My 2002 TB-LS has just started doing this: Randomly starts running. I’ve tried removing the battery from the remote key fob, but the engine still started running on its own. I doubt it’s an interference problem as my vehicle has done this while parked outside my home and where I work.

I recently had the transmission fluid replaced. Could the mechanic had done something inadvertently to cause this problem? My vehicle has never done this before.