Some help with some fault codes please 1.8T Anni 180bhp

[Jayy]

Hi guys, need some help if possible, its basically not running very well at all, starts fine, drives fine, theres a noise on start up from the air pump I believe, but its not pulling like a 180bhp for sure. Drives more like a 1.6.

Also last saturday the oil pressure warning was coming on and off for a good few hours, kept stopping checking etc, but seemed fine, has not been back on since.

16795 - Secondary Air Injection System Incorrect Flow Detected
16514 - Oxygen Lambda Sensor B1 S1 - Malfunction In Circuit
16396 - Bank 1 Camshaft A (Intake) Advanced Set Point Not Reached - Over Retarded.

I think its not doing so well with the fuel as well, getting around 60-70 miles from £20, 23-27mpg

Any Advise would be great

[dom]

Oil pressure warning and lack of power suggests blocked pickup pipe, what is the mileage on the car?