---
title: "CalFleet — Clean Truck Check, Cotati, CA | CTC Finder"
description: "CalFleet in Cotati, CA is on CARB's Clean Truck Check tester list with 5 credentialed testers. Offers mobile testing, OBD testing, smoke opacity (non-OBD)…"
url: "https://ctcfinder.com/tester/calfleet-cotati/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# CalFleet

Clean Truck Check tester in Cotati, CA (Sonoma 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 | 7911 Redwood Dr Suite 131, Cotati, CA 94931 |
| County | Sonoma County |
| Phone | (707) 665-5710 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 5 |
| Last verified | 2026-11-01 |

## Which trucks CalFleet 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 Sonoma County

CalFleet is one of 28 testing businesses in Sonoma County on CARB's public tester list. 19 of them offer mobile testing and 14 do smoke opacity tests.

## 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 CalFleet offer mobile Clean Truck Check testing?

Yes. CalFleet 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 CalFleet test a 2012 or older diesel truck?

Yes. CalFleet 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 CalFleet charge for a Clean Truck Check?

CalFleet has not published prices with us; call (707) 665-5710 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 CalFleet a CARB-credentialed tester?

CalFleet appears on CARB's public Clean Truck Check tester list with 5 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

- **[Alpha Fleet Solutions LLC](https://ctcfinder.com/tester/alpha-fleet-solutions-llc-cotati/)** — 141 Helman Ln, Cotati, CA 94931 — (707) 971-0514 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Chris Patterson](https://ctcfinder.com/tester/chris-patterson-santa-rosa/)** — Santa Rosa, CA 95407 — (707) 292-6644 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Donahue Truck Centers](https://ctcfinder.com/tester/donahue-truck-centers-santa-rosa/)** — 520 E Todd Rd, Santa Rosa, CA 95407 — (707) 975-5080 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Juan Torres](https://ctcfinder.com/tester/juan-torres-santa-rosa/)** — Santa Rosa, CA 95407 — (707) 321-1951 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Karamjit Singh Kaleka](https://ctcfinder.com/tester/karamjit-singh-kaleka-santa-rosa/)** — Santa Rosa, CA 95407 — (510) 565-2401 — 5 mi. Services: not listed.
- **[Lovepreet Singh](https://ctcfinder.com/tester/lovepreet-singh-santa-rosa/)** — Santa Rosa, CA 95407 — (707) 623-0393 — 5 mi. Services: OBD testing, smoke opacity (non-OBD) testing, motorhome testing.