---
title: "CTC Specialists — Clean Truck Check, Winchester, CA"
description: "CTC Specialists in Winchester, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome…"
url: "https://ctcfinder.com/tester/ctc-specialists-winchester/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# CTC Specialists

Clean Truck Check tester in Winchester, CA (Riverside 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 | 35197 Lantern Light Dr, Winchester, CA 92596 |
| County | Riverside County |
| Phone | (951) 422-2827 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks CTC Specialists 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 Riverside County

CTC Specialists is one of 251 testing businesses in Riverside County on CARB's public tester list. 233 of them offer mobile testing and 102 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 CTC Specialists offer mobile Clean Truck Check testing?

Yes. CTC Specialists 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 CTC Specialists test a 2012 or older diesel truck?

Yes. CTC Specialists 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 CTC Specialists charge for a Clean Truck Check?

CTC Specialists has not published prices with us; call (951) 422-2827 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 CTC Specialists a CARB-credentialed tester?

CTC Specialists 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

- **[Jjim Transportation](https://ctcfinder.com/tester/jjim-transportation-hemet/)** — Hemet, CA 92545 — (951) 492-8518 — 4 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Mag Clean Air Check](https://ctcfinder.com/tester/mag-clean-air-check-hemet/)** — 3473 Cougar Canyon Rd, Hemet, CA 92545 — (951) 665-0161 — 4 mi. Services: mobile testing, OBD testing.
- **[All Smogs](https://ctcfinder.com/tester/all-smogs-hemet/)** — Hemet, CA 92543 — (562) 396-6891 — 4 mi. Services: OBD testing.
- **[AP Smog](https://ctcfinder.com/tester/ap-smog-hemet/)** — 561 N Palm Ave, Hemet, CA 92543 — (951) 489-8279 — 4 mi. Services: mobile testing, OBD testing.
- **[Austin Remigio](https://ctcfinder.com/tester/austin-remigio-menifee/)** — Menifee, CA 92584 — (951) 460-0009 — 8 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Richard Jones](https://ctcfinder.com/tester/richard-jones-menifee/)** — Menifee, CA 92584 — (951) 208-8667 — 8 mi. Services: mobile testing, OBD testing, motorhome testing.