2001 BMW 330i Q&A

2001 BMW 330i Question: PO171 & PO174

What causes those code to trigger? PO171 & PO174. Thanks all -
Answer 1
Crankcase Breather Leaking Exhaust System Dirty Fuel Injectors Restricted Fuel Injectors Insufficient Fuel Pressure Leaking Intake Manifold Defective Mass Air Flow (MAF) Sensor -
Answer 2
Hi, you can find out about the p0171 and p0174 dtc's here: http://repairpal.com/OBD-II-Code-P0171-and-P0174 -