Ram Smog Check
Ram pickups + ProMaster vans need California smog. Ram 2500/3500 with the Cummins 6.7L diesel must have intact DEF + DPF emissions systems to pass. Aftermarket 'tunes' typically fail visual inspection.
Common reasons a Ram fails California smog
- Cummins diesel with deleted DPF, EGR, or DEF — instant fail
- Aftermarket tuners/programmers triggering emissions codes
- Ram 1500 EcoDiesel: emissions recall compliance check
- ProMaster vans with aftermarket exhaust modifications
How to prepare your Ram (pass first try)
- Restore OEM emissions equipment if deleted (no shortcuts in CA)
- Remove aftermarket programmers — back to stock tune
- Drive 50+ miles after any clearing
- Confirm DEF tank is full
Ram vehicle categories
- gas (1500, ProMaster City)
- diesel (2500/3500 Cummins, 1500 EcoDiesel)
Common Ram smog questions
Where can I get a Ram smog check?
Any of our 13 BAR-licensed STAR-certified locations in San Diego, Orange, and Riverside counties handle Ram smog inspections. Walk-ins welcome. 15-25 minute inspections.
What are common reasons a Ram fails smog?
Cummins diesel with deleted DPF, EGR, or DEF — instant fail is one of the most common. Visit our shop for diagnosis if your check engine light is on.
How can I prepare my Ram for smog inspection?
(1) Restore OEM emissions equipment if deleted (no shortcuts in CA). (2) Remove aftermarket programmers — back to stock tune. (3) Drive 50+ miles after any clearing.
Is my Ram EV/BEV exempt from California smog?
Yes — any 100%-electric Ram (no gasoline engine) is exempt under California Health & Safety Code §43002. PHEV versions are still required.
STAR-certified shops near you
All locations handle Ram smog inspections. Walk-ins welcome.