Nox Sensor And Intake system Issue Help!!

[AzWinnie]

Hi,

Recently purchased a a3 2.0 fsi 04 plate, really nice condition and runs really smoothly, i connected up my brother in laws diagnostics machine, because i had a light on which read
00810: Sensor 1/2 for brake pressure
00778: Steering Angle Sensor
01424: Lateral acceleration Sensor
Then a few days later after i started to service it ( changed fuel/oil filter and spark plugs, currently have disc’s and pads to go on ) my engine management light came on when i was out which said 
P1072: Nox Sensor heating control signal: electrical error in circuit
P2279: Intake air system leak 

really annoyed and stuck on what could be the issue, any advice would be much appreciated

[AzWinnie]

Any ideas?