---
title: "Diesel Check Emission Testing — Clean Truck Check, Daly City, CA"
description: "Diesel Check Emission Testing in Daly City, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD) testing…"
url: "https://ctcfinder.com/tester/diesel-check-emission-testing-daly-city/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Diesel Check Emission Testing

Clean Truck Check tester in Daly City, CA (San Mateo 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 | 6844 Mission St #401, Daly City, CA 94014 |
| County | San Mateo County |
| Phone | (415) 756-5465 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Diesel Check Emission 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 | Yes |
| California-registered motorhome | Same test as above by engine year, once a year | Yes |

## Clean Truck Check testers in San Mateo County

Diesel Check Emission Testing is one of 31 testing businesses in San Mateo County on CARB's public tester list. 27 of them offer mobile testing and 17 do smoke opacity tests. In Daly City itself there are 4 listed businesses, 4 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 Diesel Check Emission Testing offer mobile Clean Truck Check testing?

Yes. Diesel Check Emission 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 Diesel Check Emission Testing test a 2012 or older diesel truck?

Yes. Diesel Check Emission Testing 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 Diesel Check Emission Testing charge for a Clean Truck Check?

Diesel Check Emission Testing has not published prices with us; call (415) 756-5465 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 Diesel Check Emission Testing a CARB-credentialed tester?

Diesel Check Emission 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

- **[B and A Bodyworks Towing INC](https://ctcfinder.com/tester/b-and-a-bodyworks-towing-inc-daly-city/)** — 454 Talbert St, Daly City, CA 94014 — (415) 793-4887 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Heavy Auto Health](https://ctcfinder.com/tester/heavy-auto-health-daly-city/)** — 355 Rio Verde St, Daly City, CA 94014 — (415) 439-9369 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Valid Huseynli](https://ctcfinder.com/tester/valid-huseynli-daly-city/)** — Daly City, CA 94015 — (206) 605-7576 — 2 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[A1 Mobile Clean Truck Check LLC](https://ctcfinder.com/tester/a1-mobile-clean-truck-check-llc-brisbane/)** — 350 Glen Park Way, Brisbane, CA 94005 — (415) 806-9121 — 2 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Mobile Golden State Emissions Testing South City](https://ctcfinder.com/tester/mobile-golden-state-emissions-testing-south-city-south-san-francisco/)** — 988 El Camino Real, South San Francisco, CA 94080 — (925) 354-4370 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Steve Eftimiou](https://ctcfinder.com/tester/steve-eftimiou-south-san-francisco/)** — South San Francisco, CA 94080 — (415) 716-3119 — 3 mi. Services: OBD testing, smoke opacity (non-OBD) testing.