Clean Truck CheckMobile
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Vehicle Lookup

Do I need a
Clean Truck Check?

Free check. Enter your VIN — we cross-reference NHTSA vehicle data against the CARB CTC scope rules and tell you which test (if any) applies, plus citations to the CARB rulebook so you can verify.

Check your vehicle

Any exemptions to declare?
Your result

We'll tell you whether your vehicle needs a test, which one, the testing frequency, and any caveats — with citations from the CARB rulebook.

How this works

Source-cited, not guessed.

  1. 1If you provide a VIN, we call NHTSA's free vPIC API to decode make, model, year, fuel, and GVWR class. The VIN is never stored.
  2. 2We apply CARB's scope gates (GVWR > 14,000 lb, diesel/alt-fuel/hybrid, CA operation) and exemption rules from the official rulebook.
  3. 3We tell you which test applies (OBD for MY 2013+ diesel; Smoke Opacity for older), with cited sources and any caveats you should verify yourself.
  4. 4This is a planning tool — not legal compliance advice. Cross-check with cleantruckcheck.arb.ca.gov before final decisions.