Upstream Heated Oxygen Sensor: Installation
WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue and 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Ensure that the correct replacement HO2S is used. The engine HO2S 1 and the post-converter HO2S 2 are both 6.6-watt Denso sensors. Due to differences in the pigtail length, the sensors use different connectors and are not interchangeable.
- A special anti-seize compound is used on the oxygen sensor threads. The compound consists of a liquid graphite and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New sensors will have the compound applied to the threads.
- If a sensor is removed and is to be reinstalled, the threads must have an anti-seize compound applied before installation. Coat the threads of the HO2S with anti-seize compound, if necessary. Install the HO2S and tighten to specification. See TORQUE SPECIFICATIONS . Connect HO2S harness connector.
Install the bank 1 sensor 1 in the rear exhaust manifold. Tighten the bank 1 sensor 1 to specification. See TORQUE SPECIFICATIONS . Connect the bank 1 sensor 1 harness connector. Raise the frame. Install the 4 rear frame bolts. Tighten the frame bolts to specification. Lower the vehicle.
Install the bank 2 sensor 1 in the front exhaust manifold. Tighten the bank 2 sensor 1 to specification. See TORQUE SPECIFICATIONS . Connect the bank 2 sensor 1 harness connector. Install front splash shield. Lower the vehicle.