what po170 and po 173 means on a 98 bmw 740i

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Reynaldo · Answer 1 · 2018-10-05T05:26:23+0000

P0170 Fuel trim malfunction bank 1

P0173 Fuel trim malfunction bank 2

Do a MAF (mass airflow) cleaning, using a approved MAF cleaner solution, also look for any vacuum leaks especially at the brake booster hose.