Dodge 2012 Grand Caravan, Owner'S Manual

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The TPMS will warn the driver of a low tire pressure if
the tire pressure falls below the low pressure warning
threshold for any reason, including low temperature
effects, or natural air pressure loss through the tire.
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 placard pressure. Once the low tire pressure
warning has been illuminated, the tire pressure must be
increased to the recommended cold tire placard pressure
in order for the “Tire Pressure Monitoring Telltale Light”
to be turned off. The system will automatically update
and the “Tire Pressure Monitoring Telltale Light” will
extinguish once the updated tire pressures have been
received.
NOTE: The vehicle may need to be driven for up to 20
minutes above 15 mph (24 km/h) to receive this infor-
mation.
For example, your vehicle may have a recommended
cold (parked for more than three hours) tire placard
pressure of 35 psi (241 kPa). If the ambient temperature is
68°F (20°C) and the measured tire pressure is 30 psi (207
kPa), a temperature drop to 20°F (-7°C) will decrease the
tire pressure to approximately 26 psi (179 kPa). This tire
pressure is sufficiently low enough to turn on the “Tire
Pressure Monitoring Telltale Light.” Driving the vehicle
may cause the tire pressure to rise to approximately 30
psi (207 kPa), but the “Tire Pressure Monitoring Telltale
Light” will still be on. In this situation, the “Tire Pressure
Monitoring Telltale Light” will turn off only after the tires
have been inflated to the vehicle’s recommended cold tire
placard pressure value.
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