---
title: "West Caost Fleet Service — Clean Truck Check, Rancho Cucamonga, CA"
description: "West Caost Fleet Service in Rancho Cucamonga, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing. Phone, address and nearby…"
url: "https://ctcfinder.com/tester/west-caost-fleet-service-rancho-cucamonga/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# West Caost Fleet Service

Clean Truck Check tester in Rancho Cucamonga, 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 | 7245 Lion St, Rancho Cucamonga, CA 91701 |
| County | San Bernardino County |
| Phone | (909) 702-2462 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | No |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks West Caost Fleet Service 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 Express Bitz Inc in Rancho Cucamonga, about 1 mile away. [See listing](https://ctcfinder.com/tester/express-bitz-inc-rancho-cucamonga/).

## Clean Truck Check testers in San Bernardino County

West Caost Fleet Service 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 Rancho Cucamonga itself there are 18 listed businesses, 17 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 West Caost Fleet Service offer mobile Clean Truck Check testing?

Yes. West Caost Fleet Service 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 West Caost Fleet Service test a 2012 or older diesel truck?

West Caost Fleet Service does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Express Bitz Inc](https://ctcfinder.com/tester/express-bitz-inc-rancho-cucamonga/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does West Caost Fleet Service charge for a Clean Truck Check?

West Caost Fleet Service has not published prices with us; call (909) 702-2462 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 West Caost Fleet Service a CARB-credentialed tester?

West Caost Fleet Service 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

- **[Express Bitz Inc](https://ctcfinder.com/tester/express-bitz-inc-rancho-cucamonga/)** — 9031 Avalon St, Rancho Cucamonga, CA 91701 — (626) 848-7213 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[F&K Smog Services](https://ctcfinder.com/tester/f-and-k-smog-services-rancho-cucamonga/)** — Rancho Cucamonga, CA 91701 — (909) 224-8772 — 1 mi. Services: mobile testing, OBD testing.
- **[J-Tech Services Inc](https://ctcfinder.com/tester/j-tech-services-inc-rancho-cucamonga/)** — 7211 Haven Ave Ste E-591, Rancho Cucamonga, CA 91701 — (626) 672-5386 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[JS Clean Truck Check](https://ctcfinder.com/tester/js-clean-truck-check-rancho-cucamonga/)** — 7038 Kinlock Ave, Rancho Cucamonga, CA 91701 — (323) 789-9414 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Gerardo Franco](https://ctcfinder.com/tester/gerardo-franco-rancho-cucamonga/)** — Rancho Cucamonga, CA 91737 — (626) 255-1244 — 2 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Lucky Clean Truck Check](https://ctcfinder.com/tester/lucky-clean-truck-check-rancho-cucamonga/)** — 11610 Mount Rainier Ct, Rancho Cucamonga, CA 91737 — (909) 731-1966 — 2 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.