Those readings sound normal.
The P2159 code on a 2008 Kia Optima refers to Vehicle Speed Sensor "B" Range/Performance.
So, there are two speed sensors which sounds like you have found one of them. Here is the location of the pulse generator "B". Check out the images (below). Please upload pictures or videos in your response of any problems so we can see what to help you with.
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Saturday, October 5th, 2024 AT 1:15 PM