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Clean Truck Check by Diesel Dynamix

October 20, 2026

How much does Clean Truck Check cost in California?

Clean Truck Check costs come in two parts: CARB’s annual compliance fee and the testing fee. Here is how to budget for both.

Short answer: Clean Truck Check has two costs: CARB’s annual compliance fee for each vehicle, paid in CTC-VIS, and the testing fee charged by the credentialed tester for each test. The exact CARB fee is set by CARB and shown in CTC-VIS.

What affects the testing price

  • Test type. OBD tests are usually faster than smoke opacity tests, which need a warm engine and a visual inspection.
  • Number of trucks. Fleets tested in one visit usually get a better per-truck price.
  • Location. Mobile testing saves you the driver’s time, fuel and a lost day of work, which often costs more than the test itself.

The hidden cost: downtime

Driving a truck to a test site can take half a day or more. Testing on-site at your yard keeps the truck earning. See mobile CARB testing.

Get a quote

Tell us how many trucks you have and where they are, and we will quote the visit. Book online or call (858) 342-8328.

Clean Truck Check cost vs the cost of falling behind

The cheapest Clean Truck Check is the one you do on time. A test costs money, but a non-compliant truck can cost more.

Here is what is at stake when a truck misses its deadline:

  • DMV registration hold for California-registered trucks, which can stop the truck from being renewed.
  • CARB citations and penalties. Amounts are set by CARB.
  • Lost work. A truck that cannot run legally does not earn, and some customers and ports check compliance status.

Testing on site also cuts the hidden costs. A driver taking a truck to a test site loses fuel and hours, and the truck is off the road. With mobile testing, the truck is tested where it parks and goes back to work.

A failed test adds a repair and a retest, so keeping check engine lights and emissions faults fixed between tests saves money too. The common causes are a lit check engine light, readiness monitors not set, DPF or emissions faults, and tampered or deleted equipment.

What to include when you ask for a quote

A clear request gets a clear price. Our testing price depends on three things: how many trucks, which test each one needs, and where they are.

Send us:

  1. Truck count. Fleets get per-truck pricing.
  2. Engine years and fuel types. These tell us the test type: OBD for 2013+ diesel and 2018+ alternative fuel, smoke opacity plus visual inspection for 2012 and older diesel without OBD, and visual inspection for older alternative fuel without OBD.
  3. Locations. One yard or several, and the city or area.
  4. Timing. Your deadlines and whether you need an early-morning visit.

Ask about retests up front, too, so you know what happens if a truck fails and needs to be tested again after a repair.

Remember that CARB's annual compliance fee is separate. You pay it to CARB in CTC-VIS, and the amount is shown there.

Get a quote by phone, text or WhatsApp at (858) 342-8328, or book online.

Questions

Frequently asked questions

Still unsure? Call or text (858) 342-8328 and we will help.

How much is a diesel smog check for a truck in California?

Clean Truck Check has two costs: CARB's annual compliance fee, shown in CTC-VIS, and the tester's fee for each test. Diesel Dynamix prices by truck count, test type and location.

Is CARB's compliance fee included in the testing price?

No. CARB's annual compliance fee is paid to CARB in CTC-VIS. The testing fee is separate and is charged by the tester.

Does a smoke opacity test cost more than an OBD test?

Price depends on the test type, and smoke opacity tests take longer because of warm-up and the visual inspection. Ask Diesel Dynamix for a quote based on your trucks.

Do you offer fleet pricing for Clean Truck Check?

Yes. Fleets get per-truck pricing based on truck count, test type and location. Call, text or WhatsApp (858) 342-8328 for a quote.

How much does a Clean Truck Check retest cost?

Retest pricing depends on the test type and location. Ask about retests when you request your quote so you know the cost before test day.

We come to you

Need your trucks tested?

One truck or an entire fleet, anywhere in Southern California. Book online, call or WhatsApp. We reply fast.

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