My 2013 Jeep Wrangler Sport has a unique problem that I could not find searching this forum. The ABS and traction control lights come on every time I start the engine but only after I start moving. Then they will go off after driving about 100 yards, this is very repeatable. I am familiar with a speed sensor causing a similar issue but the difference is a fault code will tell you which sensor is causing the problem and the lights will come on and stay on until the faulty sensor is either cleaned or replaced. I just purchased a VGate ODB2 reader and no codes exist when the lights are on. I have not purchased a license for it yet, maybe its a hidden fault code.