---
title: "Shawn Truong — Clean Truck Check, Lake Forest, CA"
description: "Shawn Truong in Lake Forest, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome…"
url: "https://ctcfinder.com/tester/shawn-truong-lake-forest/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Shawn Truong

Clean Truck Check tester in Lake Forest, CA (Orange 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 | Lake Forest, CA 92630 |
| County | Orange County |
| Phone | (714) 397-8025 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Shawn Truong 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 Orange County

Shawn Truong is one of 159 testing businesses in Orange County on CARB's public tester list. 146 of them offer mobile testing and 84 do smoke opacity tests. In Lake Forest itself there are 3 listed businesses, 2 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 Shawn Truong offer mobile Clean Truck Check testing?

Yes. Shawn Truong 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 Shawn Truong test a 2012 or older diesel truck?

Yes. Shawn Truong 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 Shawn Truong charge for a Clean Truck Check?

Shawn Truong has not published prices with us; call (714) 397-8025 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 Shawn Truong a CARB-credentialed tester?

Shawn Truong 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

- **[Acatrucking](https://ctcfinder.com/tester/acatrucking-lake-forest/)** — 22551 Overlake Dr, Lake Forest, CA 92630 — (626) 715-3763 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Elite Automotive Services](https://ctcfinder.com/tester/elite-automotive-services-lake-forest/)** — 26801 Vista Ter, Lake Forest, CA 92630 — (714) 319-5003 — 1 mi. Services: OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Hdquickcheck](https://ctcfinder.com/tester/hdquickcheck-mission-viejo/)** — Mission Viejo, CA 92691 — (949) 538-8094 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Quality Smog](https://ctcfinder.com/tester/quality-smog-mission-viejo/)** — 26811 Trabuco Rd, Mission Viejo, CA 92691 — (949) 454-4195 — 3 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[CARB Compliance Tester](https://ctcfinder.com/tester/carb-compliance-tester-irvine/)** — Irvine, CA 92618 — (916) 753-6509 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Larry Backstrom](https://ctcfinder.com/tester/larry-backstrom-irvine/)** — Irvine, CA 92618 — (949) 309-3737 — 3 mi. Services: not listed.