OP UPDATE!!! I took it to our local mechanic, and it was the "Wheel Speed Sensor- Right Front" that caused all the warning lights to go crazy. The sensor itself didn't fail, but the wire was broken. Looking at the wire it didn't appear that it was a clean cut but maybe a critter (squirrel?) bit it. There were no other gnaw marks on it, so I don't know. There were no issues the day before when my wife was driving it but the next morning, when she started it, all the warning lights came on. All I know is it cost $170.20 (parts, labor and tax) to have it repaired. I did replace the four-year-old battery ($110.00) first, but that probably would have been needed in the near future. Life is good. Thanks for all your input.