---
title: "Mobile Wrenching — Clean Truck Check, Livermore, CA"
description: "Mobile Wrenching in Livermore, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, motorhome testing. Phone, address and nearby…"
url: "https://ctcfinder.com/tester/mobile-wrenching-livermore/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Mobile Wrenching

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 | 903 Ventura Ct, Livermore, CA 94551 |
| County | Alameda County |
| Phone | (925) 525-2673 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Mobile Wrenching 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 Aabco Automotive Repair in Livermore, about 1 mile away. [See listing](https://ctcfinder.com/tester/aabco-automotive-repair-livermore/).

## Clean Truck Check testers in Alameda County

Mobile Wrenching 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 Mobile Wrenching offer mobile Clean Truck Check testing?

Yes. Mobile Wrenching 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 Mobile Wrenching test a 2012 or older diesel truck?

Mobile Wrenching does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Aabco Automotive Repair](https://ctcfinder.com/tester/aabco-automotive-repair-livermore/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does Mobile Wrenching charge for a Clean Truck Check?

Mobile Wrenching has not published prices with us; call (925) 525-2673 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 Mobile Wrenching a CARB-credentialed tester?

Mobile Wrenching 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

- **[A1 Smog Center](https://ctcfinder.com/tester/a1-smog-center-livermore/)** — 3573 First St Suite E, Livermore, CA 94551 — (510) 584-8200 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Aabco Automotive Repair](https://ctcfinder.com/tester/aabco-automotive-repair-livermore/)** — 1200 Portola Ave, Livermore, CA 94551 — (510) 421-8872 — 1 mi. Services: OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Eric Khlaut](https://ctcfinder.com/tester/eric-khlaut-livermore/)** — Livermore, CA 94551 — (925) 206-2004 — 1 mi. Services: not listed.
- **[Mobile Golden State Emissions Testing](https://ctcfinder.com/tester/mobile-golden-state-emissions-testing-livermore/)** — 796 Laurel Dr, Livermore, CA 94551 — (925) 354-4370 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Vasco Quick Lube](https://ctcfinder.com/tester/vasco-quick-lube-livermore/)** — 1443 N Vasco Rd., Livermore, CA 94551 — (916) 417-7001 — 1 mi. Services: OBD testing, motorhome testing.
- **[Marcelo Mendoza](https://ctcfinder.com/tester/marcelo-mendoza-tracy/)** — Tracy, CA 95391 — (925) 352-0590 — 9 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.