2011 Chevrolet Volt Owner's Manual - Page 167

Instruments and Controls 5-47 Drive Mode Messages MOUNTAIN MODE NOT AVAILABLE This message displays when in Mountain Mode and the mode becomes unavailable. See "Mountain Mode" under Driver Selected Operating Modes on page 9‑26. Electric Drive Unit Messages SHIFT TO PARK This message displays when the vehicle should be shifted to P (Park). This may appear when attempting to turn off the vehicle when it is not in P (Park). ENGINE OVERHEATED - TURN VEHICLE OFF This message displays and a continuous chime sounds if the engine cooling system reaches unsafe temperatures for operation. Stop and turn off the vehicle as soon as it is safe to do so to avoid severe damage. This message clears when the engine has cooled to a safe operating temperature. SPORT MODE NOT AVAILABLE This message displays when in Sport Mode and the mode becomes unavailable. See "Sport Mode" under Driver Selected Operating Modes on page 9‑26. Engine Cooling System Messages ENGINE OVERHEATED - REDUCE SPEED This message displays when the engine coolant temperature or engine oil is too hot. Reduce speed and allow the vehicle to cool down. ENGINE RUNNING DUE TO TEMPERATURE This message displays when the high voltage battery is charged but the engine has to come on because of the outside temperature or high voltage battery temperature.