Five Star Carb Testing
CARB Clean Truck Check HD/IM — periodic smog & opacity testing brought directly to your yard. Compliance, simplified.
Five Star Carb Testing — Clean Truck Check
Clean Truck Check HD/IM Mobile Smog & Opacity Testing
If you operate diesel trucks in California with a gross vehicle weight rating (GVWR) of 14,000 lbs or more, you're required to comply with the CARB Clean Truck Check program.
We bring the testing equipment to your fleet — saving you downtime, fuel, and the hassle of scheduling shop visits. Certified technicians, modern OBD & opacity equipment, and same-day reporting.
What we do
Mobile testing built for working fleets
HD/IM Opacity Testing
Snap-acceleration opacity tests for diesel trucks ≥14,000 lbs GVWR, per CARB Clean Truck Check protocol.
OBD Compliance Scans
Full OBD diagnostic capture and submission for model-year 2013+ diesel and heavy-duty vehicles.
Fleet Reporting
Bulk testing, digital records, and direct submission to the CARB database. One technician, your whole yard.
How it works
Compliance in three simple steps
Skip the line at the testing station. We come to you, get every truck tested, and file the results — usually in a single visit.
- 1Book a visitCall or message us with your fleet size and location. We schedule around your operations.
- 2On-site testingOur mobile unit arrives and runs CARB-compliant opacity and OBD tests on each vehicle.
- 3Submitted & doneResults are uploaded to CARB the same day. You get digital records for every truck.
Ready to get CARB compliant?
Reach out today — we'll schedule a mobile testing visit for your fleet, anywhere in California.