---
title: "Isaias Morfin — Clean Truck Check, Stockton, CA | CTC Finder"
description: "Isaias Morfin in Stockton, CA is on CARB's Clean Truck Check tester list. Offers OBD testing, smoke opacity (non-OBD) testing. Phone, address and nearby…"
url: "https://ctcfinder.com/tester/isaias-morfin-stockton/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Isaias Morfin

Clean Truck Check tester in Stockton, CA (San Joaquin 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 | Stockton, CA 95203 |
| County | San Joaquin County |
| Phone | (209) 623-5336 |
| Mobile testing | No |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | No |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Isaias Morfin 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 | Not listed |

If you need a tester at your yard, the nearest listed tester that offers mobile testing is Dave's Mobile Truck and Trailer Repair in Stockton, about 1 mile away. [See listing](https://ctcfinder.com/tester/daves-mobile-truck-and-trailer-repair-stockton/).

## Clean Truck Check testers in San Joaquin County

Isaias Morfin is one of 124 testing businesses in San Joaquin County on CARB's public tester list. 111 of them offer mobile testing and 53 do smoke opacity tests. In Stockton itself there are 50 listed businesses, 43 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 Isaias Morfin offer mobile Clean Truck Check testing?

Not according to CARB's tester list; plan to bring the truck to the tester. The nearest listed mobile tester is [Dave's Mobile Truck and Trailer Repair](https://ctcfinder.com/tester/daves-mobile-truck-and-trailer-repair-stockton/) (about 1 mile).

### Can Isaias Morfin test a 2012 or older diesel truck?

Yes. Isaias Morfin 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 Isaias Morfin charge for a Clean Truck Check?

Isaias Morfin has not published prices with us; call (209) 623-5336 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 Isaias Morfin a CARB-credentialed tester?

Isaias Morfin 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

- **[Dave's Mobile Truck and Trailer Repair](https://ctcfinder.com/tester/daves-mobile-truck-and-trailer-repair-stockton/)** — 1872 Shimizu Dr, Stockton, CA 95203 — (209) 922-5558 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Lucian Rosselli](https://ctcfinder.com/tester/lucian-rosselli-stockton/)** — Stockton, CA 95203 — (209) 696-0199 — 1 mi. Services: not listed.
- **[Mohammad Arshadi](https://ctcfinder.com/tester/mohammad-arshadi-stockton/)** — Stockton, CA 95203 — (916) 280-8902 — 1 mi. Services: mobile testing, OBD testing.
- **[Nick Payne](https://ctcfinder.com/tester/nick-payne-stockton/)** — Stockton, CA 95203 — (209) 981-7923 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[TriStar Smog STOCKTON InShop/Mobile WE TEST ALL](https://ctcfinder.com/tester/tristar-smog-stockton-inshop-mobile-we-test-all-stockton-2/)** — 347 S Commerce St, Stockton, CA 95203 — (209) 565-1173 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Golden Star Smog](https://ctcfinder.com/tester/golden-star-smog-stockton/)** — 4049 west lane, Stockton, CA 95204 — (209) 981-5142 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.