2007 Chevrolet Aveo Owner's Manual - Page 181

The ABS warning light will come on briefly when you turn the ignition to ON. This is normal. If the light does not come on then, have it fixed so it will be ready to warn you if there is a problem. Malfunction Indicator Lamp Check Engine Light Your vehicle has a computer which monitors operation of the fuel, ignition, and emission control systems. Hold Mode Light If your vehicle has this feature, this light will come on when the hold mode is active. If the HOLD mode light flashes, have your vehicle checked. See "Hold Mode" under Automatic Transaxle Operation on page 111 for additional information on this feature. This system is called OBD II (On-Board Diagnostics-Second Generation) and is intended to assure that emissions are at acceptable levels for the life of the vehicle, helping to produce a cleaner environment. The Check Engine light comes on to indicate that there is a problem and service is required. Malfunctions often will be indicated by the system before any problem is apparent. 181