---
title: "Tony Chen- Loomis, CA credentialed tester — Clean Truck Check, Loomis, CA"
description: "Tony Chen- Loomis, CA credentialed tester in Loomis, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD)…"
url: "https://ctcfinder.com/tester/tony-chen-loomis-ca-credentialed-tester-loomis/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Tony Chen- Loomis, CA credentialed tester

Clean Truck Check tester in Loomis, CA (Placer 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 | Loomis, CA 95650 |
| County | Placer County |
| Phone | (916) 538-7777 |
| Website | carbdieseltest.com |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Tony Chen- Loomis, CA credentialed tester 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 | Yes |

## Clean Truck Check testers in Placer County

Tony Chen- Loomis, CA credentialed tester is one of 39 testing businesses in Placer County on CARB's public tester list. 36 of them offer mobile testing and 22 do smoke opacity tests.

## 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 Tony Chen- Loomis, CA credentialed tester offer mobile Clean Truck Check testing?

Yes. Tony Chen- Loomis, CA credentialed tester says on CARB's tester list that it offers mobile testing, so it can come to your yard or job site. Ask about a trip fee when you call.

### Can Tony Chen- Loomis, CA credentialed tester test a 2012 or older diesel truck?

Yes. Tony Chen- Loomis, CA credentialed tester 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 Tony Chen- Loomis, CA credentialed tester charge for a Clean Truck Check?

Tony Chen- Loomis, CA credentialed tester has not published prices with us; call (916) 538-7777 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 Tony Chen- Loomis, CA credentialed tester a CARB-credentialed tester?

Tony Chen- Loomis, CA credentialed tester 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

- **[Mobile Diesel Emissions Testing Inc](https://ctcfinder.com/tester/mobile-diesel-emissions-testing-inc-loomis/)** — 4010 Barton Rd, Loomis, CA 95650 — (916) 530-2525 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[CARB Compliance Testing](https://ctcfinder.com/tester/carb-compliance-testing-rocklin/)** — Rocklin, CA 95677 — (916) 538-7777 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Dave's Clean Truck](https://ctcfinder.com/tester/daves-clean-truck-rocklin/)** — 4188 Lakeside Dr, Rocklin, CA 95677 — (279) 782-1851 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[J4 Clean Truck Testing](https://ctcfinder.com/tester/j4-clean-truck-testing-rocklin/)** — 5155 5th St, Rocklin, CA 95677 — (916) 365-1066 — 3 mi. Services: mobile testing, OBD testing.
- **[Credentialed tester in Rocklin](https://ctcfinder.com/tester/credentialed-tester-in-rocklin-rocklin/)** — 6518 Lonetree Blvd 2043, Rocklin, CA — (916) 243-5089 — 4 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Motorhome/Truck test](https://ctcfinder.com/tester/motorhome-truck-test-newcastle/)** — Newcastle, CA 95658 — (916) 243-5089 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.