Testing frequency increases for many fleets — check your CTC-VIS deadline
California CARB Clean Truck Check · Statewide

Clean Truck Check,
done for you.

The CC40 plugs into your eligible truck and tests automatically — filing results with CARB over built-in cellular. Prefer we come to you? We do on-site mobile testing statewide. Either way, the deadline you always forget becomes one you never think about.

Explore the CC40 Book Mobile Testing
4,000+Tests completed
20+Years in emissions
CredentialedCARB tester
Call and you get Danny, the owner — English or Spanish. No call center, no runaround.
CC40 · Live MODEL CC40
The CC40 automatic Clean Truck Check device with its cable and connectors CC40
No testing appointments to schedule
Two ways to stay compliant

Pick the path that fits your fleet

Automatic device testing or on-site mobile testing — both keep you CARB-compliant, both handled by the same team that answers the phone.

Automatic · hands-off

CC40 Automatic Testing

A device that plugs into your eligible truck and tests on its own — no appointments, no driver involvement, results submitted to CARB automatically. Set it once, forget the deadline.

  • Best for fleets that want zero scheduling
  • Built-in cellular — no Wi-Fi, no app
  • $289/yr per truck — $259 promotional, everything included
See how the CC40 works →
We come to you

Mobile Testing

We bring CARB Clean Truck Check testing to your yard, statewide. One visit clears multiple trucks — no downtime driving to a shop, no waiting rooms, results filed for you.

  • Best for mixed fleets & one-time testing
  • We travel to your location, north & south CA
  • Volume pricing — more trucks, lower per-truck
See mobile testing →
Not sure which fits? Call 530-378-9111 — we'll tell you straight, often both.
Why this matters

Missing a deadline can put your registration on hold

Noncompliance with Clean Truck Check can lead to CARB enforcement action and California DMV registration holds — and can interfere with fleet operations, customer requirements, and access to certain facilities.

DMV

Registration holds can follow noncompliance with the program.

Roadside

CARB uses roadside screening and can issue a Notice to Submit to Testing.

4×/yr

OBD testing increases to quarterly starting October 2027 — double today.

Staying ahead of it is far easier than catching up. See how the CC40 handles it →
4,000+
Tests Completed
20+
Years Experience
5.0★
54 Google Reviews
CARB
Credentialed Tester
CA
Statewide · Bilingual
Built for the fleets that run on diesel

Who we keep compliant

Trucking & Freight
Construction & Excavation
Concrete & Aggregate
Dump & Haul
Pipeline & Utility
Owner-Operators
What it actually does for you

Deadline tracking, off your plate

You're already running loads, crews, and equipment. The CC40 carries one of those deadlines so you don't have to — no appointments, minimal disruption, and no manual testing for eligible OBD trucks. Our customers say it best: they stopped thinking about it.

It tests on its own

The CC40 performs the test automatically when the truck is ready and submits it straight to CARB. Nothing for you or your driver to do.

Plug-and-go install

It ships programmed to your truck with the right cable. Plug it into the diagnostic port, mount it, done — the easiest part.

Its own cellular

No Wi-Fi, no Bluetooth pairing, no driver's phone. The connection is built into the device and included for the whole term.

Fewer missed deadlines

A missed test can freeze your registration and park a truck. The CC40 attempts testing when the truck is ready and submits on its own — that worry, off your shoulders.

$289Per vehicle / year
Everything included. The device, cable, programming, cellular service, shipping, and testing for the term.$259 promotional price — currently available, $289/year standard. Lock your rate when you start.Eligible: 2013-and-newer diesel · 2018-and-newer alternative fuel · over 14,000 lb GVWR · compatible J1939 or J1979 connection.
See the CC40
How the CC40 works

Set it up once. It tests from then on.

1

You send the vehicle info

VIN, license plate, engine details, and the testing schedule for that specific truck.

2

We program the device

Each CC40 is locked to one vehicle. One truck, one device — no swapping between units.

3

Plug it in

It ships with the right cable and powers itself from the OBD port — no wiring, no electrician. Connect it, mount it, done.

4

It tests automatically

Built-in cellular submits the test when the vehicle is ready. No app, no phone, no driver involvement.

How it works for your fleet

Simple to install. Easy to manage.

What you receive, what the system does, and who it's built for — in three steps.

The CC40 device with its cable, ready to install
1

Programmed and shipped ready

Your CC40 arrives pre-programmed to your truck's VIN and testing schedule, with the correct J1939 or J1979 cable. Everything you need to install — nothing to configure.

Testing Activity
Unit 214Freightliner · #1FUJ...blurred
PassOct 12 · 9:04a
Unit 087Kenworth · #3AKJ...blurred
PassOct 12 · 8:41a
Unit 156Peterbilt · #1XPB...blurred
ReadyOct 11 · 6:12p
Unit 042Volvo · #4V4N...blurred
PassOct 11 · 2:30p
Example view
2

Automatic testing and reporting

The CC40 tests each truck when it's ready and submits eligible results to CARB automatically. See every vehicle's activity, status, and date in one place — no spreadsheets, no guessing.

3

Less downtime for your fleet

No pulling trucks off a job to drive to a shop. Testing happens on your schedule, wherever your trucks are — built for working fleets that can't afford to sit idle.

A branded A+ Plus CC40 installed in a truck cab, plugged into the green J1939 diagnostic port
In the box & on the port

Your ELD keeps its port

Your truck has one diagnostic port, and there's a good chance something is already plugged into it. The CC40's cable has a pass-through connector, so your ELD or GPS unit stays connected and keeps working. Nothing gets unplugged. Nothing gets chosen over anything else.

Device

The CC40 itself, programmed to your specific vehicle before it ships.

Cable

The correct cable for your truck — 9-pin (J1939) or 16-pin (J1979) — with a splitter so your ELD or GPS keeps its port.

Cellular

Built into the device and included for the service term. Nothing to activate.

Install

Plug the cable into the port, plug your ELD into the pass-through, mount label-side up. Done.

Why fleets choose A+ Plus

You're calling the owner, not a call center

More than 20 years in automotive repair, smog, emissions, and fleet service — and the person who answers when you call. No call center, no runaround.

Less downtime

Trucks stay in your yard. Testing happens between runs instead of replacing them.

No unnecessary trips

No shop appointments, no driver hours burned sitting in a testing line across town.

Clear communication

You get told what passed, what didn't, and what to do about it. In plain language.

Retesting support

Retesting is included under our standard service policy, so a second pass is already accounted for.

Fleet pricing

Straightforward per-truck pricing that improves as the count goes up. Call for a fleet quote.

CARB experience

4,000+ tests and a credentialed tester who knows how the program actually runs day to day.

Got older trucks too?

We test the ones the CC40 can't

The CC40 covers OBD trucks — generally 2013-and-newer diesel and 2018-and-newer alternative fuel. Got an older dump truck, water truck, or a 2010 tractor that needs smoke and visual (OVI) testing? A credentialed tester comes to your yard or job site. One company covers your whole mixed fleet.

On-site

We come to your yard, anywhere in California.

Older trucks

OVI smoke & visual for 2012-and-older diesel.

Fleet pricing

From $95 for one truck, $85 each for two or more.

Retesting

Included under our standard service policy.

See Mobile Testing
Clean Truck Check, briefly

What the program asks of you

California's Clean Truck Check requires periodic emissions compliance testing for most heavy-duty vehicles operating in the state. Which test your truck needs depends mostly on its engine year.

Please verify your own deadlines. Requirements, testing frequency, and deadlines are set by CARB and may change. Always confirm your vehicle's status and due dates in the CTC-VIS portal. This page is general information, not a compliance determination.
>14k LB

Most covered heavy-duty vehicles are over 14,000 pounds GVWR.

2013+

2013-and-newer diesel generally uses OBD testing — this is what the CC40 automates.

2018+

2018-and-newer alternative-fuel vehicles are generally OBD-eligible as well.

≤2012

2012-and-older diesel generally requires smoke & visual (OVI) testing — mobile testing, not the CC40.

CTC-VIS

Your deadlines live in the CARB portal. Check them there, or send us your VINs.

Before you can test, you have to register

Lost in the CARB portal? We'll help you sort it out.

Every truck has to be registered in CARB's CTC-VIS system, an annual fee paid, and testing reported — before any of the testing even matters. The portal is written for regulators, not truck owners, and getting it wrong is how people end up out of compliance without realizing it.

So we help you through it. Send us your fleet and we can assist with registration, entering vehicle information, fee guidance, deadline review, and confirming that submitted results appear in the portal. You remain responsible for your account, fees, deadlines, and compliance — but you don't have to figure it out alone.

Get Help With CTC-VIS

We help with

  • CTC-VIS registration & setup
  • Entering your vehicles correctly the first time
  • Annual compliance fee guidance
  • Confirming submitted results appear in the portal
  • Reading your deadlines so you don't have to
Cross-border fleets · Bilingual support

Trucks that cross into California

Out-of-state & cross-border

Registered outside California? You may still be covered.

Qualifying heavy-duty vehicles on California roads may be subject to Clean Truck Check — even when registered outside California, or outside the United States. Many cross-border carriers aren't sure whether the program applies, or how to comply from across the border. We provide bilingual support and help you automate eligible OBD testing with the CC40.

  • Whether the program applies to your vehicles
  • How CTC-VIS registration works & your deadlines
  • Automating eligible OBD vehicles with the CC40
Call for Bilingual Support
The part no device can do

The one part we won't automate: the phone

The CARB rules are written for regulators, not for you. Most people read them once and still aren't sure they're doing it right — and there's nobody to ask. That's the part we fix that no gadget can. Call and you get Danny: 20+ years in emissions, who tells you plainly which of your trucks need what, and when.

530-378-9111
Danny Barbosa, owner · English & Spanish
A person picks up

Not a portal, not a ticket. You explain your fleet once and get a straight answer.

We read CTC-VIS with you

Not sure what's due or what a truck needs? Send your VINs — we'll tell you.

No catch, flat price

$289/year list, $259 promotional right now — everything included. You've been upsold before — this isn't that.

What fleet owners say · 5.0 from 54 Google reviews

"I stopped thinking about it"

Real A+ Plus customers, in their own words — simple installation, direct support, and relief from repeatedly scheduling eligible OBD tests.

★★★★★

The CC40 has made CARB Clean Truck Check compliance much easier for our fleet. Not having to schedule an appointment or find a shop has been completely worth it. Installation was very easy, and I plan to install the CC40 in all future trucks we purchase.

OS
Omar S.
Solidify Transport LLC
★★★★★

Incredibly easy to plug in and start using right away. The biggest benefit has been not scheduling mobile testing appointments anymore. It automatically submits the tests to CARB, keeping our trucks compliant while they're out on the road. We're adding another device.

K
Keith
UWF Inc.
★★★★★

An excellent tool for our fleet. Very easy to install and takes the headache out of Clean Truck Check compliance. I'd recommend this device to any busy company looking to save time and avoid the hassle of scheduling tests. A+ Plus makes the entire process very simple.

M
Mike
C. Wells Pipeline
★★★★★

Installation was simple, and the automatic testing and reporting save us time while keeping our vehicle compliant and on the road. The biggest benefit is the cost savings — we no longer need to schedule on-site CARB-certified technicians for testing appointments.

NP
Nenad P.
TDE Inc.
★★★★★

Plugging it in was super easy, and it gives me peace of mind knowing the testing process is being handled automatically. It has been a great device for our operation.

EG
Ernesto G.
E.G. Excavating
Join them

Tell us what you're running and we'll get your trucks testing themselves.

Call 530-378-9111
Service area

The whole state, not just one city

California statewide service, with bilingual support for cross-border fleets. Mobile testing throughout the state, north and south — and CC40 devices ship anywhere your trucks are based.

NNorthern California

Sacramento ValleyBay AreaCentral ValleyRedding & northStocktonModesto

SSouthern California

Los Angeles CountyInland EmpireOrange CountySan Diego CountyBakersfieldHigh Desert
Questions fleets ask

Straight answers

Does my truck need Clean Truck Check testing?+
Most heavy-duty vehicles over 14,000 pounds GVWR operating in California are covered. The reliable answer for your specific truck is in the CTC-VIS portal — send us your VINs and we'll walk through it with you.
What's the difference between mobile testing and the CC40?+
Mobile testing is a person: a credentialed tester comes to your location and performs the test. The CC40 is a device: it stays plugged into one specific truck and tests itself when the vehicle is ready. Mobile works on any covered vehicle; the CC40 only works on OBD-eligible ones.
Does the CC40 require Wi-Fi?+
No. Cellular service is built into the device — no Wi-Fi, no Bluetooth pairing, no app on the driver's phone, nothing for your drivers to remember to do.
Will the CC40 work on older trucks?+
No. The CC40 is for OBD vehicles — generally 2013-and-newer diesel and 2018-and-newer alternative fuel, over 14,000 lb GVWR, with a compatible J1939 or J1979 connection. 2012-and-older vehicles need smoke and visual testing, which we handle with mobile testing.
What happens if my truck isn't ready to pass?+
Neither service repairs vehicles. If a truck has a check-engine light, stored trouble codes, incomplete monitors, a communication problem, or an actual emissions defect, it won't pass until that's fixed. We'll tell you exactly what we're seeing so you can get it addressed, and retesting is included under our standard service policy.
Can you test an entire fleet at one location?+
Yes — that's the point of mobile testing. Bring the trucks to one yard and we test them in a single visit. Pricing improves with volume: $95 for one truck, $85 each for two or more, with better per-truck rates for larger fleets — call for a fleet quote.
How do I check my deadline?+
Your compliance dates are in CARB's CTC-VIS portal. If you'd rather not dig through it, send us your VIN list and we'll tell you what's due and when.
Does a passing test automatically clear DMV issues?+
A passing Clean Truck Check test is a Clean Truck Check test. It doesn't resolve unrelated DMV registration holds, other program requirements, or anything else on the vehicle's record. If you have a hold, check what's driving it before assuming a test clears it.
Before you hand anyone your VINs

Don't take our word for it. Check it.

We tell you to verify your own deadlines in CTC-VIS rather than trust a vendor. Same standard applies to us. Here is every claim on this site and how you can confirm it yourself.

  • Credentialed CARB tester Verifiable

    Ask for the credential before you book, and confirm it against CARB's Clean Truck Check program materials at ww2.arb.ca.gov. Any tester who will not give you their credential is the wrong tester.

  • A+ Plus Clean Truck Check LLC On record

    A registered California limited liability company. Searchable in the California Secretary of State business database. You are contracting with a registered business, not an individual with a scan tool.

  • 4,000+ tests completed Our records

    This is our internal count across mobile testing and CC40 submissions. We cannot show you other customers' records, and neither can anyone else who makes this kind of claim. Judge it against the named references below.

  • Reviews from named companies Verifiable

    Every review on this site carries a real company name — Solidify Transport, UWF Inc., C. Wells Pipeline, TDE Inc., E.G. Excavating. All of them, plus 49 more, are on our Google profile — 5.0 across 54 reviews. Read every one, or ask us for a reference and call the company yourself.

  • Not affiliated with CARB Stated plainly

    We are an independent testing provider. We do not work for CARB, we cannot waive a requirement, and we cannot clear a DMV hold. Anyone implying otherwise is telling you something untrue.

  • Testing does not repair trucks Stated plainly

    Neither service can make a truck pass. A check-engine light, stored codes, incomplete monitors, or a real emissions fault all have to be fixed first. We will tell you exactly what we see, and retesting is included under our standard service policy.

  • Your deadlines are yours to confirm Verifiable

    Your compliance dates live in your own CTC-VIS account, not in ours. We will read it with you and tell you what is due, but the account stays in your name and the record stays yours.

What we will never do: tell you a truck needs a test it does not need, quote one price and invoice another, or make a compliance promise on CARB's behalf. Requirements and deadlines are set by CARB and can change. Confirm yours in CTC-VIS.

Let's talk about your fleet

One call sorts your whole yard

Tell us what you're running — years, VINs, how many. We'll tell you what's due, which trucks the CC40 covers, which need us on site, and what it costs. No obligation, no pressure.

1You tell us what you're running
2We check what's due and what each truck needs
3You get a straight price before you commit
530-378-9111
Danny Barbosa, owner · English & Spanish
Call Danny Now Have Danny Call You
Or email danny@aplusctc.com