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catback exhaust

  1. 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...