Hi iv just changed the timing belt on my 2009 skoda octavia 2.0 tdi vrs and now it won't start and coming up with code p0016 it turns over for a couple of seconds then stops any help would be much appreciated 

You've just changed the Timing Belt and the car is now saying Camshaft Position Sensor Incorrect Correlation.

Cam Timing wrong seems the obvious answer, having just removed and replaced the timing belt 

Was the cam sensor damaged or unplugged while doing that.

Are you getting any VCDS measurement blocks reading from the cam sensor to prove the cam sensor is still functioning.

 

I haven't checked for a reading as my first thought was timing I'm going to pull it apart this morning and recheck timing 

If it's a tooth out could it cause none start and p0016

A few millimetres can cause that.

You must do a few turns of the crankshaft manually once the new belt is all fitted and tensioner completed.

You need to ensure all the locking tools just slide in again easily.

I've often found I've had to loosen the camshaft sprocket bolts again and adjust a little when doing pd engines, maybe yours is similar. Any top sprockets can need a little adjustment. After that another 2 crankshaft turns and it was still good on re-testing with the locking tools.

That's actually when I finally do the final +90° tighten