---
title: "AIRLIMITS-Denver — Clean Truck Check, Littleton, CO"
description: "AIRLIMITS-Denver in Littleton, CO is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome…"
url: "https://ctcfinder.com/tester/airlimits-denver-littleton-co/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# AIRLIMITS-Denver

Clean Truck Check tester in Littleton, CO.

> 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 | Littleton, CO 80123 |
| Phone | (800) 788-5241 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks AIRLIMITS-Denver 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 | Yes |
| California-registered motorhome | Same test as above by engine year, once a year | Yes |

## Clean Truck Check testers in Colorado

AIRLIMITS-Denver is one of 11 testing businesses in Colorado on CARB's public tester list. 9 of them offer mobile testing and 5 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 AIRLIMITS-Denver offer mobile Clean Truck Check testing?

Yes. AIRLIMITS-Denver 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 AIRLIMITS-Denver test a 2012 or older diesel truck?

Yes. AIRLIMITS-Denver lists smoke opacity testing, the test CARB requires for diesel trucks of model year 2012 and older (no OBD). See [OBD vs smoke opacity](https://ctcfinder.com/guide/obd-vs-smoke-opacity-test/).

### How much does AIRLIMITS-Denver charge for a Clean Truck Check?

AIRLIMITS-Denver has not published prices with us; call (800) 788-5241 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 AIRLIMITS-Denver a CARB-credentialed tester?

AIRLIMITS-Denver 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

- **[MA Cargo LLC](https://ctcfinder.com/tester/ma-cargo-llc-highlands-ranch-co/)** — 1745 Shea Center Dr Suite 400, Highlands Ranch, CO 80129 — (720) 829-2821 — 6 mi. Services: mobile testing, OBD testing.
- **[Jose luna ruiz](https://ctcfinder.com/tester/jose-luna-ruiz-denver-co/)** — Denver, CO 80216 — (720) 234-8268 — 13 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[LiViNa](https://ctcfinder.com/tester/livina-arvada-co/)** — 8298 Benton Way, Arvada, CO 80003 — (303) 819-7958 — 14 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Luna’s transportation](https://ctcfinder.com/tester/lunas-transportation-thornton-co/)** — Thornton, CO 80229 — (720) 234-8268 — 18 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Airlimits - Commerce City](https://ctcfinder.com/tester/airlimits-commerce-city-commerce-city-co/)** — Commerce City, CO 80022 — (800) 788-5241 — 23 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Sapp Bros 2301](https://ctcfinder.com/tester/sapp-bros-2301-commerce-city-co/)** — 7120 E 49th Ave, Commerce City, CO 80022 — (303) 289-3900 — 23 mi. Services: not listed.