Focus Turbo Oil Leak

[T5SOR]

The engine "Malufunction" light came on the otherday, but the car behaves as normal (not in safety mode and not down on power etc.). Looking under the bonnet earlier there is a small oil leak that looks to be around the Turbo. Is this a common problem? Hopefully a seal or something small.

It's a 2008 1.6 Turbo Diesel Econetic. Seems perfectly fine, other than the small patch of oil around the Turbo. Need to get the code looked at, but I am expecting it to be this.

[T5SOR]

I've just bought a Clarke CEOBDS reader and it can find no engine code faults. The enginer light isnt on, but I have an "I" on the computer and Engine Malfunction warning.