---
title: "Hector Kreitz — Clean Truck Check, Napa, CA | CTC Finder"
description: "Hector Kreitz in Napa, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing. Phone, address and nearby testers."
url: "https://ctcfinder.com/tester/hector-kreitz-napa/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Hector Kreitz

Clean Truck Check tester in Napa, CA (Napa 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 | Napa, CA 94558 |
| County | Napa County |
| Phone | (707) 704-9863 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | No |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Hector Kreitz 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 JB Mobile Service in Napa, about 1 mile away. [See listing](https://ctcfinder.com/tester/jb-mobile-service-napa/).

## Clean Truck Check testers in Napa County

Hector Kreitz is one of 11 testing businesses in Napa County on CARB's public tester list. 11 of them offer mobile testing and 6 do smoke opacity tests. In Napa itself there are 11 listed businesses, 11 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 Hector Kreitz offer mobile Clean Truck Check testing?

Yes. Hector Kreitz 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 Hector Kreitz test a 2012 or older diesel truck?

Hector Kreitz does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [JB Mobile Service](https://ctcfinder.com/tester/jb-mobile-service-napa/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does Hector Kreitz charge for a Clean Truck Check?

Hector Kreitz has not published prices with us; call (707) 704-9863 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 Hector Kreitz a CARB-credentialed tester?

Hector Kreitz 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

- **[JB Mobile Service](https://ctcfinder.com/tester/jb-mobile-service-napa/)** — 787 Airpark Rd, Napa, CA 94558 — (707) 206-5358 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[Napa Valley RV and Truck](https://ctcfinder.com/tester/napa-valley-rv-and-truck-napa/)** — 26 Big Leaf Ct, Napa, CA 94558 — (707) 850-6624 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Napa Valley Unified School District](https://ctcfinder.com/tester/napa-valley-unified-school-district-napa/)** — 1340 Menlo Ave, Napa, CA 94558 — (707) 492-0366 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[All Sacramento/Bay Area](https://ctcfinder.com/tester/all-sacramento-bay-area-vacaville/)** — Vacaville, CA 95688 — (916) 243-5089 — 9 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Brian Tierney](https://ctcfinder.com/tester/brian-tierney-vacaville/)** — Vacaville, CA 95688 — (707) 363-4083 — 9 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Buckners Truck Check](https://ctcfinder.com/tester/buckners-truck-check-vacaville/)** — 137 Suncrest Way, Vacaville, CA 95688 — (707) 828-4016 — 9 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.