Subaru Forester Problems

Check Engine Light Due to Failed Front O2 Sensor on Subaru Forester

Problem Description and Possible Solution

The front oxygen (air fuel ratio) sensor element may develop a crack, causing the Check Engine Light to illuminate. Subaru has recalled certain models to replace sensors that may fail. The Subaru service program number is WXW-80, this is not a government mandated recall.


(179 people reported this problem)

Subaru Forester Vehicles With This Problem

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Average mileage: 132,164 (35,000–389,000)
14 model years affected: 1998, 2000, 2001, 2002, more2003, 2004, 2005, 2006, 2007, 2009, 2010, 2011, 2012, 2013
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Viewing 1-20 of 61 comments
My Check engine light came on so I took it to a mechanic. They ran a diagnostic test on my Subaru and it reported that there was an issue with the O2 Bank 1 Sensor 1. I have not yet fixed it as I am researching the best way to take care of the problem (this is how I found the recall).
the check engine light is on and it hesitates,i need to take my foot off gas and lowly climb speed,and while stopped at light etc it struggles to remain at a steady idle and often will stall, ive replaced both sensors twice, i have owned 3 subarus and if this prob isnt fixed a new wrx is NOT in the near future as planned where do i go for this problem, i just need the sensor i can install
Cruise control light blinks and check engine light stays on, had sensor reset and turned off cruise control was good for few days and happened again. Car is running fine, shop said new catalitic coverter is $850, just want to be sure it needs this and not a new sensor.
I have front O2 sensor (Sensor # 1) failing and check eng. light. Diagnostic shows the #1 O2 Sensor failing. Problem has not yet been fixed. It is a 2004 Subaru Forester X2.5
This is the second time I have had to replace the oxygen sensor. First time was at 65,000. I bought my 2002 Subaru Forester new and maintained all the required maintenance needed to keep it in excellent condition.
Check engine stays on, OBD2 says o2 sensor & Idle control valve. replaced both, problem remains. Car surges, has trouble maintaining steady idle.
The engine warning light came on unexpectedly while driving including the cruise light and kept blinking. I brought it to the dealer where I had purchased the car Don's Ford Subaru and they said it was the oxigen sensor at fault. They replaced it and the total cost with tax came out to $480.89. I had asked why this happened with such low miles and they said when a car gets older this can happen and that this vehicle has two sensors and the other one is ok.
Engine light, Traction Control, and Cruise Control light-flashing came on . Had O2 sensor changed per the fault code. 10 miles later the lights came back on. 250.00 wasted. Now what???
2002 Subaru Forester. O2 sensor causing check engine light to come on. Now could be linked to transmission lag-?
I've had this happen twice now, only two years apart! The dealership said "oh, things just wear-out sometimes." It happened the first time with about 65k and the second time 75k.
Same problem; all kinds of repairs done to exhaust. Just now learning of recall. Not yet resolved;engine light still illuminated.
02 sensor, cruise control light and check engine light came on after we had the head gasket fixed. Getting quotes on the price but initially told price would be $250+ from a local parts guy...hoping we can find it cheaper from another dealer.