2007 Pontiac Vibe Owner's Manual - Page 331

This light, on the instrument panel cluster, comes on when the tire pressure monitoring system detects a low-tire condition. See Inflation - Tire Pressure on page 329 and Loading Your Vehicle on page 253 for additional information. Note: The tire pressure monitoring system on your vehicle warns you when one of the tires is significantly under-inflated and when some combinations of the tires are significantly under-inflated. However, there are other combinations of significantly under-inflated tires for which the tire pressure monitoring system might not give a warning. These other combinations are relatively common, accounting for approximately half the instances in which vehicles have significantly under-inflated tires. For example, the system might not warn you when both tires on the same side or on the same axle of your vehicle are significantly under-inflated. It is particularly important, therefore, to check the tire pressure in all of the tires regularly and maintain proper pressure. In order for the tire pressure monitoring system to work properly you need to reset (initialize) the tire pressure monitoring system. Any time you check and/or adjust a tire's pressure, repair or replace a tire or wheel, or rotate the tires the tire pressure monitor system needs to be reset. This light also comes on for a few seconds and then go off when you turn the ignition to ON. This indicates that the TPMS is functioning properly. If the low-tire pressure warning light comes on while driving your vehicle, the system may have detected a low-tire condition. You need to stop as soon as possible and check your tires for damage. If a tire is flat, see If a Tire Goes Flat on page 342 and Changing a Flat Tire on page 343. Also check the tire pressure in all four tires, and set them to the specified level shown on the Tire and Loading Information label. 331