Black plate (62,1)Cadillac STS Owner Manual - 2011Tire Pressure LightFor vehicles with a tirepressure monitoringsystem, this light comeson briefly when the engineis started. It providesinformation about tirepressures and the TirePressure MonitoringSystem.When the Light is On SteadyThis indicates that one or more of the tires issignificantly underinflated.A tire pressure message in the Driver InformationCenter (DIC), can accompany the light. See DriverInformation Center (DIC) on page 4‑69 for moreinformation. Stop and check the tires as soon as it issafe to do so. If underinflated, inflate to the properpressure. See Inflation - Tire Pressure on page 6‑58for more information.When the Light Flashes First and Then isOn SteadyThis indicates that there may be a problem with the TirePressure Monitor System. The light flashes for about aminute and stays on steady for the remainder of theignition cycle. This sequence repeats with every ignitioncycle. See Tire Pressure Monitor Operation onpage 6‑62 for more information.Malfunction Indicator LampA computer system called OBD II (On-BoardDiagnostics-Second Generation) monitors operationof the fuel, ignition, and emission control systems.It ensures that emissions are at acceptable levels forthe life of the vehicle, helping to produce a cleanerenvironment.4-62