Tesla MODEL S 2012 Owner's Manual page 237

The tire pressure monitoring system (TPMS) has detected that the air pressure in one or more of your tires is at least
20% lower than the recommended cold tire pressure. This recommended pressure should be displayed on the Tire
and Loading information label.
See Maintaining Tire Pressures on page 165
This alert may appear in cold weather because the air in your tires naturally contracts when it becomes cold,
decreasing tire pressures.
• Although drops in tire pressure are expected in colder weather, air should still be added to maintain the
recommended cold tire pressure.
• The alert may clear as the vehicle is driven. This is because the tires will warm up and the tire pressure will
increase.
◦ Even if the alert clears, the tires should still be refilled with air once they have cooled. For the best experience
with your vehicle, the recommended cold tire pressure should be maintained at all times.
The alert should clear once the Tire Pressure Monitoring System detects that each of your tires is inflated to the
recommended cold pressure.
• The alert and Tire Pressure indicator light may still be present immediately after you have filled your tires to the
recommended cold pressure, but both should clear once you have driven a short distance.
• You may need to drive over 15 mph (25 km/h) for at least 10 minutes for the Tire Pressure Monitoring System to
measure and report your updated tire pressures.
If you repeatedly see this alert for the same tire, have the tire inspected for a slow leak. You can visit a local tire shop
or schedule service using your Tesla Mobile App.
For more information on tire pressure and inflation, see
(MCU_w029)
Service is required
Schedule service now
This alert is set remotely by Tesla when a condition requiring service is detected on your vehicle.
This alert can be set due to various conditions. When you schedule service, more information should be available.
This alert can only be cleared by a service technician after your vehicle has been serviced.
As this alert can be present due to various conditions, it is recommended that you schedule service at your earliest
convenience.
(THC_u0005)
Air conditioning temporarily reduced
Vehicle systems being cooled
Cabin air conditioning performance has been temporarily reduced because your vehicle needs to focus on cooling
the high voltage battery (Battery) and/or powertrain. This is completely normal and does not indicate a problem
with your vehicle or the air conditioning (A/C) system.
In addition to cooling the vehicle interior, the A/C system also cools the Battery. The A/C system's priority is to cool
the Battery to make sure it stays within an optimal temperature range that supports longevity and best performance.
In high temperature environments, it is normal for your vehicle to focus more for brief periods on cooling the Battery.
When this happens, it is most often because the vehicle is supercharging in hot weather.
No action is required. Your vehicle is OK to drive.
Consumer Information
Troubleshooting Alerts
for detailed information on how to keep the tires properly inflated.
Tire Care and Maintenance on page 165.
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