One problem related to automatic transmission control module has been reported for the 2005 Chrysler 300C. The most recently reported issues are listed below.
The vehicle will stall out several times after filling the tank with gas and it only stalls out after filling the tank. Vehicle will stall when stopped or when the rpm is low. The problem is the vapor/liquid separator valve located at the top of the fuel tank. The valve is designed to prevent liquid fuel from entering the charcoal canister/emissions system. When the valve fails, liquid gas can enter the line and fill the charcoal canister. After refueling the pcm on the vehicle detects a change in fuel level. Then, when the engine meets certain temperature and driving criteria, the pcm issues a purge command to the charcoal canister to remove the stored gas vapors. It's at that point that all the liquid gas in the line gets sucked into the charcoal canister. The pcm expects to see gas vapors entering the intake manifold and it is prepared to adjust air/fuel mixtures to compensate. However, it is not prepared to see liquid gas coming into the intake. That¿s what causes the engine to stall. This can be a very dangerous situation with the vehicle on the road in traffic. I've read in multiple online forums this same situation is happening to many on the Chrysler 300c early year models. Hopefully a recall will be created to resolve this situation.