There is a feature that will not allow it to go out of park unless the brake is on, check to see if the brake lights work, if not it could be a fuse or brake switch. If they work then the cable going to the shifter may have broken.
I just fixed a 2002 Dodge Neon that would not shift up it was stuck in low gear replaced TCM now trans is working fine
check the fluid level
To repair a stuck gear shift in a Dodge Neon, it is best to refer to a manual for the vehicle. A full explanation should be found in it. This is considered a major repair so it may be best to have a professional to fix the issue.
More than likely your shift cables need to be lubricated.
I have a 2005 dodge neon that did the same thing. The engine light came on and it wouldn't shift out of first gear. I took it to the dealer, it was the main computer. I don't know how much is was because it was under warranty.
Hope I'm not too late. I found a shift cable bushing for my neon on Ebay. Highly recommend this - costs $20 !!!
P0700 EATX code present. P0731 Gear ratio error in first gear.
No, do you?
It is likely that the shift cable bushings at the transmission have failed.
Trouble code P1899 means: Park/ Neutral switch stuck in park or gear
I am not a mech. but I own a 2002 dodge neon sxt 142,000 mi on it and have had all the regular problems with the transmision.If you have an auto trans, and it is stuck in 1st or 2nd gear here is a link that might help there are 13 parts to the video. http://www.youtube.com/watch?v=46VeVdRdkpc&playnext=1&playnext_from=QL
Can be Lower or high out putt sensors check it out with mechanic I had the same prblems with my 2003 dodge neon