Speed senser

Anyone having trouble with their speed senser on their sentra? Mine is causing a check engine light and a faulty speedometer. Any thoughts?

Well no one commented on this post but here is the solution anyhow.a faulty speedometer will give a check engine light and cause your trans not to lock up the converter in overdrive(zero slippage). It will also cause your cruise control to stop working. I fixed all of these problems by just plugging in a used cluster.
Six screws is all itvtakes to remove it,unlike the book tells you.