Do you actually need the DP fix with Cobb? If you are running stg 2 you won't get any error codes.
Or is that for an emissions test?
Current: 2011 F20 120d SE & E90 335i
2010 Alpine White N55 135i 6MT, 2009 LMB LCI N54 135i - Cobb tuned!, 2010 F10 530d SE, 1986 E30 318i
1981 E21 320i Auto