---
title: "Diesel Pollution Solutions — Clean Truck Check, Keyes, CA"
description: "Diesel Pollution Solutions in Keyes, 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-pollution-solutions-keyes/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Diesel Pollution Solutions

Clean Truck Check tester in Keyes, CA (Stanislaus 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 | 4928 Audra Ct, Keyes, CA 95328 |
| County | Stanislaus County |
| Phone | (760) 525-9435 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Diesel Pollution Solutions 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 Stanislaus County

Diesel Pollution Solutions is one of 53 testing businesses in Stanislaus County on CARB's public tester list. 47 of them offer mobile testing and 22 do smoke opacity tests.

## 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 Pollution Solutions offer mobile Clean Truck Check testing?

Yes. Diesel Pollution Solutions 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 Pollution Solutions test a 2012 or older diesel truck?

Yes. Diesel Pollution Solutions 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 Pollution Solutions charge for a Clean Truck Check?

Diesel Pollution Solutions has not published prices with us; call (760) 525-9435 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 Pollution Solutions a CARB-credentialed tester?

Diesel Pollution Solutions 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

- **[Ace smog](https://ctcfinder.com/tester/ace-smog-ceres/)** — 2500 Mary Ave, Ceres, CA 95307 — (209) 531-6823 — 2 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[All Star Auto Smog](https://ctcfinder.com/tester/all-star-auto-smog-ceres/)** — 1561 E Whitmore Ave, Ceres, CA 95307 — (209) 568-7833 — 2 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Guriqbal Chahal](https://ctcfinder.com/tester/guriqbal-chahal-ceres/)** — Ceres, CA 95307 — (209) 222-0705 — 2 mi. Services: mobile testing, OBD testing.
- **[ProMobile Fleet](https://ctcfinder.com/tester/promobile-fleet-ceres/)** — 991 Premier Dr, Ceres, CA 95307 — (209) 769-7925 — 2 mi. Services: mobile testing, OBD testing.
- **[Rangi Registration](https://ctcfinder.com/tester/rangi-registration-ceres/)** — 2904 4th St, Ceres, CA 95307 — (209) 480-6516 — 2 mi. Services: OBD testing.
- **[Solis Clean Truck Checks](https://ctcfinder.com/tester/solis-clean-truck-checks-ceres/)** — 4467 Faith Home Rd, Ceres, CA 95307 — (209) 996-3687 — 2 mi. Services: mobile testing, OBD testing.