What are the oxygen sensors on a Subaru Outback?
Your Outback has at least two oxygen sensors, one before and after the catalytic converter. Among the many jobs that oxygen sensors have is they have to measure the emissions levels coming in and out of the converter.
Why is my OBDII not working on my Subaru Outback?
WIth the Outback, OBDII P0420 is often caused by a bad oxygen sensor, but there can be other causes as well. Jumping straight to replacing the O2 sensor can cost you time and money. P0420 is a very common trouble code. This code number references a number that is given to you when you plug your Subaru Outback into a OBDII scanner.
When to reset the ECU after changing an O2 sensor?
Sometimes an O2 sensor fails, and you need to replace it. Once you’ve replaced your vehicle’s O2 sensor, you’ll need to reset the ECU so it can properly gather information from the new O2 sensor.
What causes a Subaru Outback to throw a P0420 code?
Outback Timing – If your Outback is misfiring or the exhaust timing is off, this can affect the gasses that are actually going to the O2 sensors enough to cause the P0420 code to register. Exhaust Leak – If there’s a noticeable exhaust leak coming from the vehicle it can change what the O2 sensors register enough to throw the P0420 code.
What happens if the oxygen sensor goes bad on a Subaru Outback?
When an O2 (oxygen) sensor go bad, it’ll cause your Subaru Outback ‘s engine to run less efficiently. Your Outback can exhibit symptoms when the Oxygen sensor has gone bad. Or, it may exhibit none at all. Often enough, the only sign of the problem at all is the service engine soon light being on.
How do you remove a sensor from an outback?
Unplug the sensor’s electrical connector. Lift the front of the Outback with a floor jack and support it with two jack stands. Put on your goggles, crawl under the vehicle and remove the engine undercover with a ratchet, short ratchet extension and socket.
Sometimes an O2 sensor fails, and you need to replace it. Once you’ve replaced your vehicle’s O2 sensor, you’ll need to reset the ECU so it can properly gather information from the new O2 sensor.
Why does the Check Engine light come on on an outback?
Oxygen sensors can change the way that your Outback’s engine runs. Most of the time, the check engine light will come on. It’s a good thing that the check engine light would come on, as there is more than one oxygen sensor, and they can be difficult to get to and test.