---
title: "California Diesel Compliance Co — Clean Truck Check, San Diego, CA"
description: "California Diesel Compliance Co in San Diego, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD)…"
url: "https://ctcfinder.com/tester/california-diesel-compliance-co-san-diego/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# California Diesel Compliance Co

Clean Truck Check tester in San Diego, CA (San Diego 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 | 1985 Friendship Dr Ste L, San Diego, CA 92020 |
| County | San Diego County |
| Phone | (619) 449-4788 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks California Diesel Compliance Co 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 Diego County

California Diesel Compliance Co is one of 178 testing businesses in San Diego County on CARB's public tester list. 157 of them offer mobile testing and 91 do smoke opacity tests. In San Diego itself there are 42 listed businesses, 30 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 California Diesel Compliance Co offer mobile Clean Truck Check testing?

Yes. California Diesel Compliance Co 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 California Diesel Compliance Co test a 2012 or older diesel truck?

Yes. California Diesel Compliance Co 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 California Diesel Compliance Co charge for a Clean Truck Check?

California Diesel Compliance Co has not published prices with us; call (619) 449-4788 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 California Diesel Compliance Co a CARB-credentialed tester?

California Diesel Compliance Co 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

- **[Audra Friedland](https://ctcfinder.com/tester/audra-friedland-el-cajon/)** — El Cajon, CA 92020 — (619) 419-4380 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Bradley Automotive](https://ctcfinder.com/tester/bradley-automotive-el-cajon/)** — 210 W BRADLEY AVE C1, El Cajon, CA 92020 — (619) 403-2735 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Clean Truck Check Mobile](https://ctcfinder.com/tester/clean-truck-check-mobile-el-cajon/)** — 270 E Douglas Ave #49, El Cajon, CA 92020 — (619) 212-3743 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Esequiel Cervantes](https://ctcfinder.com/tester/esequiel-cervantes-el-cajon/)** — El Cajon, CA 92020 — (619) 268-7474 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Kurtis Meadows jackson](https://ctcfinder.com/tester/kurtis-meadows-jackson-el-cajon/)** — El Cajon, CA 92020 — (731) 499-6693 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[PurEmission Tech](https://ctcfinder.com/tester/puremission-tech-el-cajon/)** — 760 E Chase Ave, El Cajon, CA 92020 — (619) 201-6721 — 1 mi. Services: mobile testing, OBD testing.