There are many ways:
1: ;all OBD2 cars reset automatically, but can take many driving cycles.'(if cured !)
2: push the reset, (clear) DTC button on the scan tool.
3: pull PCM fuse, marked memory backup ,for 1min put back
4: pull neG lug of battery but this will cause PCM go to relearn mode on all things having this, transmission shift points and idle speed controls and more,
#2 is what all shops do. for sure, but yoiu can not get smog check until the OBD2 smog checks run out, and shows they did in the scans. (as seen here)
https://www.obdautodoctor.com/scantool-garage/obd-readiness-monitors-explained
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