Clean Truck Check

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FRESNO COUNTY MOBILE CLEAN TRUCK CHECK

Clean Truck Check (CTC) Testing is a mandatory California Air Resources Board (CARB) regulation requiring diesel and alternative fuel heavy-duty vehicles (over 14,000 lbs GVWR) to have their On-Board Diagnostic to ensure compliance with California air quality standards.

OBD TEST

Clean Truck Check OBD testing uses a vehicle’s On-Board Diagnostics system to monitor emissions performance. During the test, the system is scanned for diagnostic trouble codes (DTCs), readiness status, and any active faults. If issues are found, they must be repaired before the vehicle can pass, helping ensure it meets emissions standards.

SMOKE OPACITY

Smoke opacity testing measures the amount of visible exhaust (smoke) coming from a diesel vehicle under load. Using a meter, the test checks how much light is blocked by the exhaust; higher opacity means more pollution. Vehicles must stay below set limits to pass, ensuring cleaner emissions.

DOT COMPLIANCE SUPPORT

We now offer DOT compliance support services to help keep your fleet organized, compliant, and audit ready. Services are provided upon request and tailored to your company’s needs.We also provide local on-demand Class A driver support for emergency truck moving, equipment relocation, or vehicle pick-up when needed. Our goal is to provide fast, dependable, support that helps keep your operation moving efficiently and compliantly.

Consequences of Non-Compliance:

Massive Daily Fines: CARB can issue severe fines, frequently reaching over $10,000 per day per vehicle, especially for ignoring notices.DMV Registration Holds: California will block registration renewals, preventing you from registering your vehicle.Operational Shutdowns: Non-compliant vehicles are prohibited from operating on California roads and face potential "Do Not Operate" orders.Increased Inspections: Vehicles may be flagged, resulting in more roadside inspections and potential impoundment.Legal Action & Fees: You may face civil penalties, and if you miss the deadline, you must resolve all issues to avoid further escalation.

about us

SOTO MOBILE CARB TESTING

Soto Mobile CARB Testing is a Fresno-based, company providing professional, on-site emissions testing services. We perform all testing in accordance with California Air Resources Board (CARB) regulations, including OBD and Smoke Opacity Testing for diesel vehicles. Our mobile approach is designed to minimize downtime while delivering accurate, reliable results to keep your fleet compliant and operating efficiently.