---
title: "Mobile Diesel Emissions Testing Inc — Clean Truck Check, Loomis, CA"
description: "Mobile Diesel Emissions Testing Inc in Loomis, CA is on CARB's Clean Truck Check tester list with 2 credentialed testers. Offers mobile testing, OBD testing…"
url: "https://ctcfinder.com/tester/mobile-diesel-emissions-testing-inc-loomis/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Mobile Diesel Emissions Testing Inc

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 | 4010 Barton Rd, Loomis, CA 95650 |
| County | Placer County |
| Phone | (916) 530-2525 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 2 |
| Last verified | 2026-11-01 |

## Which trucks Mobile Diesel Emissions Testing Inc 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

Mobile Diesel Emissions Testing Inc 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 Mobile Diesel Emissions Testing Inc offer mobile Clean Truck Check testing?

Yes. Mobile Diesel Emissions Testing Inc 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 Mobile Diesel Emissions Testing Inc test a 2012 or older diesel truck?

Yes. Mobile Diesel Emissions Testing Inc 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 Mobile Diesel Emissions Testing Inc charge for a Clean Truck Check?

Mobile Diesel Emissions Testing Inc has not published prices with us; call (916) 530-2525 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 Mobile Diesel Emissions Testing Inc a CARB-credentialed tester?

Mobile Diesel Emissions Testing Inc appears on CARB's public Clean Truck Check tester list with 2 credentialed testers, 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

- **[Tony Chen- Loomis, CA credentialed tester](https://ctcfinder.com/tester/tony-chen-loomis-ca-credentialed-tester-loomis/)** — Loomis, CA 95650 — (916) 538-7777 — 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.