---
title: "Jnava Mobile Opacity Inspections — Clean Truck Check, Merced, CA"
description: "Jnava Mobile Opacity Inspections in Merced, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD) testing…"
url: "https://ctcfinder.com/tester/jnava-mobile-opacity-inspections-merced/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Jnava Mobile Opacity Inspections

Clean Truck Check tester in Merced, CA (Merced 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 | 35 W Main St, Merced, CA 95340 |
| County | Merced County |
| Phone | (209) 226-2566 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Jnava Mobile Opacity Inspections 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 Merced County

Jnava Mobile Opacity Inspections is one of 40 testing businesses in Merced County on CARB's public tester list. 35 of them offer mobile testing and 12 do smoke opacity tests. In Merced itself there are 13 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 Jnava Mobile Opacity Inspections offer mobile Clean Truck Check testing?

Yes. Jnava Mobile Opacity Inspections 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 Jnava Mobile Opacity Inspections test a 2012 or older diesel truck?

Yes. Jnava Mobile Opacity Inspections 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 Jnava Mobile Opacity Inspections charge for a Clean Truck Check?

Jnava Mobile Opacity Inspections has not published prices with us; call (209) 226-2566 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 Jnava Mobile Opacity Inspections a CARB-credentialed tester?

Jnava Mobile Opacity Inspections 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

- **[Smith truck repair](https://ctcfinder.com/tester/smith-truck-repair-merced/)** — 15 W 15th St, Merced, CA 95340 — (209) 635-7917 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[VZ2](https://ctcfinder.com/tester/vz2-merced/)** — 3061 Marie Ct, Merced, CA 95340 — (209) 765-8438 — 1 mi. Services: mobile testing, OBD testing.
- **[Rodriguez Smog](https://ctcfinder.com/tester/rodriguez-smog-planada/)** — 9075 State Highway 140, Planada, CA 95365 — (209) 410-8544 — 5 mi. Services: mobile testing, OBD testing.
- **[Elmer Araujo](https://ctcfinder.com/tester/elmer-araujo-merced/)** — Merced, CA 95348 — (209) 230-3926 — 8 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[Lomeli’s Diagnostics](https://ctcfinder.com/tester/lomelis-diagnostics-merced/)** — 3568 Tammy Ct, Merced, CA 95348 — (209) 354-6680 — 8 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[MG Truck and Trailer](https://ctcfinder.com/tester/mg-truck-and-trailer-merced/)** — 646 Andrea Dr, Merced, CA 95348 — (209) 752-1084 — 8 mi. Services: mobile testing, OBD testing, motorhome testing.