keep getting this damn code

[happy]

PO455 every second time I take car out it comes on how can I fix this ? I keep turning it off with my sct.but its getting annoying!! 02 gts

 

[Viper Specialty]

EVAP, Large Leak Detected. Check all of your EVAP lines for obvious cracks and damage. Try replacing Gas Cap. Besides that, you will need a DRB3 Scan Tool [Dealer Equipment] and a Smoke Machine to locate the leak if not obvious and hidden.

 

[8.0L>1.8T]

This code plagued me as well on my '98. Ended up being 2 torn hoses on the EVAP assembly behind the driver side fog light.
Fascia removal was required. Code never came back.
Good luck bud.