First Real Problem...

[Dilligaf-UK]

Whilst the wife was out and about in my A4 today (relegating me to her A2), she had trouble starting it and once it did kick into life, the EPC light was illuminated on the dash. When she got home, I plugged VCDS in and read off the following error:

16706 - Engine Speed Sensor (G28): No Signal

P0322 - 004 - No Signal/Communication - Intermittent

Now I'm guessing it's a Crank or Cam Sensor, but where is it located on the BEX lump - I intend to check the wiring first, then if necessary change the sensor. Any idea on price for the Sensor?

Thanks in advance

Rob