---
title: "Connor Whiteford — Clean Truck Check, Santa Margarita, CA"
description: "Connor Whiteford in Santa Margarita, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, motorhome testing. Phone, address and…"
url: "https://ctcfinder.com/tester/connor-whiteford-santa-margarita/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Connor Whiteford

Clean Truck Check tester in Santa Margarita, CA (San Luis Obispo 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 | Santa Margarita, CA 93453 |
| County | San Luis Obispo County |
| Phone | (805) 441-3085 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Connor Whiteford 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 | Not listed |
| California-registered motorhome | Same test as above by engine year, once a year | Yes |

For a 2012 or older diesel, the nearest listed tester with smoke opacity testing is Am Pac Repair in San Luis Obispo, about 22 miles away. [See listing](https://ctcfinder.com/tester/am-pac-repair-san-luis-obispo/).

## Clean Truck Check testers in San Luis Obispo County

Connor Whiteford is one of 25 testing businesses in San Luis Obispo County on CARB's public tester list. 22 of them offer mobile testing and 9 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 Connor Whiteford offer mobile Clean Truck Check testing?

Yes. Connor Whiteford 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 Connor Whiteford test a 2012 or older diesel truck?

Connor Whiteford does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Am Pac Repair](https://ctcfinder.com/tester/am-pac-repair-san-luis-obispo/) (about 22 miles). Trucks from 2013 on get an OBD scan instead.

### How much does Connor Whiteford charge for a Clean Truck Check?

Connor Whiteford has not published prices with us; call (805) 441-3085 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 Connor Whiteford a CARB-credentialed tester?

Connor Whiteford 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

- **[Eduardo Garibay](https://ctcfinder.com/tester/eduardo-garibay-arroyo-grande/)** — Arroyo Grande, CA 93420 — (805) 723-4318 — 15 mi. Services: mobile testing, OBD testing.
- **[Christian Garcia Mendoza](https://ctcfinder.com/tester/christian-garcia-mendoza-nipomo/)** — Nipomo, CA 93444 — (805) 631-6334 — 21 mi. Services: mobile testing, OBD testing.
- **[Pacific Coast Diesel](https://ctcfinder.com/tester/pacific-coast-diesel-nipomo/)** — 225 N Oak Glen Ave, Nipomo, CA 93444 — (805) 266-0253 — 21 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Troesh Recycling (Tester)](https://ctcfinder.com/tester/troesh-recycling-tester-nipomo/)** — 2280 Hutton Rd, Nipomo, CA 93444 — (805) 357-2288 — 21 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Rodriguez Truck Repair](https://ctcfinder.com/tester/rodriguez-truck-repair-santa-maria/)** — 1912 Prell Rd, Santa Maria, CA 93454 — (805) 863-7648 — 22 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Am Pac Repair](https://ctcfinder.com/tester/am-pac-repair-san-luis-obispo/)** — 4149 Santa Fe Rd Suite 8, San Luis Obispo, CA 93401 — (805) 459-4724 — 22 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.