---
title: "Skylonda Equipment — Clean Truck Check, San Gregorio, CA"
description: "Skylonda Equipment in San Gregorio, 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/skylonda-equipment-san-gregorio/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Skylonda Equipment

Clean Truck Check tester in San Gregorio, CA (San Mateo 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 | 4446 LA Honda Rd, San Gregorio, CA 94074 |
| County | San Mateo County |
| Phone | (650) 868-0037 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Skylonda Equipment 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 Bay Area Clean Truck Check in Half Moon Bay, about 9 miles away. [See listing](https://ctcfinder.com/tester/bay-area-clean-truck-check-half-moon-bay/).

## Clean Truck Check testers in San Mateo County

Skylonda Equipment is one of 31 testing businesses in San Mateo County on CARB's public tester list. 27 of them offer mobile testing and 17 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 Skylonda Equipment offer mobile Clean Truck Check testing?

Yes. Skylonda Equipment 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 Skylonda Equipment test a 2012 or older diesel truck?

Skylonda Equipment does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Bay Area Clean Truck Check](https://ctcfinder.com/tester/bay-area-clean-truck-check-half-moon-bay/) (about 9 miles). Trucks from 2013 on get an OBD scan instead.

### How much does Skylonda Equipment charge for a Clean Truck Check?

Skylonda Equipment has not published prices with us; call (650) 868-0037 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 Skylonda Equipment a CARB-credentialed tester?

Skylonda Equipment 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

- **[Ron Ramies Inc](https://ctcfinder.com/tester/ron-ramies-inc-portola-valley/)** — 115 Portola Rd, Portola Valley, CA 94028 — (650) 400-2116 — 8 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Rolling Wrench Truck & Trailer Repair Inc.](https://ctcfinder.com/tester/rolling-wrench-truck-and-trailer-repair-inc-la-honda/)** — 23 Pope Rd, La Honda, CA 94020 — (650) 921-0487 — 8 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Bay Area Clean Truck Check](https://ctcfinder.com/tester/bay-area-clean-truck-check-half-moon-bay/)** — 551 San Mateo Rd, Half Moon Bay, CA 94019 — (650) 673-2000 — 9 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Balboni Electric](https://ctcfinder.com/tester/balboni-electric-redwood-city/)** — 823 Cleveland St, Redwood City, CA 94061 — (650) 766-4997 — 11 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Filthy Busters Inc.](https://ctcfinder.com/tester/filthy-busters-inc-redwood-city/)** — 1249 Sabrina Ct, Redwood City, CA 94061 — (510) 326-5901 — 11 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Carbcheck1](https://ctcfinder.com/tester/carbcheck1-san-carlos/)** — San Carlos, CA 94070 — (650) 430-3981 — 12 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.