Mobile Diesel Emissions Testing Inc
Clean Truck Check tester in Loomis, CA (Placer County).
- Mobile testing
- OBD test
- Smoke opacity
- Motorhomes
Mobile Diesel Emissions Testing Inc appears on CARB's public list of credentialed Clean Truck Check testers with 2 credentialed testers at this business. It lists mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. Mobile testing means the tester can come to your yard or job site.
- Location
- 4010 Barton Rd, Loomis, CA 95650
- County
- Placer County
- Phone
- (916) 530-2525
- Mobile testing
- Yes — comes to your yard
- OBD testing
- Yes
- Smoke opacity (non-OBD)
- Yes
- Motorhomes
- Yes
- Credentialed testers
- 2
- Last verified
Call (916) 530-2525 Open in Google Maps
Before you call
- Have your VIN, odometer reading and plate number ready.
- Your vehicle must be registered in CTC-VIS and the annual compliance fee paid; the tester submits the result to CARB.
- Ask for the price per vehicle and any mobile trip fee. Typical published prices for an OBD test are $50–$135 per vehicle (see cost guide).
Which trucks Mobile Diesel Emissions Testing Inc can test
The test CARB requires depends on the engine's fuel and model year. Based on the services Mobile Diesel Emissions Testing Inc lists on CARB's tester list:
| 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 Placer County
Mobile Diesel Emissions Testing Inc is one of 39 testing businesses in Placer County on CARB's public tester list. 36 of them offer mobile testing and 22 do smoke opacity tests. All testers in Placer County.
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. You can test up to 90 days before a deadline. Get a free email reminder before each one.
How to check a tester's credential
CARB publishes its Clean Truck Check tester list, where Mobile Diesel Emissions Testing Inc appears as of November 1, 2026. Listing there is optional, so a missing name does not always mean a tester is not credentialed. After the test, check that the passing result shows for your vehicle in CTC-VIS; that is what counts for compliance.
Frequently asked questions
Does Mobile Diesel Emissions Testing Inc offer mobile Clean Truck Check testing?
Yes. Mobile Diesel Emissions Testing Inc 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 Mobile Diesel Emissions Testing Inc test a 2012 or older diesel truck?
Yes. Mobile Diesel Emissions Testing Inc lists smoke opacity testing, the test CARB requires for diesel trucks of model year 2012 and older (no OBD). See OBD vs smoke opacity.
How much does Mobile Diesel Emissions Testing Inc charge for a Clean Truck Check?
Mobile Diesel Emissions Testing Inc has not published prices with us; call (916) 530-2525 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.
Is Mobile Diesel Emissions Testing Inc a CARB-credentialed tester?
Mobile Diesel Emissions Testing Inc appears on CARB's public Clean Truck Check tester list with 2 credentialed testers, 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 near Loomis
-
Tony Chen- Loomis, CA credentialed tester
- Mobile testing
- OBD test
- Smoke opacity
- Motorhomes
-
CARB Compliance Testing
- Mobile testing
- OBD test
- Smoke opacity
- Motorhomes
-
Dave's Clean Truck
- Mobile testing
- OBD test
- Smoke opacity
- Motorhomes
-
J4 Clean Truck Testing
- Mobile testing
- OBD test
-
Credentialed tester in Rocklin
- Mobile testing
- OBD test
- Smoke opacity
- Motorhomes
-
Motorhome/Truck test
- Mobile testing
- OBD test
- Smoke opacity
- Motorhomes
Source: CARB's public Clean Truck Check tester list, last checked . Listing on CARB's list is optional for testers, so some credentialed testers are not shown. Services, hours and prices change; please confirm with the tester before you go. Something wrong? Send a correction.