your local main dealer as they are fully equipped to deal with such issues.
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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.
Unplug battery for couple hours to let computer reset while battery is unplugged turn key on to drain all power in system after few hours you should be good. Also make sure all tires got same amount of pressure.
the odometer button has nothing to do with the tires. After you set the tires to the correct pressure, it should go off by itself., sometimes it takes a while, few miles. Be sure to check the spare. some trucks have a sensor there, you will be able to look at it and tell if it has a sensor by the construction of the valve stem. If all tires are good, and the light does not go off, the dealer will need to check it out. You say you put air in, but not what pressure. The pressure spec is on the drivers door jamb. I would go 2 psi more than the sticker.
With and without "Mesage Center" respectively (pretty sure)
With the engine on...
Push "Setup" button, until your driver display says something like "Press Reset for system check".
Then push Reset. The system check will start, rotating through a series of checks.
About the fifth or sixth check will be the tire pressure. The system will sound the tone (same one that starts w/the light) and It'll say something like "Check Tires Pressure" on that moment press and hold for 3 or 4 seconds Reset. When you release the Reset button It'll show "Hold Reset if tires are OK". While that's up, hold the Reset button. After 3 or 4 seconds, the tire warning light will blink 2 or 3 times and then will stop .You need to be ready for it, because you don't get very long to release.
How to reset the low tire pressure warning if the vehicle does not have the "Message Center"
Turn the ignition to the ON position, depress and Trip/odometer button (located in the instrument cluster) until "TIRE RESET" or "CHECK TIRE AND RESET" is displayed in the odometer display window. Once "TIRE RESET" or "CHECK TIRE AND RESET" is displayed, press and hold the button for three seconds. The low tire warning indicator light will flash three times as the low tire warning system begins to initialize.
After you have changed a tire and adjusted your tire pressures you will need to initial the tire pressure monitoring. If your vehicle does not have I-drive then with the iginition in the on position on the left steering wheel stalk, move the rocker switch up and cycle through until you see an icon in the cluster that says initailize. push the button on the end of the stalk inwards toward the steering wheel and hold until you see the icon in the cluster show a check mark. When it shows a check mark your finished.