Hey, is it generally acceptable to clear an O2 sensor code to see if
it's triggered again? I don't have the specifics at the moment, but it
was something like "unable to read signal from O2 sensor."

The error came on about 3 months ago after I got the cheapest and
particularly nasty-smelling 87 gas. A few days later, I replaced my
battery, the error code was reset, but on the same tank of gas, the
error code came back on. I use 89 normally, and filled up with good
gas. I erased it with a scanner, and it hasn't been on since.

Does leaving the error code on make the central computer behave
differently? Should I generally not erase codes and wait for more to
be recorded?