Trouble code P0594 means: Cruise control system,servo control - circuit open
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
P0585 is Cruise Control Multi-Function Input A/B Correlation
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.