Question

2011 Hyundai Sonata 2.0t with engine code P2159, what does the code mean? how should I start diagnosing the code?

Answer 1

Start by checking the Right Front Wheel Speed Sensor, also known as ABS Speed sensor. There is one sensor on each wheel. You can find more information here:

P2159 Hyundai Code - Vehicle Speed Sensor 'B' Circuit Range/Performance
Read more: https://www.autocodes.com/p2159_hyundai.html