O2 Sensor 2011 Subaru Forester

[Tom Gravgaard]

Hello Everyone. Hoping to get some help on my 2011 Subaru Forester. My check engine light is on and ODB error is P0171. I looked online and i read it could be the O2 Sensor. I did a live data test on ODB and I see that O2B1S1(V) is at 2.204 and O2B1S2 is at 0.0. I am not sure if this makes a difference, but the sensor S1 seems to be in worse shape than the S2 sensor. Here is a link to the images of the sensors and connectors (https://postimg.cc/gallery/8WzzkST). Can someone let me know which one needs to be replaced or if you think the issue is something else besides the O2 sensor. If so please let me know what to check for. Just want to make sure I get the right connector. Thanks for your help.

• This topic was modified 3 years, 6 months ago by Tom Gravgaard.

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[Tom Gravgaard]

Sorry here is the link to the images. https://postimg.cc/gallery/8WzzkST

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