California Clean Truck Check

In California, every diesel or alternative heavy fuel truck over 14,000 lbs must register for a Clean Truck Check. pay an annual fee, and pass recurring emissions tests. We handle your CTC filings so you never miss a deadline, skip the administrative drag, and avoid the steep penalties for non-compliance.

 

  • CTC-VIS registration
  • Annual compliance fee payment
  • Filing coordination

Description

California Clean Truck Check Compliance & Filing Service

California’s Clean Truck Check (CTC) is a recurring state emissions program for heavy-duty vehicles. Run by the California Air Resources Board (CARB), it applies to nearly all diesel, alt-fuel, and hybrid vehicles over 14,000 lbs operating in California. 

We handle every CTC obligation on your behalf — registration, annual fees, and recurring filings –so your trucks never get hit with a DMV registration hold or a CARB enforcement action.

Need to Know

The penalty is a registration hold

  • Miss a deadline and the truck gets a DMV registration hold -- it legally cannot operate in California until compliance is restored. Getting caught isn't a matter of chance: non-compliant trucks can be denied entry at ports and railyards.

Who is required to file for the Clean Truck Check?

  • Nearly all diesel, alternative-fuel, and hybrid vehicles over 14,000 lbs CVWR operating on California public roads including: commercial trucks and buses, out-of-state vehicles if they operate in California, and single-vehicle fleets.

The fines are serious

  • Under California Health and Safety Code Section 42402, CARB can pursue civil penalties of $1,000 to $10,000 per day, per vehicle for non-compliance. A single truck out of compliance for a week can generate $70,000 in exposure. CARB confirmed in January 2026 that Clean Truck Check enforcement remains fully in effect for all trucks operating in California, regardless of where they are registered.

Why DOT Compliance Group?

  • We serve carriers across the DOT compliance landscape
  • We know the system and watch it for every truck you own.
  • We are proactive, not reactive
  • We grow with you
  • We help you get your time back to running your business

Frequently Asked Questions

Does my truck have to comply with California’s Clean Truck Check?

The rule applies to nearly every diesel and alternative-fuel heavy-duty vehicle that drives on California roads — including out-of-state trucks just passing through. Owner-operators with a single truck are covered too. If you’re not sure where your fleet stands, our free compliance check will tell you exactly which of your trucks are subject to the rule.

Yes. If your trucks drive in California, the rule applies regardless of where they’re registered. CARB confirmed in January 2026 that Clean Truck Check enforcement remains fully in effect for all trucks operating in the state, even after the EPA’s partial SIP disapproval. Many out-of-state carriers don’t realize they’re subject to it until a truck gets flagged — which is exactly the gap we close.
Most trucks test twice a year right now, and OBD-equipped vehicles move to four times a year starting October 2027. Deadlines are staggered — each truck’s due date is tied to its DMV registration or VIN, so a fleet ends up juggling dozens of different dates. We monitor each truck’s calendar and act ahead of every deadline, year-round.
The physical emissions test must be completed at a CARB-credentialed testing station, which the carrier arranges. We monitor your truck compliance and notify you when a test needs to be scheduled, so it never slips.

No — they’re two separate programs, and your heavy truck falls under Clean Truck Check, not the smog check.

The smog check is for passenger cars and light trucks, runs through the DMV, and only happens every two years. Clean Truck Check is run by CARB and applies to diesel and alternative-fuel vehicles over 14,000 lbs.

The big practical differences for you:

  • It’s much more frequent: every six months for most trucks right now, moving to quarterly for newer OBD-equipped trucks in October 2027.
  • The test has to be done by a CARB-credentialed tester and reported into CARB’s CTC-VIS system.
  • There’s a recurring annual compliance fee ($32.13 for 2026) on top of the test.
  • Enforcement is tougher: miss a deadline and you’re looking at a DMV registration hold and being turned away from ports and railyards.

So if you’ve only dealt with a car smog check, expect Clean Truck Check to be a heavier, more ongoing obligation — which is exactly the deadline tracking we take off your plate.

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