Exchange Exhaust Sensors on a Nissan
The O2 sensors (O2S) on your Nissan scanner the O2 content of the exhaust Gauze stream forthcoming absent of the combustion chambers. The machine uses this and other sensors' enlightenment to calculate the beyond compare air/fuel concoction at any addicted day for beyond compare engine performance. On the other hand, Oxygen sensors wear gone, affecting engine efficiency. Depending on your specific mannequin, your Nissan may come equipped with two or three O2 sensors. Practise undeniable to establish the one(s) you duty to alter before dawning the activity.
Instructions
Removing the Oxygen Sensor(s)
1. Stadium your motorcar in a constant surface.
2. Derivation the engine and let it unused for approximately 15 minutes or ride your Nissan for approximately 15 to 20 miles prior to replacing the sensor(s). This Testament bring the engine and exhaust action to operating temperature and ease you avoid using Exorbitant draft to remove the sensor(s), which may damage the exhaust tube threads.
3. Disconnect the ground (coal) battery cable using a wrench.
Connect the ground (black) battery cable using the wrench.15. Start the engine and make sure the Check Engine Light is off. Otherwise, you will need to erase any Diagnostic Trouble Codes (DTC's) stored in the computer's memory using a scan tool. The upstream sensor threads either to the exhaust manifold or down exhaust pipe, close to the manifold, and usually you do not have to lift the car to replace it.
5. Put on your goggles if you are replacing a downstream oxygen sensor. Rust particles may fall and injure your eyes as you work underneath your vehicle. Also, wear long sleeves, if necessary, since you will be working around a hot exhaust system.
6. Unplug the oxygen sensor electrical connector. On some Nissan models, you will have to remove the passenger seat and look for the connector under the carpet, to disconnect the downstream sensor.
7. Unscrew the sensor using a box-end wrench or oxygen sensor socket, if your Nissan model has the screw-in type. With flange type sensors, unscrew the two hold-down nuts or bolts suing a wrench or ratchet and socket.
8. Remove the oxygen sensor from the vehicle. Flange type sensors come equipped with a gasket. Make sure to remove it as well.
Installing the Oxygen Sensor(s)
9. Coat lightly the threads of the new sensor (screw-in type) with anti-seize compound, if your new sensor does not come with it already. This will help your remove the sensor next time you need to replace it. Be careful not to let the compound come in contact with the sensor's tip to avoid damage to the active elements inside.
10. Place the new sensor in place and start threading the sensor or mounting nuts/bolts by hand. If you are replacing a flange type, use a new gasket.
11. Tighten the sensor using the box-end wrench, oxygen sensor socket (screw-in type), wrench or ratchet and socket (flange type).
12. Plug the oxygen sensor electrical connector. Replace the carpet and passenger seat, if you had to remove them.
13. Lower the vehicle, if you had to raise it.
14.4. Uplift the front of your Nissan using a floor jack and aid it on jack stands, provided you are replacing a downstream oxygen sensor. This sensor is located at the outlet pipe of the catalytic converter, under the vehicle.
