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Ich bin der Modifikator
3,323 Posts
i need some explantion of codes

Fuel Control (Bank 1 Sensor 1)

andP0170 Fuel Trim Malfunction (Bank 1)

need help on understanding so can be fixed
Pre- Cat o2 Sensors.......Everything I've searched came up pre-cat o2 sensors,

Before you replace them, make sure your car is well tuned, plugs, air & fuel filters are all up to date........check the MAF Sensor Boot for cracks & vacuum leaks, also clean the MAF Sensor......with a Mass Air Sensor cleaner sold @ most auto parts stores......

OBD Codes - bimmerfest - BMW Forums

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