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If the TPMS light illuminates in your 2009 Porsche Cayenne, start by checking each tire and inflating them as needed. Consult the decal located in the driver's door to determine the correct air pressure for your tires. Once all tires are properly inflated and undamaged, you can reset the system. Turn on the vehicle, then press and hold the reset button located to the right of the steering wheel. Next, drive for 5 to 10 minutes to enable the computer to adjust to the new tire pressures for your SUV.
To reset the tire pressure monitoring system on the 2009 Porsche Cayenne, you need to first press the menu button and navigate to the tire pressure section. From there, select settings and look for the option to reset the system.