have an 05 dodge neon replaced water pump started car up would not idle

is the check engine light on?

The red dot light: It's for the vehicle Anti-Theft Security System, when the Fob is locked it blinks and shows the vehicle is in Theft Mode, If the wrong key is used it will stay on the car runs for a few seconds until the injectors are shut off. I have the same car, do you have a yellow light on that kind of looks like an engine. You can go to Advance Auto and ask to use a trouble code scanner, with car off under the dash by your left knee, theres a plug to plug in the scanner. turn scanner on. it should tell you to turn key to on not start and enter what it needs for info. very easy. right down the codes and post them here. Even if there is no engine light on its free, and fun to practice. engine size is on top of the motor, if you need it for the scanner.