Tesla vehicles are pure battery-electric, so they are fully exempt from California's smog check — no emissions test, no OBD-II scan, and no smog station visit required. The DMV processes Tesla registration without a smog certificate.
Per BAR Smog Check exemption list (bar.ca.gov/smog-check) and CA DMV electric vehicle registration rules.
Cite this answer — stable link: smoganswers.com/q/what-does-a-tesla-smog-check-involve-in-california/#answer