Do I have to reset the ECU when....

[joel & viola]

> I recently replaced the rear 02 sensor with the earlier 3 wire one from a
> 95-97 SE-R because I re-wired the ECU to work on my 98. Do I have to reset
> the ECU to get rid of the check engine light or does it go out on it's own
> once everything's all connected to the correct wire? TIA

Yup, I believe you have to reset it.
It may reset on it own after a zillion start
ups. But who wants to wait that long. Plus
the car may run better after you reset so
go for it.