Oxygen Sensor: Service and Repair

Exhaust Oxygen Sensor (02):

CAUTION:

^ The Oxygen sensor uses a permanently attached pigtail and connector. This pigtail should not be removed from the oxygen sensor. Damage or removal of the pigtail or connector could affect proper operation of the oxygen sensor.
^ Take care when handling the oxygen sensor. The in-line electrical connector and louvered end must be kept free off grease, dirt or other contaminants. Also, avoid using cleaning solvents of any type. DO NOT drop or roughly handle the oxygen sensor.
^ The following procedure should be performed with engine temperature over 120°F otherwise the oxygen sensor may be difficult to remove.



REMOVAL:

1. Disconnect the negative battery cable.
2. Remove the engine coolant reservoir (DO NOT disconnect hoses) and set to the side of the engine compartment.
3. Remove the engine torque strut mounting bolt, and move the engine forward.
4. Disconnect the oxygen sensor electrical connector.
5. Carefully back out the oxygen sensor using tool J 38756 or equivalent.

INSTALLATION:

NOTE: A special anti-seize compound is used on the oxygen sensor threads. The compound consists of a liquid graphite and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or service sensors will already have the compound applied to the threads. If a sensor is removed from an engine, and, if for any reason it is to be reinstalled, the threads must have anti-seize compound applied before reinstallation.

1. Coat the threads of the oxygen sensor with anti-seize compound P/N 5613695, or equivalent if necessary.
2. Install the sensor in the engine, and tighten to 41 Nm (30 lb.ft).
3. Connect the electrical connector.
4. Install the engine torque strut and bolt.
5. Install the engine coolant reservoir.
6. Connect the negative battery cable.

NOTE: The system has a learning ability which allows it to make corrections for minor variations in the fuel system to improve driveability. When the battery is disconnected the computer's memory is cleared and the learning process has to begin all over again. A change may be noticed in the driving performance of the vehicle. To reset the vehicles learning ability, make sure the engine is at operating temperature and operate the vehicle at part throttle, moderate acceleration, and idle conditions, until normal performance returns.