BMW Code P0174

Question

What is the best place to start if this code is showing. It seems like alot of things to fix and replace? Could it be a bad batch of Gas?

Possible causes

• Intake air leaks
• Faulty front heated oxygen sensor
• Ignition misfiring
• Faulty fuel injectors
• Exhaust gas leaks
• Incorrect fuel pressure
• Lack of fuel
• Faulty Mass Air Flow (MAF) sensor
• Incorrect Positive Crankcase Ventilation (PCV) hose connection

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Answer 1

P0174 Fuel trim lean Bank 2

Batch bad of fuel would cause both banks to go lean. The best place to start is listen for any vacuum leaks that can cause the lean condition.