P0172 Code – Fuel Trim System Rich Bank 1

Code P0172 Possible Causes
Incorrect Fuel Pressure
Intake Air Leaks
Positive Crankcase Ventilation PCV Hose Leaks
Exhaust gas leaks
Faulty front heated oxygen sensor
Faulty fuel injectors
Faulty Mass Air Flow MAF sensor
Ignition misfiring
Incorrect fuel pressure

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