Plain-English answers to every California smog check question
Does a plug-in hybrid need a smog check in California?
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.
Related questions
Do hybrids need a smog check in California?Yes — hybrids need a smog check after the first 8 model years. They are treated like gasoline vehicles.
Do Teslas need a smog check in California?No — they are fully exempt.
Do plug-in hybrids need a smog check?Yes — plug-in hybrids have a combustion engine and need smog after the first 8 model years.