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o2 sensors
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  1. EJ25 - 2.5L Non-Turbo (1998-2010)
    I have a 2010 Forester X. I had a major, catastrophic engine failure at 245K. I totally rebuilt the engine including all new pistons, rings, one connecting rod, all new bearings, one new head, new catalytic converter... rebuilt everything. When I was done, the O2 codes were set. I tried to clear...
  2. EJ25 - 2.5L Turbocharged (2004-2013)
    First post here. I know there’s many threads regarding o2 sensors and whatnot but I can’t seem to find exactly what I’m looking for. My CEL is on with code P0134 - O2 circuit no activity detected (bank 1, sensor 1) I know I need to replace the o2 sensor 1 (air/fuel sensor). I have the part and...
  3. EJ25 - 2.5L Non-Turbo (1998-2010)
    I have a 1999 Forrester. I am having issues getting it to pass inspection. From what I know the car has had an 2001 engine swap. The exhaust has two o2 sensors is this a 99 exhaust or 01?
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