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Wheel Bearings & Hub Assemblies Subaru CV Axles

How to tell if you have a bad Oxygen Sensor, and Why it went Bad... The Oxygen sensor sends a signal to your Subaru Engine Control Computer. Depending on the signal that your computer received, it will allow more (rich) or less (lean) fuel to keep your air-fuel ratio balanced at 14.7:1. Other conditions may affect this ratio. Causes of a Rich Condition  Causes of a Lean Condition Plugged air filter Faulty ECU Faulty air mass meter Faulty MAP sensor Faulty idle control valve Faulty fuel pressure regulator Faulty fuel injector(s) Restricted fuel return line Plugged air filter Faulty ignition wire(s) Ignition timing Faulty oxygen sensor Faulty air fuel sensor Faulty PCV Faulty EVAP Associated wiring Engine coolant temperautre Vacuum leak Faulty ECU Faulty air mass meter Faulty air flow meter Faulty MAP sensor Faulty idle control valve Faulty fuel pressure regulator Faulty fuel pump  Restricted fuel filter (screen) Faulty fuel injector(s) Faulty PCV Associated wiring Exhaust gas leak Faulty Oxygen Sensor Faulty air fuel sensor Ignition timing EGR valve

MIBearings LLC - Subaru O2 Sensors -    Last Modified Thursday August 06, 2009 Sitemap