Clean Truck Check - What to Do When an ECL is Missing/Illegible
What is an engine label or emission control label (ECL)?
All heavy-duty vehicles need to have proof that the engine meets appropriate emissions standards by having the manufacturer ECL properly affixed on the engine and fully legible.
Avoid CARB Enforcement roadside inspection citations and penalties for vehicles with a missing Emission Control Label (ECL)
If you are unable to obtain the ECL, you must request the manufacturer write you a letter stating the label is unavailable. Engine information must be provided on the manufacturer's letter. Engine information includes but is not limited to, Engine Family Name (EFN), Engine Model Year (EMY), Engine Serial Number (ESN) and emissions control equipment, e.g., SCR, PTOX, EGR, ECM etc. must be provided on the manufacturer's letter.
A copy of the letter must be kept in the cab of the vehicle in a place known to the driver.
Heavy-duty vehicles manufactured before 1974 or were originally not equipped with an ECL but have evidence that the vehicle meets Environmental Protection Agency (EPA) and CA emissions standards may note “Not Applicable” in the form submission section for “Engine Family Name”.
For sample images of the ECL, visit Engine Label or Emission Control Label.