2006 Honda Civic Owner's Manual - Page 59

Gauges Fuel Gauge This shows how much fuel you have. It may show slightly more or less than the actual amount. Temperature Gauge This shows the temperature of the engine's coolant. During normal operation, the reading should rise to about the middle of the gauge. In severe driving conditions, such as very hot weather or a long period of uphill driving, the reading may rise into the upper half of the gauge. If it reaches the red (Hot) mark, pull safely to the side of the road. See page 261 for instructions and precautions on checking the engine cooling system. Check Fuel Cap Indicator If your fuel fill cap is loose or missing, a ''CHECK FUEL CAP'' message appears in the information display after you start the engine. The message goes from CHECK to FUEL, then to CAP repeatedly. You will also hear a beep. Turn the engine off, and confirm the fuel fill cap is installed. If it is, loosen the cap, then retighten it until it clicks at least once. When you restart the engine, the message appears again. To clear the message, press and hold the SEL/RESET button until it goes away. Avoid driving with an extremely low f uel level. Running out of f uel could cause the engine to misf ire, damaging the catalytic converter. 66