Oil light on ??

[R32crew]

Hi guys..

Yesterday on a motorway journey all of a sudden my oil light came on (red)

Luckily the next service was right there.

I pulled up & checked the oil it was slightly under half. Anyway I topped it back up to the full mark.

The oil light went off so I carried on a few miles down it was back on again.

So I got off the Motorway & it went off again.

I drove on local roads for about 15/20 miles it was fine but as I got back on the motorway it was back on again.

It started flashing then stayed on This time the EM light also came on.

So I pulled up & I have an OBD fault reader tool in my car.

It came up with a fault code P0012 A Camshaft Position Timing Over Retarded Bank 1.

Any one have any idea what this is & why this happened 

Cheers 

[RadicalCoupe-Fuji]