The way it's typically handled it to use a smoke generator to force smoke into the gas tank & pressurize the system... it will leak from the problem area.... A guy with Dodge dealer experience may know of a common problem area like a fitting that cracks.. Might try a google search for the failure code & your vehicle yr/make/model..
"The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."
