This light seems to come back (after having been reset) whenever one of
the rear wheel slips even a little under power. I noticed it come on
when under slight acceleration turning right from a stop.
This time my mechanic hooked up to the computer and indeed tracked the
error coming from the rear differential. He did a bunch of other stuff
to the car that was unrelated but that's as far as we got with the red
check engine light. Of course, within a few days, it's back.
Having spent way too much on engine and much more, I'm reluctant to
ignore this light. At the same time, I'm getting sick of putting more
$$ into her.
Has anyone seen this before?