OEM 2005 Buick Century Oxygen Sensor

2005 Buick Century Parts Questions & Experts Answers

• Q: How to Replace a Heated Oxygen Sensor (HO2S) Safely and Effectively on 2005 Buick Century?

  A: Start sensor replacement by disconnecting the ho2s electrical connector. Wrenching the heated Oxygen Sensor might prove difficult when your engine temperature falls under 48°c (120°F), yet using too much force can cause damage to Exhaust Manifold or Exhaust Pipe threads. Use the heated Oxygen Sensor wrench (J 39194-B) to remove the sensor from its installation position. A special anti-seize compound (P/N 12377953) or equivalent should be used to coat heated Oxygen Sensor/catalyst monitor threads before installation because a compound with glass beads and graphite is optimal for future sensor removal operations. Manufacturers incorporate anti-seize compound as part of the protective material applied to new or service sensors. Reinstalling any sensor requires application of anti-seize compound to the threads so the sensor can be easily removed in future maintenance. The heated Oxygen Sensor (HO2S) installation requires a heated Oxygen Sensor wrench (J 39194-B) to reach a torque specification of 42 n.m (31 lb ft). Finally, reconnect the ho2s electrical connector.