---
title: "DF Systems — Clean Truck Check, Torrance, CA | CTC Finder"
description: "DF Systems in Torrance, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing. Phone, address and nearby testers."
url: "https://ctcfinder.com/tester/df-systems-torrance/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# DF Systems

Clean Truck Check tester in Torrance, 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 | 2463 W 208th St Suite 203, Torrance, CA 90501 |
| County | Los Angeles County |
| Phone | (213) 309-4449 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | No |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks DF Systems 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 | Not listed |
| California-registered motorhome | Same test as above by engine year, once a year | Not listed |

For a 2012 or older diesel, the nearest listed tester with smoke opacity testing is MnKEIS in Torrance, about 1 mile away. [See listing](https://ctcfinder.com/tester/mnkeis-torrance/).

## Clean Truck Check testers in Los Angeles County

DF Systems 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 Torrance itself there are 11 listed businesses, 11 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 DF Systems offer mobile Clean Truck Check testing?

Yes. DF Systems 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 DF Systems test a 2012 or older diesel truck?

DF Systems does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [MnKEIS](https://ctcfinder.com/tester/mnkeis-torrance/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does DF Systems charge for a Clean Truck Check?

DF Systems has not published prices with us; call (213) 309-4449 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 DF Systems a CARB-credentialed tester?

DF Systems 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

- **[Anguiano clean truck](https://ctcfinder.com/tester/anguiano-clean-truck-torrance/)** — 21727 S Western Ave, Torrance, CA 90501 — (310) 222-8622 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[MnKEIS](https://ctcfinder.com/tester/mnkeis-torrance/)** — 1647 W 214th St, Torrance, CA 90501 — (310) 809-2791 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Myosha Lair](https://ctcfinder.com/tester/myosha-lair-torrance/)** — Torrance, CA 90501 — (424) 287-8303 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Rhiannon Grageda](https://ctcfinder.com/tester/rhiannon-grageda-torrance/)** — Torrance, CA 90501 — (424) 772-8948 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Eddy Morales](https://ctcfinder.com/tester/eddy-morales-torrance/)** — Torrance, CA 90503 — (310) 892-3697 — 2 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[IJN mobile diesel](https://ctcfinder.com/tester/ijn-mobile-diesel-torrance/)** — 3649 Garnet Street, Torrance, CA 90503 — (424) 318-7780 — 2 mi. Services: mobile testing, OBD testing, motorhome testing.