---
title: "Clean Truck Check by JS — Clean Truck Check, Sylmar, CA"
description: "Clean Truck Check by JS in Sylmar, 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/clean-truck-check-by-js-sylmar/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Clean Truck Check by JS

Clean Truck Check tester in Sylmar, CA (Los Angeles 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 | 13608 Little Tujunga Canyon Rd, Sylmar, CA 91342 |
| County | Los Angeles County |
| Phone | (818) 259-9920 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Clean Truck Check by JS 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 Los Angeles County

Clean Truck Check by JS is one of 516 testing businesses in Los Angeles County on CARB's public tester list. 465 of them offer mobile testing and 190 do smoke opacity tests. In Sylmar itself there are 6 listed businesses, 6 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 Clean Truck Check by JS offer mobile Clean Truck Check testing?

Yes. Clean Truck Check by JS 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 Clean Truck Check by JS test a 2012 or older diesel truck?

Yes. Clean Truck Check by JS 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 Clean Truck Check by JS charge for a Clean Truck Check?

Clean Truck Check by JS has not published prices with us; call (818) 259-9920 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 Clean Truck Check by JS a CARB-credentialed tester?

Clean Truck Check by JS 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

- **[ALI Trucking Services](https://ctcfinder.com/tester/ali-trucking-services-sylmar/)** — 15036 Florentine St, Sylmar, CA 91342 — (818) 585-4959 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Engine Compliance](https://ctcfinder.com/tester/engine-compliance-sylmar/)** — 13553 Polk St, Sylmar, CA 91342 — (818) 400-3646 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[JM Diesel Repairs](https://ctcfinder.com/tester/jm-diesel-repairs-sylmar/)** — 14645 Polk St, Sylmar, CA 91342 — (909) 438-4353 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Reyes Truck Repair](https://ctcfinder.com/tester/reyes-truck-repair-sylmar/)** — 11360 Ruggiero Ave, Sylmar, CA 91342 — (818) 923-7285 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Unibilt Collision Center](https://ctcfinder.com/tester/unibilt-collision-center-sylmar/)** — 12051 Lopez Canyon Rd, Sylmar, CA 91342 — (818) 730-1770 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Champion DPF](https://ctcfinder.com/tester/champion-dpf-san-fernando/)** — San Fernando, CA 91340 — (661) 480-6299 — 4 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.