---
title: "Diesel Injection Service1 — Clean Truck Check, Fontana, CA"
description: "Diesel Injection Service1 in Fontana, CA is on CARB's Clean Truck Check tester list with 3 credentialed testers. Offers mobile testing, OBD testing, smoke…"
url: "https://ctcfinder.com/tester/diesel-injection-service1-fontana/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Diesel Injection Service1

Clean Truck Check tester in Fontana, 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 | 8482 Cherry Ave, Fontana, CA 92335 |
| County | San Bernardino County |
| Phone | (909) 213-5556 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 3 |
| Last verified | 2026-11-01 |

## Which trucks Diesel Injection Service1 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

Diesel Injection Service1 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 Fontana itself there are 49 listed businesses, 37 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 Diesel Injection Service1 offer mobile Clean Truck Check testing?

Yes. Diesel Injection Service1 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 Diesel Injection Service1 test a 2012 or older diesel truck?

Yes. Diesel Injection Service1 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 Diesel Injection Service1 charge for a Clean Truck Check?

Diesel Injection Service1 has not published prices with us; call (909) 213-5556 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 Diesel Injection Service1 a CARB-credentialed tester?

Diesel Injection Service1 appears on CARB's public Clean Truck Check tester list with 3 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

- **[Big Truck & Equipment Sales](https://ctcfinder.com/tester/big-truck-and-equipment-sales-fontana/)** — 14557 Randall Ave, Fontana, CA 92335 — (562) 665-0536 — 1 mi. Services: OBD testing.
- **[Big Truck & Equipment Sales LLC](https://ctcfinder.com/tester/big-truck-and-equipment-sales-llc-fontana/)** — 14557 Randall Ave, Fontana, CA 92335 — (909) 600-7555 — 1 mi. Services: OBD testing, smoke opacity (non-OBD) testing.
- **[Cintia Garcia](https://ctcfinder.com/tester/cintia-garcia-fontana/)** — Fontana, CA 92335 — (909) 642-5075 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[Cortez Registration Service](https://ctcfinder.com/tester/cortez-registration-service-fontana/)** — 16846 Merrill Ave Ste 213, Fontana, CA 92335 — (909) 275-3375 — 1 mi. Services: mobile testing, OBD testing.
- **[Custom Truck One Source](https://ctcfinder.com/tester/custom-truck-one-source-fontana/)** — 14670 Randall Ave, Fontana, CA 92335 — (909) 835-2270 — 1 mi. Services: mobile testing, OBD testing.
- **[Danny or Rush Soberano or Rush](https://ctcfinder.com/tester/danny-or-rush-soberano-or-rush-fontana/)** — 14315 Valley Blvd, Fontana, CA 92335 — (909) 919-0319 — 1 mi. Services: mobile testing, OBD testing.