Sensor, Oxygen: Removal: 3.2L: Front

Courtesy of CHRYSLER GROUP, LLC

The engine is equipped with four heated Oxygen (O2) sensors:

• The rear upstream oxygen sensor is referred to as the 1/1 sensor.
• The rear downstream oxygen sensor is referred to as the 1/2 sensor.
• The front upstream oxygen sensor is referred to as the 2/1 sensor.
• The front downstream oxygen sensor is referred to as the 2/2 sensor.

1. Disconnect and isolate the negative battery cable. If equipped with an Intelligent Battery Sensor (IBS), disconnect the IBS connector first before disconnecting the negative battery cable.
   CAUTION:

   When disconnecting the oxygen sensor electrical connector, do not pull directly on the wire going into the sensor. The sensor wiring can be damaged resulting in sensor failure.

2. Disconnect the heated O2 sensor wire harness connectors (1).
3. Remove the up stream O2 sensor (2).
4. Raise the vehicle and support the vehicle. Refer to HOISTING, STANDARD PROCEDURE .
5. Remove the belly pan. Refer to BELLY PAN, REMOVAL .

   Courtesy of CHRYSLER GROUP, LLC

6. Disconnect the heated O2 sensor electrical connector (2).
7. Remove the down stream O2 sensor (3).
8. Clean the exhaust pipe threads using an appropriate tap.