Audi Q7 2007 fault codes

Good afternoon, they brought me to scan an Audi Q7 and I got 4 fault codes, 02129, which refers to the failure of the automatic day and night of the outer mirror and another 3 that are 05155, 05137 and 09523 that have no description in my scanner and I have been looking for the network and I can't find anything, I hope someone can explain that these three codes mean without definition. THANK YOU

I get out.

02129: P0851/ 2129/0851/ Positioning Position/ Point Switch Point - Low entrance signal.

05155: P1423/ 5155/1423/ PLEASE EXHAUST GASES - FUNCTIONAL TEST.

05137: P1411/ 5137/1411/ Secondary air injection - Low flow.

09523: P2533/ 9523/2533/ Ignition Switch Run/ Start Position Circuit.

I hope it helps you.