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2001 Chrysler Town & Country 3.8L Transmission P0700 Code: Cold Start Fine, Rough in 3rd Gear When Hot

Model: 2001 Chrysler Town & Country Fault Code: P0700 Posted: 2018-08-25 10:50

My 2001 Chrysler Town & Country with a 3.8L engine is displaying transmission fault code P0700. The vehicle runs smoothly when cold, but as it warms up, the transmission becomes rough and fails to shift properly into third gear. I've already checked fuse #15 in the 'Intelligent Power Module' and replaced it, but the issue persists. I believe this is a transmission control system problem, possibly related to sensor feedback or internal shifting mechanism failure. The P0700 code indicates a general transmission control malfunction—could be due to faulty sensors, wiring, or a failing transmission control module (TCM). I've tried the key-on-off reset trick, but it does not resolve the issue. Any advice on diagnosing this specifically in a 2001 Chrysler Town & Country would be greatly appreciated.

Related fault codes
P0700
Comments (4)
Anonymous 2018-08-25 11:44

I suspect you might have tried the key-on-off reset trick, but that's not sufficient. To properly diagnose, you should use a free OBD2 scanner at most auto part stores to retrieve all stored fault codes. The P0700 code often points to issues in the transmission control system—such as a faulty sensor or wiring. Also, check if the transmission relay in the 'Intelligent Power Module' clicks when switching from off to run. If it doesn't click, that could indicate an electrical issue. Confirm fuse #15 is intact and properly seated.

Anonymous 2018-08-26 10:53

You're absolutely right—the key-on-off trick doesn't solve the problem. I've already checked fuse #15 and replaced it with a new one, but the symptoms remain unchanged. The vehicle still fails to shift correctly into third gear when warm. Any additional troubleshooting steps or potential components to inspect would be very helpful.

Anonymous 2018-08-27 10:47

Confirmed—there's a specific lack of proper shifting in third gear, especially as the engine warms up. I've verified fuse #15 and replaced it, but the issue persists. Are there any other known causes or diagnostic procedures for P0700 on this model year and trim?

Anonymous 2018-08-29 07:10

To get a clear diagnosis, you must use an OBD2 scanner at a local auto parts store—many offer free code reading. This will help identify whether the P0700 is accompanied by other related codes (like P0715 or P0731), which can point to specific sensor failures or transmission issues in the 2001 Chrysler Town & Country.