OEM 2003 Cadillac Seville Oxygen Sensor

2003 Cadillac Seville Parts Questions & Experts Answers

• Q: How to replace the Bank 1 Sensor 1 Heated Oxygen Sensor (HO2S) on 2003 Cadillac Seville?

  A: Perform bank 1 sensor 1 heated Oxygen Sensor (HO2S) replacement when the engine temperature exceeds 48°c (120°F) because it helps with sensor removal. Special anti-seize compound should be applied to the threads of the Oxygen Sensor before installation. Engineers should use anti-seize compound p/n 5613695 or its equivalent to coat all reused sensors. The first step involves lifting and supporting the vehicle before supporting the powertrain frame at the rear section and unfastening its four rear frame bolts. Lower the frame measurement to 73.2 mm (3 inches) before disconnecting the rear Oxygen Sensor electrical connector in order to safely replace the sensor from the Exhaust Manifold. Insert the rear Oxygen Sensor into the rear Exhaust Manifold then secure it using torque of 41 n.m (30 lb ft). Reconnect the rear Oxygen Sensor connector after you have raised the frame and reinstall the four rear frame bolts with settings at 100 n.m (74 lb ft). Finally lower the vehicle.