I had the same problem with my paddle shifters, they just stopped working while driving. I read the information on this thread, made all the checks and inspections, and found nothing. I decided to try a trick we did years ago with cars and trucks that had phantom problems, we would disconnect the battery cable, touch them together, and then reconnect them back to the battery, and voila, my shifters work well now. I was told this drains the capacitors in the computers and resets them.