PO171 & PO174 on 2001 BMW 330i

What causes those code to trigger? PO171 & PO174. Thanks all

by in Mesa, AZ on March 10, 2010
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2 answers
ANSWER by , March 10, 2010
Crankcase Breather Leaking Exhaust System Dirty Fuel Injectors Restricted Fuel Injectors Insufficient Fuel Pressure Leaking Intake Manifold Defective Mass Air Flow (MAF) Sensor
ANSWER by , March 10, 2010
Hi, you can find out about the p0171 and p0174 dtc's here: http://repairpal.com/OBD-II-Code-P0171-and-P0174