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WCWest CoastClean Truck Check
Mobile Clean Truck Check

We bring the test to your trucks.

California-certified HD I/M emissions testing for diesel and alternative-fuel fleets. On-site, by appointment, statewide.

Why we exist

Compliance without the detour.

Fleet operators shouldn't have to reshuffle an entire day to get a single truck inspected. West Coast Clean Truck Check sends a certified tester to your yard, your site, or your route, anywhere in Southern California, and gets your vehicles compliant without taking them out of service.

What is Clean Truck Check?

A California emissions program for heavy-duty vehicles.

Clean Truck Check (HD I/M) is a California regulation requiring periodic emissions-control testing on nearly all diesel and alternative-fuel heavy-duty vehicles with a Gross Vehicle Weight Rating over 14,000 lbs that operate on California public roads, regardless of where they're registered.

Who it applies to

  • Motorcoaches
  • Transit, shuttle, and school buses
  • Commercial vehicles
  • California-registered motorhomes
  • Single-vehicle fleets

How it works

Simple, on-site, compliant.

  1. Request an appointment

    Tell us about your vehicles and where they're parked. We'll confirm a window that fits your operation.

  2. We come to you

    A certified tester arrives with the equipment needed to run the OBD (HD I/M) test on each covered vehicle.

  3. You're compliant

    Results are submitted directly to CARB. You get documentation for your records. No trip to a shop required.

Coverage

Southern California.

From Los Angeles and Orange County to the Inland Empire and San Diego, our mobile service covers every public road and highway across Southern California.

Request a Quote

Diesel & alt-fuel

Heavy-duty trucks + buses

On-site SoCal

Southern California

CARB-certified

Results submitted for you

24/7 appointments

Around your operation

Southern California mobile Clean Truck Check testing. We come to your trucks.