---
title: "High Desert Mechanical Services — Clean Truck Check, Phelan, CA"
description: "High Desert Mechanical Services in Phelan, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD) testing…"
url: "https://ctcfinder.com/tester/high-desert-mechanical-services-phelan/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# High Desert Mechanical Services

Clean Truck Check tester in Phelan, CA (San Bernardino 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 | 5383 Duncan Rd, Phelan, CA 92371 |
| County | San Bernardino County |
| Phone | (909) 556-5413 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks High Desert Mechanical Services 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 San Bernardino County

High Desert Mechanical Services is one of 277 testing businesses in San Bernardino County on CARB's public tester list. 243 of them offer mobile testing and 98 do smoke opacity tests. In Phelan itself there are 3 listed businesses, 1 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 High Desert Mechanical Services offer mobile Clean Truck Check testing?

Yes. High Desert Mechanical Services 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 High Desert Mechanical Services test a 2012 or older diesel truck?

Yes. High Desert Mechanical Services 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 High Desert Mechanical Services charge for a Clean Truck Check?

High Desert Mechanical Services has not published prices with us; call (909) 556-5413 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 High Desert Mechanical Services a CARB-credentialed tester?

High Desert Mechanical Services 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

- **[Jacob LaCroix](https://ctcfinder.com/tester/jacob-lacroix-phelan/)** — Phelan, CA 92371 — (760) 822-4170 — 1 mi. Services: not listed.
- **[Phelan Express](https://ctcfinder.com/tester/phelan-express-phelan/)** — 9446 Sheep Creek Rd, Phelan, CA 92371 — (760) 868-4455 — 1 mi. Services: OBD testing, motorhome testing.
- **[Landmax Services LLC](https://ctcfinder.com/tester/landmax-services-llc-pinon-hills/)** — 515 Palmdale Rd, Pinon Hills, CA 92372 — (775) 990-2036 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Plan b auto repair](https://ctcfinder.com/tester/plan-b-auto-repair-pinon-hills/)** — 1820 Danbury Rd, Pinon Hills, CA 92372 — (626) 664-4558 — 5 mi. Services: mobile testing, OBD testing.
- **[Akaal](https://ctcfinder.com/tester/akaal-victorville/)** — 12350 Ojo Caliente St, Victorville, CA 92392 — (442) 229-3740 — 8 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Christine Shelton](https://ctcfinder.com/tester/christine-shelton-victorville/)** — Victorville, CA 92392 — (909) 277-1916 — 8 mi. Services: mobile testing, OBD testing.