Heated Oxygen Sensor Replacement - Bank 1 Sensor 2. Cadillac STS 2009

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2009 🢒 STS 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Heated Oxygen Sensor Replacement - Bank 1 Sensor 2

Caution: Refer to Oxygen Sensor Caution in the Preface section.

Note:

•	Bank 1 on the LC3 engine is the right side of the engine while sitting in the driver seat.

•	Sensor 2 is the second sensor down stream from the engine towards the rear of the vehicle.

•	A special anti-seize compound is used on the oxygen sensor threads. New service sensors should already have the compound applied to the threads. Coat the threads of a reused sensor with anti-seize compound P/N 5613695 or equivalent.

Remove the engine sight shield. Refer to Intake Manifold Sight Shield Replacement.
Remove the front air inlet housing panel. Refer to Air Inlet Housing Front Panel Replacement.
Disconnect the oxygen sensor electrical connector (2) from the engine wiring harness connector at the rear of the right head.
Note the wire routing and attachment points for reassembly.
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
Remove oxygen sensor from the exhaust pipe.

Caution: Refer to Fastener Caution in the Preface section.

Install the heated oxygen sensor (HO2S) in the exhaust pipe and tighten to 42 N·m (31 lb ft).
Route and attach the wiring as noted during disassembly.
Lower the vehicle.
Connect the oxygen sensor electrical connector (2) to the engine wiring harness connector at the rear of the right head.
Install the front air inlet housing panel. Refer to Air Inlet Housing Front Panel Replacement.
Install the engine sight shield. Refer to Intake Manifold Sight Shield Replacement.