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Steve
Steve, BMW Expert
Category: BMW
Satisfied Customers: 24107
Experience:  BMW Expert
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P0174 bank 2 Lean, 2007 e92 328xi, I tried fuel injector

Customer Question

P0174 bank 2 Lean
JA: What is the model/year of your BMW?
Customer: 2007 e92 328xi
JA: Are you fixing your 328xi yourself? What have you tried so far?
Customer: I tried fuel injector cleaner
JA: Has the vehicle turned into a gas hog? And how does it start -- same as usual?
Customer: cold starts are rough
JA: Anything else you want the mechanic to know before I connect you?
Customer: no that is only issue
Submitted: 10 months ago.
Category: BMW
Expert:  Steve replied 10 months ago.
Hello and welcome,

My name is ***** ***** it will be my pleasure to assist you today.
have you tried anything other than injector cleaner?
Customer: replied 10 months ago.
no
Expert:  Steve replied 10 months ago.
this is a lean code, it means the engine is getting too much air relative to fuel
the most common cause would be an intake air leak, failing airflow sensor or failing crankcase ventilation system. unlikely causes would be a bad temp sensor, o2 sensor, or low fuel pressure
all of the above will need to be checked to determine the cause
Please let me know if you have further questions. Please do not forget to click a positive rating as this is the only way I receive credit for my answer, thank you. Best wishes with your vehicle.