Removal

4.0L

DOWNSTREAM OXYGEN SENSOR (1/2) & UPSTREAM OXYGEN SENSOR (1/1)






WARNING: THE EXHAUST MANIFOLD, EXHAUST PIPES AND CATALYTIC CONVERTER(S) BECOME VERY HOT DURING ENGINE OPERATION. ALLOW ENGINE TO COOL BEFORE REMOVING OXYGEN SENSOR. FAILURE TO ALLOW ENGINE TO COOL BEFORE REMOVAL MAY RESULT IN PERSONAL INJURY CAUSED BY BURNS.

CAUTION: When disconnecting sensor electrical connector, do not pull directly on wires going into oxygen sensor (O2S). Damage to the oxygen sensor may occur.

NOTE: Use an O2S removal tool for this procedure.

1. Raise and support vehicle.
2. Disconnect O2S wire harness mounting clips from engine or body, if equipped.
3. Disconnect O2S pigtail harness from engine wiring harness (1).
4. Remove the O2S (5) from the catalytic converter (4).
5. Disconnect O2S pigtail harness from engine wiring harness (2).
6. Remove the O2S (3) from the catalytic converter (4).


DOWNSTREAM OXYGEN SENSOR (2/2) & UPSTREAM OXYGEN SENSOR (2/1)






WARNING: THE EXHAUST MANIFOLD, EXHAUST PIPES AND CATALYTIC CONVERTER(S) BECOME VERY HOT DURING ENGINE OPERATION. ALLOW ENGINE TO COOL BEFORE REMOVING OXYGEN SENSOR. FAILURE TO ALLOW ENGINE TO COOL BEFORE REMOVAL MAY RESULT IN PERSONAL INJURY CAUSED BY BURNS.

CAUTION: When disconnecting sensor electrical connector, do not pull directly on wires going into oxygen sensor (O2S). Damage to the oxygen sensor may occur.

NOTE: Use an O2S removal tool for this procedure.

1. Raise and support vehicle.
2. Disconnect O2S wire harness mounting clips from engine or body, if equipped.
3. Disconnect O2S pigtail harness from engine wiring harness (1).
4. Remove the O2S (2) from the catalytic converter (4).
5. Disconnect O2S pigtail harness from engine wiring harness (5).
6. Remove the O2S (3) from the catalytic converter (4).