It will not shift out of first gear. Service engine soon light is on. Reverse works fine and so does first gear, just will not shift after moving.

The transaxle Control Module (TCM) monitors the malfunction of sensors and actuators relating to transaxle control. When the TCM detects a malfunction with the control, a signal is send to the Engine Control Module (ECM) to trigger the Engine Light or Service Engine Soon light. The ECM stores the P0700 code and it means the TCM detected a malfunction with the transaxle controls.
Read more: http://engine-codes.com/p0700_dodge.html#ixzz3Pn5lTBcI

Need transmission repair. Sorry.

Check your brake lights, if the system doesn't get a brake lights on signal it will not release park, it is called the park lock system.

if check engine light is on then it has codes in it, period. need to get scanned somewhere else

I doubt the two problems are connected. I would try a new gas cap and see what happens since it runs fine. The service engine soon light won't reset on it's own right away.

If there is an Auto Zone or any other large auto parts store, have them scan the truck for the DTC codes. The DTC codes will identify the Issues that needs to be addressed in your engine and transmission that has set off the service engine light on. Once the issues has been resolved, the light will reset it self after the third start up and after 40 start up will erase it self from the history as long as there is no additional issues. Good luck and hope this helps, Shift suddenly become very hard. When going from park to either reverse or drive it slams into gear. 1-2 and 2-3 shifts are also harsh. All gears seems to work. Problem may be intermittent: Check TPS for smooth electrical response. If the response is jumpy or erratic at all, replace TPS.

If I understand you correctly, you have ALL forward gears working, but reverse doesn't?... then the problem is in the transmission itself or the linkage on the trans linkage into reverse.

Reverse & 2nd gear share the same clutch pack.Usually when reverse goes out you will get wierd shifting into 2nd or 3rd.Most likey the Input shaft retaining nut has come loose inside the first clutch housing.It can be accessed from the trans end cover but it will take some disassembly.The trans doesn't have to come out to correct this problem.I repaired many saturns with this problem.The only parts you will have to buy is an end cover gasket(paper gasket) & 41/2 qts Trans fluid.Decent mechanice could do this in about 2-3 hrs or less.The service engine light is probally on due to trouble codes from the trans controller most likey DTC P0723 No 2nd gear.hope this helps

The light issue was your computer recanizing that thare was and isue with your trans and did the service engine soon light go on when this happend.
Well it sounds like you need a new trans not cheap

I have a Dodge Charger 06 model and the gear wont move from Park to reverse. everything else works as far as gas, brake light, etc but my gear wont shift can i get soem help