Oxygen (O2) & Sub-Oxygen Sensors: Removal
- Turn engine off. Disconnect O2 sensor electrical connector. Remove 2 mounting bolts/nuts and remove O2 sensor from manifold/pipe. Some O2 and sub-oxygen sensors screw into exhaust manifold or header pipe in front of converter.
- When removing an O2 sensor that will be reused, protect its permanent pigtail from damage by using proper socket wrench (if required). After removal, ensure sensor tip is free of contaminants. Replace sensor as required. DO NOT use cleaning solvents on sensor tip. Installation Before installing O2 sensor, apply anti-seize compound or silicone to O2 sensor threads or to mounting bolt threads. Screw O2 sensor into exhaust, or install gasket and O2 sensor using mounting bolts.