Originally Posted by b1aze
Originally Posted by Tee-Dub
I don't have a JB4, but I'm pretty sure you have to use the BMS USB cable (if you bought one) and hook your computer up to the JB4 to get the codes.
This. In the JB4 computer interface, there is a "read codes" button that will spit out, in your case, a bunch of codes.
I have read the codes but all it did was move the speedo an flash some lights no actual codes displayed
11' 335d 74k Miles - K&N Drop In
08' n54 135i Alpina-AT 107k Miles - SOLD
Engine: JB4 e40/93, AFE DCI, VRSF 5" FMIC V2, VRSF Upper/Lower CP, BMS Tstat Bypass
Exhaust: Active DP, Berk Ceramic Delete