---
title: "A1 automotive — Clean Truck Check, Yreka, CA | CTC Finder"
description: "A1 automotive in Yreka, 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/a1-automotive-yreka/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# A1 automotive

Clean Truck Check tester in Yreka, CA (Siskiyou 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 | 201 E Oberlin Rd, Yreka, CA 96097 |
| County | Siskiyou County |
| Phone | (530) 340-2823 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | No |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks A1 automotive 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 Blake Burleigh in Hornbrook, about 12 miles away. [See listing](https://ctcfinder.com/tester/blake-burleigh-hornbrook/).

## Clean Truck Check testers in Siskiyou County

A1 automotive is one of 7 testing businesses in Siskiyou County on CARB's public tester list. 6 of them offer mobile testing and 4 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 A1 automotive offer mobile Clean Truck Check testing?

Yes. A1 automotive 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 A1 automotive test a 2012 or older diesel truck?

A1 automotive does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Blake Burleigh](https://ctcfinder.com/tester/blake-burleigh-hornbrook/) (about 12 miles). Trucks from 2013 on get an OBD scan instead.

### How much does A1 automotive charge for a Clean Truck Check?

A1 automotive has not published prices with us; call (530) 340-2823 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 A1 automotive a CARB-credentialed tester?

A1 automotive 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

- **[Blake Burleigh](https://ctcfinder.com/tester/blake-burleigh-hornbrook/)** — Hornbrook, CA 96044 — (530) 598-3555 — 12 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[MHE Parts and Repair Inc.](https://ctcfinder.com/tester/mhe-parts-and-repair-inc-montague/)** — 903 S 11th St, Montague, CA 96064 — (530) 905-0371 — 15 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Scott Valley Disposal Inc.](https://ctcfinder.com/tester/scott-valley-disposal-inc-fort-jones/)** — 11217 N State Highway 3, Fort Jones, CA 96032 — (530) 598-1188 — 20 mi. Services: OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Reliable Workforce Services](https://ctcfinder.com/tester/reliable-workforce-services-weed/)** — 20510 Big Springs Rd #A, Weed, CA 96094 — (530) 598-1625 — 23 mi. Services: mobile testing, OBD testing, motorhome testing.