[V8] Re-set fault codes

[pdlord at talent.com.au]

Can someone please remind me where I can find how to do this? I seem to remember
if you pull a certain relay, it'll reset.

I have fitted a new 02 sensor and maybe I'm imagining it but it seems to idle
rougher than before. Not bad, but not silken smooth, either. I want to see if
it's got codes but obviously no point if it's still registering a code because
of the old (bad) sensor.