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PO171 & PO174

(2001 BMW 330i)
in Mesa, AZ on March 10, 2010
What causes those code to trigger? PO171 & PO174. Thanks all
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Popular Answer
on 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
on March 10, 2010
Hi, you can find out about the p0171 and p0174 dtc's here:
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