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.
Check Engine Light Due to Failed Front O2 Sensor on Subaru Outback
Average mileage: 89,165 (5,700–200,000)
12 people reported this problem
9 people shared problem details
2007 Subaru Outback109,245Visitor
Yesterday I changed all four disc brakes will new slotted disks and ceramic pads. The check engine light, anti skid off light are on and the cruise light flashes. I ran the code and got P1155, reset and it repeated. Could the o2 sensor been disturbed when I jacked up the car?
2007 Subaru Outback54,000Visitor
engine light on due to O2 sensor defect and replaced a new sensor at the dealer.
2015 Subaru Outback5,996Visitor
Twice in one week check engine light on, solid, flashing cruise control and x mode warning signs
2004 Subaru Outback146,000Visitor
My 2004 Subaru Outback H6 sedan has this issue.
2015 Subaru Outback5,700Visitor
check engine light on. Subaru has a recall program on it, or so I have read on this page
2003 Subaru Outback117,000Visitor
Just had fuel pump replaced and now the check engine light is on. went to AutoZone and they coded it as a Back Stream oxygen center but a friend told me that my car, an H6.0 outback has 2 up front and 2 in the back...do I need to have them all replaced?
2005 Subaru Outback114,713Visitor
Changed front sensor twice, light again that sensor has problems
2007 Subaru Outback90,000Visitor
irregular idle, rotten smell in area of sensor, codes read. not yet fixed,am calling local dealer (suburban Subaru) tomorrow.
2011 Subaru Outback49,000Visitor
Cost 415.00 at dealer to fix
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