Question

What does the engine code P0174 means for a 1999 Infiniti V6?

Answer 1

P0174 Infiniti - Fuel Injection System Too Lean Bank 2

means bank 2 is too lean, too much air and not enough fuel. Check for intake leaks first than clean mass air flow sensor with mass air flow sensor cleaner are the easiest things to check and do first

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