Ambient Temperature Change and Tire Pressure
Tire pressures fluctuate with temperature changes. For this reason, tire pressures must be set to specification when tires are at outdoor ambient temperatures. If the vehicle is allowed to warm up to shop temperatures, and the outside temperature is less than shop temperature, the tire inflation pressure must be adjusted accordingly.
If the tires are inflated to specification at shop temperatures, and the vehicle is moved outdoors when the outdoor ambient temperature is significantly lower, the tire pressure may drop enough to be detected by the TPMS and illuminate the TPMS warning indicator.
As the ambient temperature decreases by -12.2° C (10° F), tire pressure decreases 6.9 kPa (1 psi). Adjust the tire pressure by 6.9 kPa (1 psi) for each -12.2° C (10° F) of ambient temperature drop as necessary to keep the tire at the specified VC label pressure. To adjust the tire pressure indoors for colder outside temperatures, refer to the following table.
| Tire Placard Pressure | |||||
|---|---|---|---|---|---|
| 29.7 psi (205 kPa) | 31.9 psi (220 kPa) | 34.1 psi (235 kPa) | 34.8 psi (240 kPa) | 37.7 psi (260 kPa) | |
| Outside Temperature | Tire Target Pressure | ||||
| 69.8°F (21°C) | 29.7 psi (205 kPa) | 31.9 psi (220 kPa) | 34.1 psi (235 kPa) | 34.8 psi (240 kPa) | 37.7 psi (260 kPa) |
| 60.8°F (16°C) | 31.2 psi (215 kPa) | 33.4 psi (230 kPa) | 34.8 psi (240 kPa) | 36.3 psi (250 kPa) | 39.2 psi (270 kPa) |
| 50.0°F (10°C) | 31.9 psi (220 kPa) | 34.1 psi (235 kPa) | 36.3 psi (250 kPa) | 37.0 psi (255 kPa) | 42.1 psi (290 kPa) |
| 39.2°F (4°C) | 33.4 psi (230 kPa) | 34.8 psi (240 kPa) | 37.0 psi (255 kPa) | 37.7 psi (260 kPa) | 42.8 psi (295 kPa) |
| 30.2°F (-1°C) | 34.1 psi (235 kPa) | 36.3 psi (250 kPa) | 37.7 psi (260 kPa) | 39.2 psi (270 kPa) | 44.2 psi (305 kPa) |