2006 Chrysler PT Cruiser Owner Manual - Page 328

328 STARTING AND OPERATING NOTE: Tighten the gas cap about 1/4 turn until you hear one click. This is an indication that cap is properly tightened. If the gas cap is not tighten properly, the Malfunction Indicator Light will come on. Be sure the gas cap is tightened every time the vehicle is refueled. WARNING! A fire may result if gasoline is pumped into a portable container that is inside of a vehicle. You could be burned. Always place gas containers on the ground while filling. Loose Fuel Filler Cap Message If the vehicle diagnostic system determines that the fuel filler cap is loose, improperly installed, or damaged, a "gASCAP" message will be displayed in the Odometer/ Trip Odometer in the instrument cluster. Refer to "Instrument Cluster Description" in Section 3 of this manual. Tighten the fuel filler cap properly and press the odometer/trip odometer reset button to turn the message off. If the problem continues, the message will appear the next time the vehicle is started. Refer to "Onboard Diagnostic System - OBDII" in Section 7 of this manual for more information.