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Home >> Honda >> 1991 >> Civic EX, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul >> Fuel System >> Oxygen (O2) Sensor >> Removal & Installation
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Removal & Installation

O2 sensor is mounted in exhaust pipe just below exhaust header and is equipped with a permanent pigtail which must be protected from damage when sensor is removed. Ensure sensor is free of contaminants; avoid using cleaning solvents of any type. Sensor may be difficult to remove when engine temperature is less than 120°F (49°C). Always use anti-seize compound on threads prior to installation. Tighten sensor to 33 ft. lbs. (45 N.m).