BMW Fault Codes List

Common BMW Fault Codes

P0101 – Mass Air Flow Sensor
P0128 – Coolant Temperature Below Thermostat
P0171 – System Too Lean
P0299 – Turbo Underboost
P0300 – Random Misfire
P0401 – EGR Flow Insufficient
P0420 – Catalyst Efficiency Below Threshold

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