Hi,

I was wondering if anyone has had this same problem. I know they say to replace the tcu to fix the "limp mode" issue. But mine only happens when it is raining out or when the ground is wet. When it is dry it goes back to normal or when I start it up it never happens.
Didnt pull any codes, just wondering if someone else had these symptoms.
Thank you
Ron

 

I would short the service connector to get any error codes stored on the TCU to see if this is a sensor problem. Count the D4 light (or maybe the S light?) flashes.

See this site for instructions:
techautorepairs.com/transmission.html#troubleshooting