---
title: "Simon Hernandez — Clean Truck Check, Madera, CA | CTC Finder"
description: "Simon Hernandez in Madera, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, motorhome testing. Phone, address and nearby…"
url: "https://ctcfinder.com/tester/simon-hernandez-madera/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Simon Hernandez

Clean Truck Check tester in Madera, CA (Madera 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 | Madera, CA 93636 |
| County | Madera County |
| Phone | (559) 394-7733 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Simon Hernandez 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 24/7 Roadside in Madera, about 1 mile away. [See listing](https://ctcfinder.com/tester/24-7-roadside-madera/).

## Clean Truck Check testers in Madera County

Simon Hernandez is one of 22 testing businesses in Madera County on CARB's public tester list. 19 of them offer mobile testing and 6 do smoke opacity tests. In Madera itself there are 15 listed businesses, 12 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 Simon Hernandez offer mobile Clean Truck Check testing?

Yes. Simon Hernandez 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 Simon Hernandez test a 2012 or older diesel truck?

Simon Hernandez does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [24/7 Roadside](https://ctcfinder.com/tester/24-7-roadside-madera/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does Simon Hernandez charge for a Clean Truck Check?

Simon Hernandez has not published prices with us; call (559) 394-7733 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 Simon Hernandez a CARB-credentialed tester?

Simon Hernandez 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

- **[24/7 Roadside](https://ctcfinder.com/tester/24-7-roadside-madera/)** — 32001 Avenue 11 1/4, Madera, CA 93636 — (559) 708-9884 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[Clarks Performance](https://ctcfinder.com/tester/clarks-performance-madera/)** — 40101 Avenue 10, Madera, CA 93636 — (559) 706-9303 — 1 mi. Services: OBD testing, motorhome testing.
- **[Truckside Diesel Repair LLC](https://ctcfinder.com/tester/truckside-diesel-repair-llc-madera/)** — 17270 Karen Rd, Madera, CA 93636 — (559) 274-2056 — 1 mi. Services: mobile testing, OBD testing.
- **[Pintail Hauling LLC](https://ctcfinder.com/tester/pintail-hauling-llc-fresno/)** — 550 E Chesapeake Cir, Fresno, CA 93730 — (559) 287-0157 — 9 mi. Services: mobile testing, OBD testing.
- **[Cali Trucking Compliance](https://ctcfinder.com/tester/cali-trucking-compliance-madera/)** — 17534 Lane Dr, Madera, CA 93638 — (559) 716-8694 — 10 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Direct Diesel](https://ctcfinder.com/tester/direct-diesel-madera/)** — 28864 Rancho Ave, Madera, CA 93638 — (559) 647-7674 — 10 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.