Not sure why your codes are showing only 6 cylinders! (Ie Cyl #1-3)
Because of this, I am suspect on whether or not you are in the correct table...
In table 18, 50 is related to the secondary air system.
Did you try reseting the codes and see what comes back?
Also, are you sure all segments in the peake are working right?
The 1st code back looked like 1b, where the b loos like a 6, but is not really, per the manual.
I also was puzzled by the code descriptor cyl 1-3. I thought that it was odd, given my 8 cylinder s62.
I will check the code again tonight when I get home, to be sure. Regarding whether my reader is working correctly, that I do not know, as I just received it yesterday.
I was hesitant to reset the codes last night until I could gain an understanding of how to interpret them.
I will try that again tonight as well.
thanks for the insight... will let you know what I find out.