Code P0700, will not reverse after changing solenoid?

SUBIEROO SHAY

MEMBER
2005 DODGE NEON
196,000 MILES

My car was fine until the shift cable became too hard to shift and I had to use both hands to get it to reverse. Changed out the shift cable with another one from an identical car but the next day it went into limp mode and was showing code p0700. Replaced both speed in and out sensors and no change. Changed out the automatic shift solenoid block and now it won't reverse. Can hear it go in reverse but car won't move once gas is applied. Don't think it will go forward either. I've cleared all the codes and it keeps. Owing back except now it won't go at all so no codes are coming up. Why would all this happen because of a sticky cable?

Sunday, August 13th, 2023 AT 6:29 PM

2 Replies

KEN L

MASTER CERTIFIED MECHANIC
50,271 POSTS

The diagnostic trouble code (DTC) P0700 in a 2005 Dodge Neon refers to a generic transmission-related issue. It's a code that serves as a general indicator that there's a problem with the transmission control system, and it's often accompanied by other more specific transmission-related trouble codes.

Please check the transmission fluid level and make sure you use the correct fluid, or the transmission will not work.

Fluid Types

Automatic Transmission Fluid Type .................... Mopar ATF+4 Automatic Transmission Fluid
Capacities

Automatic Transaxle

Estimated Service Fill .................... 4.0 Qt (3.8L)

Overhaul Fill Capacity w/Torque Converter Empty .................... 8.6 Qt (8.1L)

You could have a transmission control relay that has gone out, here is the location so you can check it out. Also check the fuses.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the images (below). Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.

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Monday, August 14th, 2023 AT 5:32 PM

STEVE W.

MECHANIC
14,046 POSTS

Code P0700 isn't an actual code, it is a marker telling you that there is a code(s) stored in the transmission control module. However, if it became very hard to shift it's very possible, especially with the rest of that info that the manual shift valve isn't correct or the internal valving or a gasket failed so it isn't creating pressure to operate the transmission. I would suggest first getting a scan tool that can read and talk to the TCM, see what code(s) are actually there and possibly check on the solenoids to see if a gasket or O-ring failed.

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Monday, August 14th, 2023 AT 5:48 PM