2010 Cadillac CTS Owner's Manual - Page 133

Instruments and Controls If, after several seconds, both status indicator lights remain on, or if there are no lights at all, there may be a problem with the lights or the passenger sensing system. See your dealer/retailer for service. 4-23 Charging System Light If a short distance must be driven with the light on, be sure to turn off all accessories, such as the radio and air conditioner. { WARNING If the airbag readiness light ever comes on and stays on, it means that something may be wrong with the airbag system. To help avoid injury to yourself or others, have the vehicle serviced right away. See Airbag Readiness Light on page 4‑21 for more information, including important safety information. Malfunction Indicator Lamp The charging system light comes on briefly when the ignition is turned on but the engine is not running, as a check to show the light is working. It should go out when the engine is started. If the light stays on, or comes on while driving, there may be a problem with the electrical charging system. Have it checked by your dealer/retailer. Driving while this light is on could drain the battery. When this light comes on, the Driver Information Center (DIC) also displays a message. See Battery Voltage and Charging Messages on page 4‑37. A computer system called OBD II (On-Board Diagnostics-Second Generation) monitors operation of the fuel, ignition, and emission control systems. It ensures that emissions are at acceptable levels for the life of the vehicle, helping to produce a cleaner environment. This light comes on when the ignition is on, but the engine is not running, as a check to show it is working. If it does not, have the vehicle serviced by your dealer/ retailer.