---
title: "Patriot Diesel and Equipment — Clean Truck Check, Pioneer, CA"
description: "Patriot Diesel and Equipment in Pioneer, 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/patriot-diesel-and-equipment-pioneer/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Patriot Diesel and Equipment

Clean Truck Check tester in Pioneer, CA (Amador 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 | 22588 State Highway 88, Pioneer, CA 95666 |
| County | Amador County |
| Phone | (209) 256-5787 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Patriot Diesel and Equipment 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 Amador County

Patriot Diesel and Equipment is one of 7 testing businesses in Amador County on CARB's public tester list. 6 of them offer mobile testing and 4 do smoke opacity tests. In Pioneer itself there are 4 listed businesses, 4 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 Patriot Diesel and Equipment offer mobile Clean Truck Check testing?

Yes. Patriot Diesel and Equipment 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 Patriot Diesel and Equipment test a 2012 or older diesel truck?

Yes. Patriot Diesel and Equipment 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 Patriot Diesel and Equipment charge for a Clean Truck Check?

Patriot Diesel and Equipment has not published prices with us; call (209) 256-5787 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 Patriot Diesel and Equipment a CARB-credentialed tester?

Patriot Diesel and Equipment 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

- **[Campbell Forest](https://ctcfinder.com/tester/campbell-forest-pioneer/)** — Pioneer, CA 95666 — (209) 256-4662 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Dakotacal LLC](https://ctcfinder.com/tester/dakotacal-llc-pioneer/)** — 17019 Pine Needle Dr, Pioneer, CA 95666 — (209) 429-0940 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Mobile Carb Testing](https://ctcfinder.com/tester/mobile-carb-testing-pioneer/)** — 27382 State Highway 88, Pioneer, CA 95666 — (408) 406-7796 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Olson & Sons Industrial LLC](https://ctcfinder.com/tester/olson-and-sons-industrial-llc-pollock-pines/)** — 6520 Bandit Ct, Pollock Pines, CA 95726 — (530) 363-5651 — 16 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Robles Hard NOX](https://ctcfinder.com/tester/robles-hard-nox-pollock-pines/)** — Pollock Pines, CA 95726 — (530) 957-7313 — 16 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.