---
title: "Norcal CARB Check Diesel Testing — Clean Truck Check, San Jose, CA"
description: "Norcal CARB Check Diesel Testing in San Jose, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD)…"
url: "https://ctcfinder.com/tester/norcal-carb-check-diesel-testing-san-jose/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Norcal CARB Check Diesel Testing

Clean Truck Check tester in San Jose, CA (Santa Clara 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 | San Jose, CA 95127 |
| County | Santa Clara County |
| Phone | (408) 843-0703 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Norcal CARB Check Diesel 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 Santa Clara County

Norcal CARB Check Diesel Testing is one of 79 testing businesses in Santa Clara County on CARB's public tester list. 67 of them offer mobile testing and 27 do smoke opacity tests. In San Jose itself there are 41 listed businesses, 36 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 Norcal CARB Check Diesel Testing offer mobile Clean Truck Check testing?

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

Yes. Norcal CARB Check Diesel 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 Norcal CARB Check Diesel Testing charge for a Clean Truck Check?

Norcal CARB Check Diesel Testing has not published prices with us; call (408) 843-0703 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 Norcal CARB Check Diesel Testing a CARB-credentialed tester?

Norcal CARB Check Diesel 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

- **[Auto City Reg](https://ctcfinder.com/tester/auto-city-reg-san-jose/)** — 3148 Alum Rock Ave, San Jose, CA 95127 — (408) 489-3215 — 1 mi. Services: not listed.
- **[Big RIG Smog](https://ctcfinder.com/tester/big-rig-smog-san-jose/)** — 14185 Story Rd, San Jose, CA 95127 — (408) 514-8093 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[BZ Truck Smog](https://ctcfinder.com/tester/bz-truck-smog-san-jose/)** — 4025 Holly Dr, San Jose, CA 95127 — (408) 717-2865 — 1 mi. Services: mobile testing, OBD testing.
- **[GX2](https://ctcfinder.com/tester/gx2-san-jose/)** — 4353 Hyland Ave, San Jose, CA 95127 — (909) 522-0984 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Raju Trucking INC](https://ctcfinder.com/tester/raju-trucking-inc-san-jose/)** — 275 Pala Ave, San Jose, CA 95127 — (408) 250-6643 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Sonny Ramirez](https://ctcfinder.com/tester/sonny-ramirez-san-jose/)** — San Jose, CA 95127 — (408) 409-6135 — 1 mi. Services: mobile testing, OBD testing.