2008 Pontiac G8 Owner's Manual - Page 92

4-18 Instruments and Controls Stop and check your tires as soon as it is safe to do so. If underinflated, inflate to the proper pressure. See Tires on page 9-39 for more information. When the Light Flashes First and Then is Solid Tire Pressure Light TPMS Light Malfunction Indicator Lamp Check Engine Light A computer system called OBD II (On-Board Diagnostics-Second Generation) monitors operation of the fuel, ignition, and emission control systems. It makes sure that emissions are at acceptable levels for the life of the vehicle, helping to produce a cleaner environment. This light comes on briefly when the engine is started and provides information about tire pressures and the Tire Pressure Monitoring System. When the Light is Solid This light will also come on when one or more of your tires are significantly underinflated. A CHECK TIRE PRESSURE DIC message will accompany the light. See DIC Warnings and Messages on page 4-27 for more information. This indicates that there may be a problem with the Tire Pressure Monitor System. The light flashes for about a minute and stays on solid for the remainder of the ignition cycle. This sequence will repeat with every ignition cycle. See Tire Pressure Monitor System on page 9-49 and Tire Pressure Monitor Operation on page 9-51 for more information. This light comes on briefly, as a check to show it is working, when the ignition is turned to ON/RUN. If the light does not come on, see your dealer/retailer. If the light stays on it indicates that there is an OBD II problem and service is required.