Removing and Installing Oxygen Sensor In Front of Catalytic Converter

246919 Removing and Installing Oxygen Sensor In Front of Catalytic Converter

Tools

Tools:

Preliminary work

Preliminary work for removing oxygen sensors in front of catalytic converter
1. Remove air cleaner housing.

Removing oxygen sensors in front of catalytic converter

Removing oxygen sensor in front of catalytic converter of cylinder bank 1-3

NOTE: Always expose oxygen sensor wire far enough for it to be able to turn when unscrewing the sensor.

Disconnect Plug Connection For Oxygen Sensor::

1. Disconnect plug connection in left of engine compartment for the oxygen sensor in front of catalytic converter. To do this, pull the black connector out of the holder first -2-.
2. Release blue cable of the oxygen sensor in front of catalytic converter from the cable holder.

Oxygen Sensor In Front Of Catalytic Converter:

3. Undo oxygen sensor using an open-ended wrench or open ring wrench (a/f 22) and screw it out by hand -arrow-.

Removing oxygen sensor in front of catalytic converter of cylinder bank 4-6

NOTE: Always expose oxygen sensor wire far enough for it to be able to turn when unscrewing the sensor.

Plug Connection For Oxygen Sensor:

1. Disconnect plug connection in right of engine compartment for the oxygen sensor in front of catalytic converter. To do this, pull the black connector out of the holder first -2-.
2. Release blue cable of the oxygen sensor in front of catalytic converter from the cable holder.

Oxygen Sensor In Front Of Catalytic Converter:

3. Undo oxygen sensor using an open-ended wrench or open ring wrench (a/f 22) and screw it out by hand -arrow-.

Installing oxygen sensors in front of catalytic converter

Installing oxygen sensor in front of catalytic converter of cylinder bank 1-3
1. Route the oxygen sensors so that the cable can be easily routed from the engine compartment side to the exhaust system.
2. Position the oxygen sensor by hand and screw in as far as possible.

Tightening Oxygen Sensor:

3. Tighten oxygen sensor with commercially available open ring wrench accessory for torque wrench. Open ring wrench angled NR.96-3 and torque wrench Torque wrench, signal-transmitting with changeover ratchet NR.90 and tighten to the specified tightening torque Tightening torque 41 ftlb. ±3.5 ftlb.
4. Route the blue oxygen sensor cable and secure it in the sheetmetal brackets, cable holders, or the cable guide (right side).
5. Connect plug connection (blue cable - black connector) and insert in the holder.

Installing oxygen sensor in front of catalytic converter of cylinder bank 4-6
1. Guide the oxygen sensors through so that the cable can be easily routed from the engine compartment side to the exhaust system.
2. Position the oxygen sensor by hand and screw in as far as possible.
3. Tighten oxygen sensor with commercially available open ring wrench accessory for torque wrench. Open ring wrench angled NR.96-3 and torque wrench Torque wrench, signal-transmitting with changeover ratchet NR.90 tighten Tightening torque 41 ftlb. ±3.5 ftlb.
4. Route the blue oxygen sensor cable and secure it in the sheetmetal brackets, cable holders, or the cable guide (right side).
5. Connect plug connection (blue cable - black connector) and insert in the holder.

Subsequent work

Subsequent work for installing oxygen sensors in front of catalytic converter
1. Install air cleaner housing.