It sounds like one of two things has happened. Either you have a fuse that is out becasue there are 5 that run the system or the steering wheel sensor is not working right. Here are some wiring diagrams for the electric power steering system EPS and a couple guides to help us get started testing (easy).
You will need to remove the driver's side airbag this guide will give you a generic version of that with. We have specific diagrams of your car (below)
Next would be the turning wheel position sensor. Here is a guide to ehlp you see what you are in for when taking off the steering wheel. (yours will need a puller)
These diagrams below show the entire system so others can see how it works. Also I have fuse panel diagrams at the end.
Check out the diagrams (Below)
Please let us know what you find. We are interested to see what it is.
Images (Click to enlarge)
Thursday, December 7th, 2017 AT 5:17 PM