---
title: "Isco Machinery — Clean Truck Check, Acton, CA | CTC Finder"
description: "Isco Machinery in Acton, CA is on CARB's Clean Truck Check tester list.  Phone, address and nearby testers."
url: "https://ctcfinder.com/tester/isco-machinery-acton/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Isco Machinery

Clean Truck Check tester in Acton, 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 | Acton, CA 93510 |
| County | Los Angeles County |
| Phone | (661) 941-6266 |
| Mobile testing | No |
| OBD testing | No |
| Smoke opacity (non-OBD) | No |
| Motorhomes | No |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Isco Machinery can test

| Your vehicle | Test required | This tester |
|---|---|---|
| Diesel, model year 2013 or newer | OBD scan | Not listed |
| Alternative fuel (natural gas, propane), 2018 or newer | OBD scan | Not listed |
| 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 Eric Cespedes in Acton, about 1 mile away. [See listing](https://ctcfinder.com/tester/eric-cespedes-acton/).

If you need a tester at your yard, the nearest listed tester that offers mobile testing is Acton 76 in Acton, about 1 mile away. [See listing](https://ctcfinder.com/tester/acton-76-acton/).

## Clean Truck Check testers in Los Angeles County

Isco Machinery 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. In Acton itself there are 3 listed businesses, 2 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 Isco Machinery offer mobile Clean Truck Check testing?

Not according to CARB's tester list; plan to bring the truck to the tester. The nearest listed mobile tester is [Acton 76](https://ctcfinder.com/tester/acton-76-acton/) (about 1 mile).

### Can Isco Machinery test a 2012 or older diesel truck?

Isco Machinery does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Eric Cespedes](https://ctcfinder.com/tester/eric-cespedes-acton/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does Isco Machinery charge for a Clean Truck Check?

Isco Machinery has not published prices with us; call (661) 941-6266 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 Isco Machinery a CARB-credentialed tester?

Isco Machinery 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

- **[Acton 76](https://ctcfinder.com/tester/acton-76-acton/)** — 3807 Sierra Hwy, Acton, CA 93510 — (661) 317-3500 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Eric Cespedes](https://ctcfinder.com/tester/eric-cespedes-acton/)** — Acton, CA 93510 — (818) 612-9569 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Kamori English](https://ctcfinder.com/tester/kamori-english-palmdale/)** — Palmdale, CA 93551 — (818) 422-3871 — 10 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Ricardo Martinez](https://ctcfinder.com/tester/ricardo-martinez-palmdale/)** — Palmdale, CA 93551 — (323) 393-7399 — 10 mi. Services: not listed.
- **[FleetFox](https://ctcfinder.com/tester/fleetfox-tujunga/)** — 10714 Tinker Ave, Tujunga, CA 91042 — (818) 804-8153 — 10 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Classic Smog Test Only](https://ctcfinder.com/tester/classic-smog-test-only-palmdale/)** — 37925 Sierra Hwy Ste K, Palmdale, CA 93550 — (818) 625-2888 — 10 mi. Services: mobile testing, OBD testing, motorhome testing.