---
title: "Allen's Diesel OBD Carb testing — Clean Truck Check, Livermore, CA"
description: "Allen's Diesel OBD Carb testing in Livermore, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, motorhome testing. Phone…"
url: "https://ctcfinder.com/tester/allens-diesel-obd-carb-testing-livermore/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Allen's Diesel OBD Carb testing

Clean Truck Check tester in Livermore, CA (Alameda 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 | 185 N K St, Livermore, CA 94550 |
| County | Alameda County |
| Phone | (925) 382-1900 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Allen's Diesel OBD Carb testing 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 Mountain Cascade INC in Livermore, about 1 mile away. [See listing](https://ctcfinder.com/tester/mountain-cascade-inc-livermore/).

## Clean Truck Check testers in Alameda County

Allen's Diesel OBD Carb testing is one of 85 testing businesses in Alameda County on CARB's public tester list. 79 of them offer mobile testing and 37 do smoke opacity tests. In Livermore itself there are 8 listed businesses, 5 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 Allen's Diesel OBD Carb testing offer mobile Clean Truck Check testing?

Yes. Allen's Diesel OBD Carb testing 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 Allen's Diesel OBD Carb testing test a 2012 or older diesel truck?

Allen's Diesel OBD Carb testing does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Mountain Cascade INC](https://ctcfinder.com/tester/mountain-cascade-inc-livermore/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does Allen's Diesel OBD Carb testing charge for a Clean Truck Check?

Allen's Diesel OBD Carb testing has not published prices with us; call (925) 382-1900 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 Allen's Diesel OBD Carb testing a CARB-credentialed tester?

Allen's Diesel OBD Carb testing 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

- **[Mountain Cascade INC](https://ctcfinder.com/tester/mountain-cascade-inc-livermore/)** — 555 Exchange Ct, Livermore, CA 94550 — (209) 458-1113 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[All star smog](https://ctcfinder.com/tester/all-star-smog-tracy/)** — 3402 Mars Ct Suite 106, Tracy, CA 95377 — (209) 640-1524 — 11 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Bihala Fleet Management Inc](https://ctcfinder.com/tester/bihala-fleet-management-inc-tracy/)** — 205 Gandy Dancer Dr, Tracy, CA 95377 — (209) 884-7258 — 11 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Bret Cryer](https://ctcfinder.com/tester/bret-cryer-tracy/)** — Tracy, CA 95377 — (925) 922-5346 — 11 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Carb Compliance Checkers](https://ctcfinder.com/tester/carb-compliance-checkers-tracy/)** — 2609 Cranston Ct, Tracy, CA 95377 — (510) 378-8058 — 11 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Kutch Mobile Service](https://ctcfinder.com/tester/kutch-mobile-service-tracy/)** — 16866 Midway Rd, Tracy, CA 95377 — (925) 922-2327 — 11 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.