My 2001 LS430 while I am driving on the freeway or on the street my sunroof suddenly will open. please help. thank u

 

Sounds like the switch needs replacing but could also be a bad connector or bad earth.

 

Had the same thing happen 3 times on a single day, a few weeks ago. Never happened after that. It happened to be on the day I hosed off the car with a pressure washer. Coincidence?

Have you had a lot of rain lately? Or a high-pressure car wash?

 

To white_LX only happened early morning. I drive to work at 4am in the morning. could it be moist?