A built-in BMW, self diagnostic code gives the benefit of troubleshooting a failure car component, the method to retrieve the faulty codes after Check Engine light turns on. This method helps car lovers to pin point the problem and replace the defecting component quickly and cost effectively. It works on models that have same instruments and LED's layout.
Below here is the code table to interpret the meaning:
http://pelicanparts.com/bmw/techarticles/Mult-Code_Reading/Mult-Code_Reading.htm
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