Hello Folks
I have a 1998 legacy with ej20, a couple of months ago the engine light started coming on when the car was pulling hard/heavy, but went away again on flatter, easier roads. I read the codes and it said it was the oxygen sensor, so i bought a new genuine subaru one and put it back in. Just after 2 days the lamp comes back on again, same as before, only on when cars working hard. Code again says oxygen sensor. I measured the wiring and sensor and everything seems it be like it should so it seems something else is triggering this code.
Anyone else experienced similar and have any thoughts? any other sensors thats failureprone on these older ej20s?
Car has very low milage and engine is pretty mint except for this engine light problem.
Thanks in advance for any help