---
title: "Eduardo Monroy — Clean Truck Check, Signal Hill, CA"
description: "Eduardo Monroy in Signal Hill, 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/eduardo-monroy-signal-hill/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Eduardo Monroy

Clean Truck Check tester in Signal Hill, CA (Los Angeles 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 | Signal Hill, CA 90755 |
| County | Los Angeles County |
| Phone | (424) 373-2744 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Eduardo Monroy 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 Mark's Mobile Truck Serv., LLC in Signal Hill, about 1 mile away. [See listing](https://ctcfinder.com/tester/marks-mobile-truck-serv-llc-signal-hill/).

## Clean Truck Check testers in Los Angeles County

Eduardo Monroy is one of 516 testing businesses in Los Angeles County on CARB's public tester list. 465 of them offer mobile testing and 190 do smoke opacity tests. In Signal Hill itself there are 3 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 Eduardo Monroy offer mobile Clean Truck Check testing?

Yes. Eduardo Monroy 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 Eduardo Monroy test a 2012 or older diesel truck?

Eduardo Monroy does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Mark's Mobile Truck Serv., LLC](https://ctcfinder.com/tester/marks-mobile-truck-serv-llc-signal-hill/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does Eduardo Monroy charge for a Clean Truck Check?

Eduardo Monroy has not published prices with us; call (424) 373-2744 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 Eduardo Monroy a CARB-credentialed tester?

Eduardo Monroy 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

- **[Lan Logistics](https://ctcfinder.com/tester/lan-logistics-signal-hill/)** — 2828 Junipero Ave, Signal Hill, CA 90755 — (562) 237-2425 — 1 mi. Services: not listed.
- **[Mark's Mobile Truck Serv., LLC](https://ctcfinder.com/tester/marks-mobile-truck-serv-llc-signal-hill/)** — 3348 Olive Ave, Signal Hill, CA 90755 — (714) 345-5484 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[A&G](https://ctcfinder.com/tester/a-and-g-long-beach/)** — 631 E Burnett St #B, Long Beach, CA 90806 — (562) 388-3377 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[LA Smog](https://ctcfinder.com/tester/la-smog-long-beach/)** — 550 E Pacific Coast Hwy, Long Beach, CA 90806 — (562) 674-6873 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Long Beach Smog Pros](https://ctcfinder.com/tester/long-beach-smog-pros-long-beach/)** — 2160 Long Beach Boulevard B, Long Beach, CA 90806 — (562) 787-2225 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[System Maintenance](https://ctcfinder.com/tester/system-maintenance-long-beach/)** — 1335 East Spring Street, Long Beach, CA 90806 — (310) 629-3050 — 1 mi. Services: OBD testing, smoke opacity (non-OBD) testing, motorhome testing.