2015 Jeep Grand Cherokee Owner Manual SRT - Page 466

464 STARTING AND OPERATING TIRE PRESSURE MONITOR SYSTEM (TPMS) NOTE: For vehicles equipped with run flat tires - When the TPMS indicates a tire pressure of 14 psi (96 kPa) or lower, always check tire pressure and replace the tire at the first opportunity. At inflation pressure of/or below 14 psi (96 kPa) the tire is in the run-flat mode of operation. In this condition, it is recommended a vehicle maximum speed of 50 mph (80 km/h) for a maximum distance of 50 miles (80 km). Chrysler Group LLC does not recommend using the run flat feature while driving a The TPMS will warn the driver of a low tire pressure if vehicle loaded at full capacity or towing a trailer. the tire pressure falls below the low pressure warning threshold for any reason, including low temperature The Tire Pressure Monitoring System (TPMS) will warn the driver of a low tire pressure based on the vehicle effects, or natural pressure loss through the tire. recommended cold tire pressure. The tire pressure will vary with temperature by about 1 psi (7 kPa) for every 12°F (6.5°C). This means that when the outside temperature decreases, the tire pressure will decrease. Tire pressure should always be set based on cold inflation tire pressure. This is defined as the tire pressure after the vehicle has not been driven for at least three hours, or driven less than 1 mile (1.6 km) after a three-hour period. Refer to "Tires - General Information" in "Starting and Operating" for information on how to properly inflate the vehicle's tires. The tire pressure will also increase as the vehicle is driven - this is normal and there should be no adjustment for this increased pressure. The TPMS will continue to warn the driver of low tire pressure as long as the condition exists, and will not turn off until the tire pressure is at or above recommended cold tire pressure. Once the low tire pressure warning has been illuminated, the tire pressure must be increased to