Stratus Sedan L4-2.4L VIN X (2003)
Oxygen Sensor: Service and Repair
Downstream O2 Sensor
Fig.29 O2 Sensor Downstream 2/1 4 Cylinder
REMOVAL - Downstream 1/2
The O2S is located in the side of the catalytic converter.
WARNING: THE EXHAUST MANIFOLD, EXHAUST PIPES AND CATALYTIC CONVERTER BECOME VERY HOT DURING
ENGINE OPERATION. ALLOW ENGINE TO COOL BEFORE REMOVING OXYGEN SENSOR.
1. Remove the negative battery cable.
2. Raise and support the vehicle.
3. Disconnect the wire connector from the O2S.
CAUTION: When disconnecting the sensor electrical connector, do not pull directly on wire going into sensor.
4. Remove the O2S. Snap-On oxygen sensor wrench (number YA 8875) may be used for removal and installation.
INSTALLATION - Downstream 1/2
The O2S are located in the side of the catalytic converter.
1. After removing the sensor, the exhaust manifold threads must be cleaned with an 18 mm X 1.5 + 6E tap. If reusing the original sensor, coat the
sensor threads with an anti-seize compound such as Loctite 771-64 or equivalent. New sensors have compound on the threads and do not require
an additional coating.
2. Install the O2S. Tighten to 28 Nm (20 ft. lbs.) torque.
3. Connect the O2S wire connector.
4. Lower the vehicle.
5. Install the negative battery cable.
