---
title: "Robko Trucking — Clean Truck Check, Altadena, CA"
description: "Robko Trucking in Altadena, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome…"
url: "https://ctcfinder.com/tester/robko-trucking-altadena/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Robko Trucking

Clean Truck Check tester in Altadena, CA (Los Angeles 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 | 3050 Marengo Ave, Altadena, CA 91001 |
| County | Los Angeles County |
| Phone | (818) 581-5500 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Robko Trucking 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 Los Angeles County

Robko Trucking is one of 516 testing businesses in Los Angeles County on CARB's public tester list. 465 of them offer mobile testing and 190 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 Robko Trucking offer mobile Clean Truck Check testing?

Yes. Robko Trucking 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 Robko Trucking test a 2012 or older diesel truck?

Yes. Robko Trucking 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 Robko Trucking charge for a Clean Truck Check?

Robko Trucking has not published prices with us; call (818) 581-5500 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 Robko Trucking a CARB-credentialed tester?

Robko Trucking 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

- **[Nava's Transport Solutions](https://ctcfinder.com/tester/navas-transport-solutions-altadena/)** — 665 West Altadena Drive #25, Altadena, CA 91001 — (626) 268-1490 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Rolis Mobile Service](https://ctcfinder.com/tester/rolis-mobile-service-pasadena/)** — 2220 E Foothill Blvd, Pasadena, CA 91107 — (310) 757-2361 — 4 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Hill Smog](https://ctcfinder.com/tester/hill-smog-pasadena/)** — 248 N Hill Ave, Pasadena, CA 91106 — (626) 796-7609 — 4 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[GreenFleet Clean Truck Check](https://ctcfinder.com/tester/greenfleet-clean-truck-check-glendale/)** — 1990 Crestshire Drive, Glendale, CA 91208 — (818) 522-5562 — 6 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Ryan Fleet Service INC](https://ctcfinder.com/tester/ryan-fleet-service-inc-san-gabriel/)** — 8839 Arcadia Avenue, San Gabriel, CA 91775 — (626) 349-5623 — 6 mi. Services: mobile testing, OBD testing.
- **[C-los Mobile CARB Check](https://ctcfinder.com/tester/c-los-mobile-carb-check-los-angeles/)** — 620 East Redfield Avenue, Los Angeles, CA 90042 — (552) 774-6755 — 6 mi. Services: mobile testing, OBD testing, motorhome testing.