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
Black 08 n54 135i Alpina AT 71k
Engine: JB4 e40/93, BMS Tstat, AFE DCI, VRSF FMIC 5"(On Deck)
Exhaust: Active DP, n55 Mids (Next), Berk Ceramic Delete
Exterior: Cree LED AE, Matte Kidney, Ambergone, Tint Front 50%/2%/0% Rear + Taillights
Tires: Nitto 555 265/35, Nitto Invo 235/40