Check Filler Cap Indicator Light

After refueling and turning ignition on, PCM detects a fuel level increase. When the ignition is turned off, PCM activates a brief test to check filler cap. If filler cap was not properly installed and vehicle is started and driven at a speed greater than 6 MPH (10 Km/h), the CHECK FILLER CAP light on instrument panel will illuminate for 25 seconds, then go out. The second time the ignition is cycled off, PCM is activated to test filler cap. If loose, when vehicle is started and driven at a speed greater than 6 MPH (10 Km/h), CHECK FILLER CAP light will be illuminated for 25 seconds, then go out. If filler cap is properly secured, Malfunction Indicator Light (MIL) will not be illuminated and a fault code will not be stored in PCM. The third time ignition is cycled off, PCM is activated to test filler cap. If loose, a LARGE LEAK fault code is stored in PCM. MIL will be illuminated the next time engine is started. Variable indicator light and PLEASE CLOSE FILLER CAP check control message will be displayed.