One problem related to auxillary tank has been reported for the 2005 Dodge Magnum. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Dodge Magnum based on all problems reported for the 2005 Magnum.
Magnum 5. 7l rt awd. . . . . Stalls repeatedly after gas tank fill-up. Takes about 5 minutes of running before engine runs normally. Extremely dangerous when driving in heavy traffic. Dealer says they can find nothing wrong (ie no error codes). Internet search locates many others who have same problem and same dealer response, but indicate that it is a fault of the gas tank emissions components.