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Originally Posted by imola4.8isWA
how do these codes differ from the bmw fault codes posted on this site. and how are we able to read the actual bmw codes??
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Well most go to the dealer when there is a SES light on, the dealer uses their diagnostic tools to read what the codes are and diagnose and fix the problem accordingly. But since I modify a lot of my vehicles I bought I have a diagnostic program that is on my laptop, with a connector cable to the diagnostic port. Thus I can read the acutal codes and then use the manual to find out what the codes are. If you just want a simple handheld Actron OBD 2 Auto Scanner is decent, or you can go to Autozone and they will read your codes for you. But if you are in warranty, which I believe you are just hand all problems over to the dealer. My warranty is voided on all drivetrain components due to my "enhancements", so I prefer to see what the problem is first before deciding, whether to bring it to the dealer.