The most likely suspect is a broken clock spring. That is a wound-up ribbon cable in a plastic housing under the steering wheel. The clue is there are multiple symptoms for multiple, unrelated systems that all have a circuit going through that ribbon cable. Eventually, as that cable continues to break, the Air Bag warning light will also turn on, and the computer will disable that system.
Saturday, June 13th, 2015 AT 6:07 PM