I had this issue as well. At the time the recommended fix was to drop the plastic panel under the steering column, disconnect then reconnect the pig-tail three or four times to wipe corrosion from the connection. Push back together and secure with a tiny zip-tie.
This is really simple and required the removal of the under-dash light from the plastic panel to make access that much better. Takes about 20 minutes for a newbee. I'll see if I can find a picture of the pig-tail on the web for you. If I recall it was basically the first pig-tail you will see and also the easiest one to grab.
Before you spend a penny try this really easy fix and see if it works for you.
My problem was solved and never returned.
Edit: My "Service Active Handling" warning popped up only during very low speed maneuvers like parking and slow but tight corners. I think it came on once when I first started my car ....
Dick