---
title: "Oso Clean Truck Checks — Clean Truck Check, Bakersfield, CA"
description: "Oso Clean Truck Checks in Bakersfield, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, motorhome testing. Phone, address and…"
url: "https://ctcfinder.com/tester/oso-clean-truck-checks-bakersfield/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Oso Clean Truck Checks

Clean Truck Check tester in Bakersfield, CA (Kern 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 | 8906 Rockefeller St, Bakersfield, CA 93311 |
| County | Kern County |
| Phone | (661) 444-3656 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Oso Clean Truck Checks 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 | Yes |

For a 2012 or older diesel, the nearest listed tester with smoke opacity testing is Third Eye Freight INC in Bakersfield, about 1 mile away. [See listing](https://ctcfinder.com/tester/third-eye-freight-inc-bakersfield/).

## Clean Truck Check testers in Kern County

Oso Clean Truck Checks is one of 107 testing businesses in Kern County on CARB's public tester list. 89 of them offer mobile testing and 53 do smoke opacity tests. In Bakersfield itself there are 78 listed businesses, 63 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 Oso Clean Truck Checks offer mobile Clean Truck Check testing?

Yes. Oso Clean Truck Checks 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 Oso Clean Truck Checks test a 2012 or older diesel truck?

Oso Clean Truck Checks does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Third Eye Freight INC](https://ctcfinder.com/tester/third-eye-freight-inc-bakersfield/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does Oso Clean Truck Checks charge for a Clean Truck Check?

Oso Clean Truck Checks has not published prices with us; call (661) 444-3656 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 Oso Clean Truck Checks a CARB-credentialed tester?

Oso Clean Truck Checks 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

- **[California CARB OBD Services](https://ctcfinder.com/tester/california-carb-obd-services-bakersfield/)** — 8904 Autumn Sunset Dr, Bakersfield, CA 93311 — (661) 808-0972 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Harkaranbir Bhullar](https://ctcfinder.com/tester/harkaranbir-bhullar-bakersfield/)** — Bakersfield, CA 93311 — (661) 808-5785 — 1 mi. Services: mobile testing, OBD testing.
- **[RJ Truck Repair](https://ctcfinder.com/tester/rj-truck-repair-bakersfield/)** — 8861 Houghton Rd, Bakersfield, CA 93311 — (661) 567-0020 — 1 mi. Services: mobile testing, OBD testing.
- **[Third Eye Freight INC](https://ctcfinder.com/tester/third-eye-freight-inc-bakersfield/)** — 7211 Brenthouse St, Bakersfield, CA 93311 — (661) 596-3328 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Anmol Vohra](https://ctcfinder.com/tester/anmol-vohra-bakersfield/)** — Bakersfield, CA 93313 — (661) 454-4806 — 7 mi. Services: not listed.
- **[B & B Registration](https://ctcfinder.com/tester/b-and-b-registration-bakersfield/)** — 3400 Panama Ln Ste J, Bakersfield, CA 93313 — (661) 832-5500 — 7 mi. Services: OBD testing.