Check engine light, sensors (includes O2 or oxygen sensor), emission control devices (includes EGR), engine computer, engine computer, fuel cap, fuel gauge/sender, fuel injection system, fuel pump, fuel leaks, stalling or hesitation.
What Owners Say
“warning light is on. catalytic converter needs to be replaced, but is expensive”Anonymous, ID (2005 Subaru Impreza Unsure 2.5-L 4 Cyl)
“Catalytic converter failed because of ignition problems”Anonymous, ON (2005 Subaru Impreza RS 2.5-L 4 Cyl)
“Multiple sensor failure led to extremely rough running. Over-rich mixture may have fouled CAT”William F., MN (2005 Subaru Impreza RS 2.5-L 4 Cyl)
“I replaced the O2 sensors a few years ago and now it seems to be the same problem again. As far as I know O2 sensors are not really meant to fail so there's some underlying issue here”Anonymous, OR (2005 Subaru Impreza RS 2.5-L 4 Cyl)
“O2 sensor was replaced with aftermarket but replaced again with oem after a little over a year”Jong P., AB (2005 Subaru Impreza RS 2.5-L 4 Cyl)
“Car has been into 5 different shops, and the sensor has been replaced, but no one can tell us why it keeps coming back on”Anonymous, CT (2005 Subaru Impreza RS 2.5-L 4 Cyl)