![]() ![]() The BMW X3 began production in 2003, four-years after the introduction of the X5 which was BMW's first ever crossover or "sport-utility" vehicle. Enter a BMW fault code (P or hex), complete the Captcha, and click "Search". Your OBD system detects faults in your car and displays a trouble code that tells you and your mechanic what needs service in BMW Codes Trouble Code Fault Location Probable Cause P0171: System too lean, bank 1: Intake/exhaust leak, AIR system, MAFNAF sensor, fuel pressure/pump, injector(s), HO2S. 3 Decimal 1 DME Fault 3 Fuel Pump Relay EKP 4 Idle Speed This can mean your BMW engine is actually running rich and there's too much fuel for the given amount of air. If you use a generic OBD2 scanner, you will get generic fault codes such as P0720 or P0732, which don’t provide enough details on the cause of the problem.
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