Error codes are:

00285 speed sensor (right front)
00778 steering angle sensor
0196 Oil temperature sensor

I recently changed the inner CV joint on my vehicle and now I have all of these error codes. The steering light is on as well as ABS light and Traction control light. This is on a 2006 Touran. What could be the cause of this and are there any suggestions as to a solution. Thanks in advance for your advice.