CARB-Certified · Mobile · Southern California

Pass your Clean Truck Check without leaving the yard.

Certified mobile emissions testing for heavy-duty diesel trucks and buses — opacity, visual, and OBD inspections, with same-day results filed straight to CTC-VIS.

Request a quote See how it works

Test up to 90 days early — beat the deadline, skip the DMV block.

Clean Truck Check · On-site
What we test
CARB-Certified
  • Opacity (smoke) testing2012 & older diesel
  • OBD compliance testing2013+ diesel · 2018+ alt-fuel
  • Visual emissions inspection2012 & older diesel · 2017 & older alt-fuel
  • CTC-VIS portal reportingFiled same day
Greater LA & Southern California — larger fleets serviced statewide across California.
CertifiedCARB-Approved
No waitingSame-Day Results
MobileWe Come To You
Any size jobFleets & Owner-Ops
What we test

Every test the Clean Truck Check requires.

Whatever your trucks need to stay compliant, we run it on-site — then handle the paperwork so you don't have to.

01

Opacity Testing

The smoke test. An SAE J1667 opacity meter measures your exhaust to confirm the diesel runs within CARB limits.

2012 & older diesel
02

OBD Compliance Test

A CARB-certified reader checks monitor readiness and pulls emissions data straight from the truck's computer.

2013+ diesel · 2018+ alt-fuel
03

Visual Emissions Inspection

We verify your emissions hardware — DPF, EGR, SCR, NOx/O2 sensors, ECM — is present, correct, and intact.

2012 & older diesel · 2017 & older alt-fuel
04

CTC-VIS Reporting

We submit your results to the Clean Truck Check portal and keep you ahead of deadlines — no portal headaches.

Every test
How it works

Three steps. One stop. Done.

01

Send your vehicle info

VIN, plate, year, and fuel type. Request a quote in about two minutes — one truck or a whole list.

02

We come to you

Anywhere across LA, Orange County, or the Inland Empire. We test on-site, on your schedule.

03

Same-day results, filed

We run the test, submit to CTC-VIS, and you're compliant — well before the deadline.

Who we serve

Built for fleets and owner-operators alike.

Fleets

Schedule a yard visit and clear every unit in one stop. Minimal downtime, one point of contact, results filed across the whole fleet — larger fleets serviced statewide across California.

Owner-Operators

One truck, one appointment, done. Stay legal, avoid the citations, and keep rolling without losing a day at a test center.

Service area: Los Angeles Orange County Inland Empire + surrounding SoCal Larger fleets · statewide CA
Good to know

Frequently asked questions.

What is opacity testing?
For 2012 and older diesel vehicles. It measures exhaust smoke using an SAE J1667 opacity meter to confirm the engine is burning clean enough to meet CARB limits.
What is the visual emissions inspection?
Required for 2012 and older diesel, and 2017 or older alt-fuel vehicles. We check that the emissions control equipment — DPF, EGR, SCR, NOx/O2 sensors, ECM and more — is present and in proper condition.
What is OBD testing?
For 2013+ diesel or 2018+ alt-fuel vehicles. We use a CARB-certified reader to verify monitor readiness and pull the emissions data your truck reports.
What does it cost?
Pricing is custom and depends on vehicle count, service type, and location. Request a quote and we'll get you a number quickly.
How do I avoid penalties?
Submit your tests before the deadline — you can test up to 90 days early. Late or missing tests can lead to DMV registration blocks and CARB citations.
What vehicle information do I need?
Just four things to start: VIN, license plate number, year, and fuel type.
I cleared my engine light — how do I meet the readiness criteria?
No DTCs or Permanent DTCs (PDTCs) can be present, and once codes are cleared (SCC) the vehicle must meet one of the following:

With no PDTC present

  • At least 5 warm-up cycles (WUC) since codes cleared, or
  • At least 200 miles travelled SCC, or
  • At least 400 minutes engine run time SCC, or
  • At most 2 incomplete OBD monitors.

If a PDTC is present (code is ignored when)

  • At least 15 WUC SCC, or
  • At least 400 miles travelled SCC, or
  • At least 800 minutes engine run time SCC, or
  • At most 1 incomplete OBD monitor.

An OBD test that doesn't meet the above gets a "Not Ready" result and won't satisfy the compliance requirement. If that happens, keep operating the vehicle normally for a few days, then have it retested.

Get started

Request a quote.

Send your vehicle details and we'll come back with custom pricing and the next available appointment. One truck or a full fleet — same form.

frank4carb@gmail.com
Los Angeles · Orange County · Inland Empire

Just the basics is fine — fill in what you can and we'll follow up. Fleets: skip the per-truck details.

★ Leave at least one — email or phone — so we can reach you with your quote.

Single truck? Add its details below — optional, skip if you're a fleet.

CTC-VIS Portal

Check your status or add a vehicle.

The official CARB Clean Truck Check (CTC-VIS) portal — check a vehicle's compliance status, register a new vehicle, or submit your test results.

Open the CTC-VIS Portal