zigzag1

My car a 2004 S4 no modifications.

I am receiving fault code
16815 - Warm Up Catalyst; Bank 2: Efficiency Below Threshold
P0431 - 001 - Upper Limit Exceeded - MIL ON
While researching the fault code I found a post which explains how to use Vag Com to test for a bad cat. My confusion begins here, this is my first attempt at using the Vag tool for other than finding fault codes. Can someone tell me what is or how I get to

2) reset throttle adaptation (04/060)

4) 04/030 and check o2 sensor control. you want to see 111 in field 1 and 110 in field 2
5) 04/107, and click start test. wait until field 4 goes from test off to test on to syst. ok
6) leave basic settings, crack throttle open briefly so RPMs go over 3k
7) back into basic settings, enter 034, start test, press foot on brake while flooring throttle. RPM's will increase to about 2300. Test will begin soon after exhaust gas temperature passes 350 degrees. Test will run, and you should see B1S1 OK.
8) now go to basic setting group 036, start test, at idle, and see if the rear sensor tests ok. you should see B1S2 OK.
9) repeat step 8 in setting group 037
10) group 043, start test, brake and throttle together again, and run test until you see B1S2 OK.
11) and now for the litmus test. go to group 046, brake and throttle together, and run the test. test likely won't start until exhaust gas temp goes over 550.

bearthebruce

Do understand what the nomenclature (04/060) means? If not, let me help.

Start VCDS/VAG-COM. Open the 01-Engine. Now look at the lower right of the screen. Notice Basic Settings-04? That's the 04 in the parenthesis above. Now, when you go to basic settings, the one that you refer to in this procedure requires you to use Group 060 to do the basic setting. So, you go there and initate the setting by hitting the ON/OFF/Next function.

Now that I have explained that short hand, does the rest of the procedure make sense?

zigzag1

Thank You