Sensor, Oxygen: Removal: 1.4L
WARNING: This page is about a different car, the 2015 Fiat 500. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The engine is equipped with two heated oxygen sensors:
- The upstream oxygen sensor (1) is referred to as the 1/1 sensor.
- The downstream oxygen sensor (2) is referred to as the 1/2 sensor.
WARNING:
The exhaust pipes and catalytic converter become very hot during engine operation. Allow the engine to cool before removing the oxygen sensor.
- Disconnect and isolate 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.
- Disengage the oxygen sensor wire harness from retainers (3).
- If removing the upstream oxygen sensor, disconnect the heated oxygen sensor wire harness connector (1).
- If removing the downstream oxygen sensor, disconnect the heated oxygen sensor wire harness connector (2).
- Remove the upstream oxygen sensor (1).
- If removing the downstream oxygen sensor, raise and support the vehicle. Refer to HOISTING .
- Disengage the downstream oxygen sensor wire harness from the retainers (2).
- Remove the downstream oxygen sensor (1).
- Clean the exhaust pipe threads using an appropriate tap.