Hi I have a 2011 cx7 2.2d it has a strange problem, sometimes the speedometer is very erratic showing 100mph when doing around 30, and showing about 40mph when stationary. Other times it reads fine until it drops to zero along with the engine management light on, limp mode, tyre pressure warning and steering warning? When the codes are read it says speed sensor a, but I can’t find a speed sensor anywhere? Can anyone shed some light please?

 

What are the actual codes?