← Back to list

2003 Jeep Liberty P0700 Transmission Control System Malfunction - How to Diagnose and Fix

Model: 2003 Jeep Liberty Fault Code: P0700 Posted: 2006-07-21 19:18

The check engine light on my 2003 Jeep Liberty has come on, and I recently learned how to retrieve the fault code using an OBD2 scanner. The only code I've found is P0700 — Transmission Control System Malfunction. This code is quite generic, but I'm looking for specific insights into what it could indicate and whether there's a straightforward fix. Does this point to a sensor issue, wiring problem, or software glitch? And do I need to visit a dealership for diagnosis, or can a local auto shop handle it? I've noticed the check engine light is intermittent — it turns off and on, but has now gone off. Still, I'd like to understand what's causing this and how to resolve it properly.

Related fault codes
P0700
Comments (3)
Anonymous 2006-07-22 06:05

To get a more accurate diagnosis, you'll need to read the transmission-specific codes from the transmission control module (TCM). Check if your vehicle is shifting smoothly — does the gear shift feel normal? And is the speedometer functioning correctly?

Anonymous 2006-07-23 14:57

The shifting feels normal and the speedometer works fine. No other symptoms have been noticed, except for this check engine light, which has been flickering on and off — it's now off. How can I retrieve transmission-specific codes? Can a regular OBD2 scanner read these, or do I need to go to a dealership or AutoZone? Are the transmission codes different from the P0700 code I pulled earlier? Any guidance would be greatly appreciated!

Anonymous 2006-07-24 10:04

You don't necessarily need a dealer. A qualified auto shop with access to updated TCM diagnostic software can read and interpret these codes. The dealership will typically have the latest software, but many independent shops carry it too. Depending on what specific code is returned (e.g., P0703 or P0715), the issue might be a simple software update, sensor calibration, or wiring fault. If you share the full transmission-related codes, I can help explain their meaning and potential fixes.