Testing frequency increases for many fleets — check your CTC-VIS deadline
NATIONWIDE CC40 AUTOMATIC TESTING · CALIFORNIA MOBILE TESTING

Nationwide CARB testing,
done for you.

The CC40 gives eligible fleets automatic Clean Truck Check testing anywhere in the U.S. — it tests the truck and submits eligible results to CARB over built-in cellular. Prefer we come to you? Our on-site mobile testing is available throughout California.

Explore the CC40 Book Mobile Testing
Help me chooseOpen my CARB portal
4,000+Tests completed
20+Years in emissions
CredentialedCARB tester
5.0★5.0 star Google rating
Call and you reach an experienced Clean Truck Check professional — 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

What would you like to do?

Choose your next step, or call A+ Plus at 530-378-9111 and we will help you get started.

Get automatic testingSee how the CC40 tests eligible trucks nationwide and submits results to CARB.Understand CC40 & get started → Book a mobile testWe come to your California yard. Tell us where your trucks are and request a visit.Request mobile testing → Open my CARB portalSign in to CTC-VIS to check deadlines, pay CARB fees and confirm compliance.Open the official portal → Help me figure it outQuestions about your trucks, testing or results? Ask our team. English or Spanish.Send A+ Plus a message →

CC40 testing works nationwide for eligible vehicles that operate in California. Mobile visits are available in California.

RUNNING OUTSIDE CALIFORNIA

Nationwide Clean Truck Check testing with CC40

Clean Truck Check applies to out-of-state trucks that operate in California. With a CC40 installed, an eligible truck completes its testing while it’s running anywhere in the U.S. — the device tests the vehicle, submits the results to CARB, and CARB sends the compliance information to DMV. No deadhead back to California, no appointment.

See how the CC40 works →

Not sure when your trucks are due?

For standard California registrations, Clean Truck Check deadlines follow your registration expiration, not the last time you tested. Out-of-state and exempt-plate vehicles use a VIN-based schedule. Send a photo of your registration — that has everything we need to tell you what’s likely due and what each truck requires. No charge, nothing to sign.

Check my due dates → Already tested? Understand my result →
Two ways to stay compliant

Pick the path that fits your fleet

Choose one below — or call and we will tell you which fits.

Automatic device testing or on-site mobile testing — both handle the testing part of Clean Truck Check compliance, both handled by the same person who answers the phone.

Automatic · hands-off · TESTS ANYWHERE IN THE U.S.

CC40 Automatic Testing

A device that plugs into your eligible truck and tests on its own — no appointments, no driver involvement. The CC40 tests the vehicle, submits the results to CARB, and CARB sends the compliance information to DMV. Set it once, forget the deadline.

  • Best for fleets that want zero scheduling
  • Built-in cellular — no Wi-Fi, no app
  • Tests wherever the truck is running, in any state
  • $299.99/yr per truck — $259 promotional, everything included
See how the CC40 works →
We come to you · CALIFORNIA ONLY

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 submitted to CARB for you.

  • Best for mixed fleets & one-time testing
  • We travel to your location — within California only
  • $95 per test — same rate at any fleet size
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 →
Before you hand anyone your VINs

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

We tell fleets to verify their own deadlines in CTC-VIS rather than trust a vendor. Same standard applies to us — the credential, the LLC, the reviews, and the things we can't prove and won't pretend to.

See every claim and how to check it

Questions fleets ask

Straight answers

Tap any question to open it.

My check engine light is on. Can you still test it?
We can test it, but it will fail. The check engine light is the malfunction indicator lamp — it exists to report emissions faults, so when it is on the truck is already reporting a problem the test will read. Get it repaired first. Call us and we will tell you straight rather than book a visit that cannot pass.
I passed my test but DMV still won't give me tags. Why?
Passing the test is one of three things CARB needs. The vehicle has to be reported in CTC-VIS, the annual compliance fee has to be paid there, and a credentialed tester has to submit a passing result. The fee is what catches almost everyone — it is $32.13 per vehicle for 2026 and it can only be paid in CTC-VIS. See the three steps in order.
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 a photo of your registration 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.
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 a photo of your registration and we'll tell you what's likely 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.
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 Us Now Request a Callback
Or email danny@aplusctc.com
Don't let a deadline sneak up

Get CARB deadline reminders by email

Drop your email and we'll send compliance heads-ups and let you know when we're testing in your area — so you can plan testing before your deadlines. English or Spanish. No spam, unsubscribe anytime.

Prefer to talk? Call 530-378-9111
Your compliance is our priority — 530-378-9111

Need help with your CARB account?
Use CTC-VIS for vehicle reporting, annual fees, deadlines and compliance status. CARB support is separate from A+ Plus testing.

Open CARB portal (CTC-VIS)CARB helpline: 866-634-3735A+ Plus testing: 530-378-9111Send A+ Plus a message
Call 530-378-9111 Text