DIY Reference - Common Codes with Confirmed Fixes

[Theodore]

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2B0D or 002B0D - Idle speed control valve monitor bank - Replaced Idle Control Valve BMW Part # 13417838024 (Special Note: BMW has an extended 10 year/100,000 mile from new warranty on this part)
2B59 - Coolant thermostat monitoring - Replaced Coolant Temperature Sensor BMW Part # 13621433076
27C5 or 0027C5 - Catalytic conversion LSU - Replaced Air Pump Suction Hose BMW Part # 11727838504
27E3 - INDEX_211_INJ - Replaced Brake Vacuum Line with Pressure Sensor - BMW Part # 34302283605
27E4 - INDEX_212_INJ - Replaced Brake Vacuum Line with Pressure Sensor - BMW Part # 34302283605
2722 or 002722 - Fuel Pressure Sensor, Signal - Replaced Low Pressure Fuel Line Sensor - BMW Part # 13537614317
2739 or 002739 - Brain form-light test switch: signal - Replaced Air Pump Suction Hose BMW Part # 11727838504
274B or P2629 - O2 Sensor Pumping Current Trim Circuit/Open (Bank 2 Sensor 1) - Replaced Pre-Cat O2 sensor driver's side - BMW Part # 11787539125 (or Bosch 17039)
6059 or 006059 - Wheel sensor error undefined - Replaced TPMS sensor with failing battery BMW Part # (varies based on model year, color of valve stems, etc.)
9E51 or 009E51- SMFA Error motor/Error motor SNV - Replaced driver's seat motor BMW Part # 67316973600
P0175 - System Too Rich (Bank 2) - Replaced Low Pressure Fuel Line Sensor - BMW Part # 13537614317
P0128 - Increased Emissions - Replaced Thermostat - BMW Part # 11537836155
P157F - Unknown Diagnostic Trouble Code - Replaced Throttle Actuator - BMW Part # 13627838085
P2629 or 274B - O2 Sensor Pumping Current Trim Circuit/Open (Bank 2 Sensor 1) - Replaced Pre-Cat O2 sensor driver's side - BMW Part # 11787539125 (or Bosch 17039)


Post known error codes with fixes you've experienced to add to the list.