---
title: "Foothill Automotive Services — Clean Truck Check, Monrovia, CA"
description: "Foothill Automotive Services in Monrovia, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, motorhome testing. Phone, address…"
url: "https://ctcfinder.com/tester/foothill-automotive-services-monrovia/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Foothill Automotive Services

Clean Truck Check tester in Monrovia, 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 | 150 East Pomona Avenue, Monrovia, CA 91016 |
| County | Los Angeles County |
| Phone | (626) 357-5015 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Foothill Automotive Services 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 Jarhead Fleet in Monrovia, about 1 mile away. [See listing](https://ctcfinder.com/tester/jarhead-fleet-monrovia/).

## Clean Truck Check testers in Los Angeles County

Foothill Automotive Services 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.

## 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 Foothill Automotive Services offer mobile Clean Truck Check testing?

Yes. Foothill Automotive Services 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 Foothill Automotive Services test a 2012 or older diesel truck?

Foothill Automotive Services does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Jarhead Fleet](https://ctcfinder.com/tester/jarhead-fleet-monrovia/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does Foothill Automotive Services charge for a Clean Truck Check?

Foothill Automotive Services has not published prices with us; call (626) 357-5015 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 Foothill Automotive Services a CARB-credentialed tester?

Foothill Automotive Services 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

- **[Jarhead Fleet](https://ctcfinder.com/tester/jarhead-fleet-monrovia/)** — 252 North Canyon Boulevard, Monrovia, CA 91016 — (626) 944-0618 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Arcadia Smog Test Only Center](https://ctcfinder.com/tester/arcadia-smog-test-only-center-arcadia/)** — 401 N 1st Ave, Arcadia, CA 91006 — (626) 447-1101 — 2 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Holloway Robert](https://ctcfinder.com/tester/holloway-robert-arcadia/)** — Arcadia, CA 91006 — (818) 805-7072 — 2 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Clear View Opacity testing](https://ctcfinder.com/tester/clear-view-opacity-testing-duarte/)** — 2620 Broderick Ave, Duarte, CA 91010 — (909) 906-8241 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Rayo’s Heavy Duty Testing](https://ctcfinder.com/tester/rayos-heavy-duty-testing-duarte/)** — 2191 Flagstone Ave, Duarte, CA 91010 — (626) 341-4482 — 3 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Brothers Truck N Trailer Repair Inc](https://ctcfinder.com/tester/brothers-truck-n-trailer-repair-inc-baldwin-park/)** — 14846 Arrow Hwy, Baldwin Park, CA 91706 — (626) 560-0890 — 4 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.