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Home >> Infiniti >> 2014 >> Q50 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0171 To P0463 (Except Hybrid) >> DTC P0171,: P0174 Fuel Injection System Function >> DTC Description >> Possible Cause >> P0171

Possible Cause: P0171

Intake air leaks
A/F sensor 1
Fuel injector
Exhaust gas leaks
Incorrect fuel pressure
Lack of fuel
Mass air flow sensor
Incorrect PCV hose connection

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