---
title: "Nain Express — Clean Truck Check, Fresno, CA | CTC Finder"
description: "Nain Express in Fresno, CA is on CARB's Clean Truck Check tester list. Offers OBD testing, smoke opacity (non-OBD) testing. Phone, address and nearby testers."
url: "https://ctcfinder.com/tester/nain-express-fresno/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Nain Express

Clean Truck Check tester in Fresno, CA (Fresno County).

> CTC Finder is an independent directory, not affiliated with CARB. Tester data: CARB Clean Truck Check public tester list, last checked November 1, 2026. Confirm services, hours and prices with the tester.

| Field | Value |
|---|---|
| Location | 2212 N Marks Ave #109, Fresno, CA 93722 |
| County | Fresno County |
| Phone | (909) 657-1435 |
| Mobile testing | No |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | No |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Nain Express can test

| Your vehicle | Test required | This tester |
|---|---|---|
| Diesel, model year 2013 or newer | OBD scan | Yes |
| Alternative fuel (natural gas, propane), 2018 or newer | OBD scan | Yes |
| Diesel, model year 2012 or older (no OBD) | Smoke opacity test (SAE J1667) plus visual inspection | Yes |
| California-registered motorhome | Same test as above by engine year, once a year | Not listed |

If you need a tester at your yard, the nearest listed tester that offers mobile testing is A smog brothers in Fresno, about 1 mile away. [See listing](https://ctcfinder.com/tester/a-smog-brothers-fresno/).

## Clean Truck Check testers in Fresno County

Nain Express is one of 123 testing businesses in Fresno County on CARB's public tester list. 102 of them offer mobile testing and 47 do smoke opacity tests. In Fresno itself there are 74 listed businesses, 60 of them mobile.

## When your truck is due

Most trucks test twice a year, on a schedule tied to the DMV registration expiration date. CARB says OBD trucks move to four tests a year beginning October 2027. California-registered (non-commercial) motorhomes and agricultural vehicles test once a year. See the [deadline guide](https://ctcfinder.com/guide/deadlines-2026-2027/). You can test up to 90 days before a deadline. Free email reminders: https://ctcfinder.com/reminders/

## Frequently asked questions

### Does Nain Express offer mobile Clean Truck Check testing?

Not according to CARB's tester list; plan to bring the truck to the tester. The nearest listed mobile tester is [A smog brothers](https://ctcfinder.com/tester/a-smog-brothers-fresno/) (about 1 mile).

### Can Nain Express test a 2012 or older diesel truck?

Yes. Nain Express lists smoke opacity testing, the test CARB requires for diesel trucks of model year 2012 and older (no OBD). See [OBD vs smoke opacity](https://ctcfinder.com/guide/obd-vs-smoke-opacity-test/).

### How much does Nain Express charge for a Clean Truck Check?

Nain Express has not published prices with us; call (909) 657-1435 for a quote. Published California prices are usually $50–$135 per vehicle for an OBD test and $190–$200 for a smoke opacity test, plus CARB's annual fee ($32.13 in 2026). See the [cost guide](https://ctcfinder.com/guide/cost/).

### Is Nain Express a CARB-credentialed tester?

Nain Express appears on CARB's public Clean Truck Check tester list, last checked November 1, 2026. Only credentialed testers can submit results to CARB; after the test, confirm the passing result shows for your vehicle in CTC-VIS.

## Other testers nearby

- **[A smog brothers](https://ctcfinder.com/tester/a-smog-brothers-fresno/)** — 3285 W Belmont Ave, Fresno, CA 93722 — (559) 271-7645 — 1 mi. Services: mobile testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[AAA Inspections](https://ctcfinder.com/tester/aaa-inspections-fresno/)** — 2387 N Hanover Ave, Fresno, CA 93722 — (559) 705-4150 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[CK Truck & Trailer Repair INC](https://ctcfinder.com/tester/ck-truck-and-trailer-repair-inc-fresno/)** — 5249 N Cornelia Ave, Fresno, CA 93722 — (559) 916-8999 — 1 mi. Services: OBD testing, smoke opacity (non-OBD) testing.
- **[Cold Storage Technologies](https://ctcfinder.com/tester/cold-storage-technologies-fresno/)** — Fresno, CA 93722 — (559) 265-2637 — 1 mi. Services: mobile testing, OBD testing.
- **[D&A Mobile Service](https://ctcfinder.com/tester/d-and-a-mobile-service-fresno/)** — 2264 N Marks Ave #227, Fresno, CA 93722 — (509) 907-0028 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[DS Xpress INC.](https://ctcfinder.com/tester/ds-xpress-inc-fresno/)** — 3261 N Marks Ave, Fresno, CA 93722 — (209) 446-1192 — 1 mi. Services: mobile testing, OBD testing.