Removal & Installation (Civic)

O2 sensor is mounted in exhaust manifold above exhaust pipe flange. Sensor 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 specification.