By YOUCANIC on May 15, 2019
In this guide, you will learn how to replace Honda O2 sensor. Helpful if you are trying to change oxygen sensor on a Honda Accord, Civic, Pilot, Insight, CR-V, Odyssey.
Here we replace the upstream (sensor 1) oxygen sensor which is accessed from the top of the engine. The same procedure is used to replace the downstream oxygen sensor but that sensor is easier to access from the bottom of the engine.
Even though oxygen sensors are not particularly maintenance items, on modern Honda vehicles they often start to fail around the 100,000 to 150,000-mile mark. Once the oxygen sensor on your Honda fails, you will notice the check engine light on plus other symptoms.
When your Honda oxygen sensor fails you will decrease in performance such as:
Use an OBD-II scanner to read the codes via the OBD-II port under the dashboard to confirm the oxygen sensor is defective.
Recommended: Genuine Honda Oxygen Sensor
The good news is that replacing the oxygen sensor on your Honda is easy. It takes about 1 to 2 hours depending on your skill level.
Oxygen sensor are replaced when they fail. In many cars, oxygen sensors fail around 100,000 to 150,000-mile mark.
Yes. P0420 code means that the catalytic converter is operating below threshold. This code comes up when the catalytic converter is bad or the oxygen sensor is defective.
Yes you can. You may have to splice wires and will need to connect all the 4 wires correctly. The new connections tend to corrode and cause problems down the line. Make sure to insulate the wires properly.
Most common Honda oxygen sensor thread is: 18 mm x 1.5 mm
Check engine light and poor fuel econommy are the most common.
7/8" or 22 mm socket.
33 ft - lb
No. In most contries it is not legal to install an oxygen sensor spacer.
The typical color on OEM Honda O2 sensor.
Ground will be green or gray.
The signal is white or black.