Most heavy-duty diesel vehicles operating on Illinois public roads are now required to obtain a Clean Truck Check from CARB-credentialed HD I/M testers. Stay compliant and avoid DMV registration holds and fines of $1,000+ per day, per vehicle.






At CARB Clean Truck Check, we ensure complete customer satisfaction. We specialize in mobile Clean Truck Check “diesel smog check” inspections for 2013 and newer diesel, hybrid, and alternative-fuel vehicles.
Our OBD tests are fully compliant, with results sent directly to the Illinois Air Resources Board. If your vehicle fails the Clean Truck Check, we offer 50% off retests.
Book a mobile diesel smog check with us online or call us at 773-732-2753. We offer flexible scheduling and come to your location anywhere in Illinois.
OBD tests for newer diesel trucks are quick, while smoke (opacity) tests for older diesel trucks take longer and require additional paperwork.
Once your Clean Truck Check inspection is complete, we electronically send the results to the Illinois Air Resources Board and provide you with a copy for your records. You’ll need an account on the CTC-VIS portal for compliance reporting.
All pricing is based on the number of vehicles to be tested on a single appointment. We charge a $25 travel & fuel fee per appointment. We accept cash, check and all major credit cards.
The Clean Truck Check program, introduced by the Illinois Air Resources Board, mandates periodic emissions testing for heavy-duty vehicles over 14,000 pounds to ensure their emissions control systems are working properly. This program helps reduce air pollution from vehicles operating on Illinois roads.
The program applies to most heavy-duty diesel and alternative fuel vehicles over 14,000 pounds, regardless of whether they are registered in Illinois or out of state. Some exemptions apply, including zero-emission vehicles and certain new vehicles with low NOx emissions.
The first major deadline is July 1, 2024, when vehicle owners must register their vehicles in the Clean Truck Check database. Emissions compliance testing begins on October 1, 2024. (Note: As of August 2024, the Illinois Department of Motor Vehicles will start placing registration holds on vehicles that have not passed a Clean Truck Check inspection.) In the first year, vehicles require one test. By the third year, they must undergo four tests annually to ensure continuous emissions compliance.
Compliance is enforced through annual reporting and testing requirements. Vehicles must be tested by an Illinois-credentialed tester, and any vehicle that fails to meet the standards must be repaired to pass subsequent tests. Failure to comply can result in fines and restrictions on vehicle operation in Illinois.
The initial deadline is July 1, 2024, for vehicle owners to register in the Clean Truck Check database. Emissions compliance testing begins on October 1, 2024. In the first year, vehicles need one test. By the third year, they must undergo four tests per year to ensure ongoing emissions compliance.
Non-compliance can lead to fines, vehicle registration holds, and potential restrictions on operating the vehicle within Illinois. Vehicles that fail emissions tests must be repaired and retested to meet compliance requirements.
Contact us in a way that is convenient for you. Wherever your trucks are in Illinois, we will come to you at a day and time that works best for you.