Sensor, Oxygen: Installation: 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.
- If reinstalling the original oxygen sensor, coat the sensor threads with an anti-seize compound such as Loctite 771- 64 or equivalent. New sensors have compound on the threads and do not require an additional coating.
Do Not add any additional anti-seize compound to the threads of a new oxygen sensor.
- Install the downstream oxygen sensor and tighten to 45 N.m (33 ft. lbs.).
- Engage the downstream oxygen sensor wire harness to the retainers (2).
- Lower the vehicle.
- Install the upstream stream oxygen sensor and tighten to 45 N.m (33 ft. lbs.).CAUTION:
Never apply any type of grease to the oxygen sensor electrical connector, or attempt any repair of the sensor wiring harness.
- If installing the downstream oxygen sensor, connect the heated oxygen sensor wire harness connector (2).
- If installing the upstream oxygen sensor, connect the heated oxygen sensor wire harness connector (1).
- Engage the oxygen sensor wire harness from retainers (3).
- Connect the negative battery cable and tighten nut to 5 N.m (45 in. lbs.).