My check engine light of my 94 accord lx went on yesterday, so I flashed the
error code with a paperclip.
It appeared to be error 41, which says that the heater circuit of the oxygen
sensor is malfunctioning. I read that the heating is only used when the
motor is still cold, and otherwise doesn't have a function. Does this mean I
don't have to hurry replacing the oxygen sensor?
Does it give me a bad milage, even when I mainly drive long distances? Is it
hard to replace the oxygen sensor yourself?

Wilfred