OEM 2005 Buick Terraza Oxygen Sensor

2005 Buick Terraza Parts Questions & Experts Answers

• Q: How to replace the Heated Oxygen Sensor (HO2S) at Position 2 on 2005 Buick Terraza?

  A: The J 39194-B Heated Oxygen Sensor Wrench (J 39194-B) supports both curved and threaded sensor removal and installation at position 2. Caring handling of the oxygen sensor requires attention because exposure to grease, dirt and cleaning solvents may negatively affect sensor functionality. Maintenance of the sensor operation requires that you do not separate the pigtail between HO2S and O2S. The oxygen sensor requires replacement because all three components of the pigtail wiring and connector and terminal display damage. The sensor wires along with vehicle leads must be maintained with a smooth curve and the oxygen sensor ground wire should not be detached because poor engine performance may occur. Every component of the vehicle harness connector should retain its proper sealing status to stop water entry while Packard's Crimp and Splice Seals Terminal Repair Kit serves as the preferred repair tool instead of traditional soldering methods. It is essential to wait until the engine temperature reaches 48°C (120°F) before starting heated oxygen sensor removal to protect the thread from damage. Start by shutting down the vehicle engine and elevating the car before removing the sensor harness connector. Use J 39194-B to reverse the heated oxygen sensor carefully. Apply anti-seize compound GM P/N 5613695 or its equivalent to the threads of the heated oxygen sensor before reinstalling because this special compound helps sensor removal in future procedures. Construct an installation of the HO2S 2 while applying a torque of 41 N.m (30 lb ft). After that attach the sensor electrical connector then lower the vehicle.