I have a 2017 Lincoln MKX and I've experienced the wrench symbol coming on, but it doesn't stay on, comes on periodically while driving on highways. The dealership says if it doesn't stay on constantly that they cannot tell what is the matter with it? Does this make any sense to anyone? So, today the light came on and I immediately drove it to the dealer to show that the light was actively on, and that it came on while highway driving. They told me that it was an "electric code B-018-A. However, I cannot find anything online with that code, and dealership told me they can't get it in for service until 2 weeks, and that they'd need it for a couple of days to try and see if light would come back on.