P0585 is Cruise Control Multi-Function Input A/B Correlation
Trouble code P0307 means:Cylinder 7 misfire detected
Trouble code P0627 means: Fuel Pump Control Circuit / Open
P0073 Ambient Air Temperature Sensor Circuit High Input
Trouble code P0456 means: EVAP Control System Very Small Leak (0.020") Detected
Trouble code P1604 means:PCM internal dual-port RAM read/write integrity failure
Trouble code P0121 means:Throttle/pedal position sensor/switch A circuit range/performance problem
P0302 (M) Cylinder #2 Misfire Misfire detected in cylinder #2
Trouble code P2106 means: Throttle actuator control (TAC) system-forced limited power mode
Trouble code P0610 means: Control Module Vehicle Options Error
55 code is not an error code, it signals end of codes. If no other codes preceded it, you have no error codes.
Trouble code P0149 means:Fuel Timing error
Code P0420 is: Upstream catalytic conveter efficency below threshold. Bring your car to your Dodge dealer and have them fix it under warranty. A 2003 Dodge Neon has a 5 year 50,000 mile warranty on emissions!