2011-2012 Cayenne – Manual

2011-2012 Cayenne – Manual

Page: 119

Tire Pressure Monitoring (TPM)

Each tire, including the spare, should be checked monthly when cold and inflated to the inflation pressure recommended by Porsche on the tire inflation pressure label.

For information on the tire inflation pressure label:

  • Please see the chapter "TIRES AND WHEELS" on page 265.

As an added safety feature, your vehicle has been equipped with a tire pressure monitoring system (TPM) that illuminates a low tire pressure telltale (warning light) when one or more of your tires is significantly under-inflated.

Accordingly, when the low tire pressure telltale illuminates, you should stop and check your tires as soon as possible, and inflate them to the proper pressure. Driving on a significantly under-inflated tire causes the tire to overheat and can lead to tire failure. Under-inflation also reduces fuel efficiency and tire tread life, and may affect the vehicle's handling and stopping ability.

The display as well as the settings for the Tire Pressure Monitoring take place on the on-board computer.

However, the tire pressure must still be set manually on the wheel.

  • Please see the chapter "TIRE PRESSURE FOR COLD TIRES 68 °F (20 °C)" on page 310.

Maintaining Tire Pressure

Driving the vehicle with low tire pressure increases the risk of a tire failure and resulting loss of control. Furthermore, low tire pressure increases rate of wear of the affected tires.

Please note that the Tire Pressure Monitoring is not a substitute for proper tire maintenance, and it is the driver's responsibility to maintain correct tire pressure, even if under-inflation has not reached the level to trigger illumination of Tire Pressure Monitoring low tire pressure telltale. Low tire pressure reduces the road safety of the vehicle and destroys the tire and wheel.

Tire Pressure Monitoring gives a warning about tire damage caused by a natural loss in pressure as well as about a gradual loss of pressure caused by foreign objects.

Tire Pressure Monitoring cannot warn you about tire damage that occurs suddenly (e.g. flat tire due to abrupt external effects).

  • When a red tire pressure warning appears, stop immediately in a suitable place and check the tires for damage. If necessary, remedy the damage with a tire sealant.
  • Do not by any means continue to drive with defective tires.
  • Sealing the tire with tire sealant is only an emergency repair so you can drive to the nearest specialist workshop.
    The maximum permitted speed is 50 mph (80 km/h).
  • Do not drive with tires in which the tire pressure drops again very quickly. In case of doubt, have tires checked by a specialist workshop.
  • Defective tires must be replaced immediately at an authorized Porsche dealer.
    Tires must never be repaired under any circumstances.
  • If Tire Pressure Monitoring is defective (e.g. defective wheel transmitter), contact an authorized Porsche dealer immediately and have the damage repaired.
    The tire pressure will not be monitored at all or will be monitored only partially when Tire Pressure Monitoring is defective.

For information on warning messages on the multipurpose display:

  • Please see the chapter "OVERVIEW OF WARNING MESSAGES" on page 139.
  • Incomplete entries or selection of the wrong tires on the multi-purpose display affect the accuracy of warnings and messages.
    The settings in the tire pressure menu must be updated following a wheel change or changes in vehicle loading.
  • Use only the pressure differences shown in the "Fill info" display in the Tire pressure menu or from the corresponding tire pressure warning when correcting the tire pressure.
  • Tires can lose air over time without a tire defect being present. A tire pressure warning will then appear on the multi-purpose display. Check the tire pressure at the next opportunity.

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