---
title: "Lawrence Woo — Clean Truck Check, Lincoln, CA | CTC Finder"
description: "Lawrence Woo in Lincoln, CA is on CARB's Clean Truck Check tester list. Offers OBD testing. Phone, address and nearby testers."
url: "https://ctcfinder.com/tester/lawrence-woo-lincoln/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Lawrence Woo

Clean Truck Check tester in Lincoln, CA (Placer 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 | Lincoln, CA 95648 |
| County | Placer County |
| Phone | (415) 269-0884 |
| Mobile testing | No |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | No |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Lawrence Woo 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 | Not listed |

For a 2012 or older diesel, the nearest listed tester with smoke opacity testing is Capital City Diesel Inspections- TRUCK, BUS, RV in Lincoln, about 1 mile away. [See listing](https://ctcfinder.com/tester/capital-city-diesel-inspections-truck-bus-rv-lincoln/).

If you need a tester at your yard, the nearest listed tester that offers mobile testing is Capital City Diesel Inspections- TRUCK, BUS, RV in Lincoln, about 1 mile away. [See listing](https://ctcfinder.com/tester/capital-city-diesel-inspections-truck-bus-rv-lincoln/).

## Clean Truck Check testers in Placer County

Lawrence Woo is one of 39 testing businesses in Placer County on CARB's public tester list. 36 of them offer mobile testing and 22 do smoke opacity tests. In Lincoln itself there are 4 listed businesses, 2 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 Lawrence Woo 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 [Capital City Diesel Inspections- TRUCK, BUS, RV](https://ctcfinder.com/tester/capital-city-diesel-inspections-truck-bus-rv-lincoln/) (about 1 mile).

### Can Lawrence Woo test a 2012 or older diesel truck?

Lawrence Woo does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Capital City Diesel Inspections- TRUCK, BUS, RV](https://ctcfinder.com/tester/capital-city-diesel-inspections-truck-bus-rv-lincoln/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does Lawrence Woo charge for a Clean Truck Check?

Lawrence Woo has not published prices with us; call (415) 269-0884 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 Lawrence Woo a CARB-credentialed tester?

Lawrence Woo 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

- **[Capital City Diesel Inspections- TRUCK, BUS, RV](https://ctcfinder.com/tester/capital-city-diesel-inspections-truck-bus-rv-lincoln/)** — 69 Lincoln Blvd, Lincoln, CA 95648 — (916) 538-7777 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[EcoEmissions Mobile](https://ctcfinder.com/tester/ecoemissions-mobile-lincoln/)** — 2793 Lindbergh Ln, Lincoln, CA 95648 — (916) 276-1953 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Sacramento Valley RV - Kevin Ewert](https://ctcfinder.com/tester/sacramento-valley-rv-kevin-ewert-lincoln/)** — 3130 Venture Dr. Ste 100, Lincoln, CA 95648 — (916) 807-4600 — 1 mi. Services: OBD testing, motorhome testing.
- **[Packs Water Truck Service INC](https://ctcfinder.com/tester/packs-water-truck-service-inc-sheridan/)** — 4585 Riosa Rd, Sheridan, CA 95681 — (916) 870-3740 — 6 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[CARByourRide](https://ctcfinder.com/tester/carbyourride-rocklin/)** — 6248 Arctic Loon Way, Rocklin, CA 95765 — (209) 598-8650 — 7 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Credentialed Tstr.](https://ctcfinder.com/tester/credentialed-tstr-rocklin/)** — Rocklin, CA 95765 — (916) 538-7777 — 7 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.