Yes — plug-in hybrids are NOT smog-exempt in California. They receive the same biennial full smog inspection as conventional hybrids, using OBD-II protocol.
- PHEV smog exemption is a common misconception — the combustion engine is still inspected
- OBD-II readiness monitors must be set even on vehicles that run primarily on electricity
- Drive the vehicle in hybrid/combustion mode for 30-plus miles before testing to ensure monitors are set
- Common PHEVs requiring smog: Prius Prime, RAV4 Prime, Wrangler 4xe, BMW 330e, Honda Clarity, Hyundai Tucson PHEV
- EV-only mode driving does not warm the combustion system enough to set EVAP and catalyst monitors
Per BAR smog exemption rules — only pure BEVs (battery-electric only) are exempt.