Tony Chen- Loomis, CA credentialed tester
Clean Truck Check tester in Loomis, CA (Placer County).
- Mobile testing
- OBD test
- Smoke opacity
- Motorhomes
Tony Chen- Loomis, CA credentialed tester appears on CARB's public list of credentialed Clean Truck Check testers. 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
- Loomis, CA 95650
- County
- Placer County
- Phone
- (916) 538-7777
- Website
- carbdieseltest.com
- Mobile testing
- Yes — comes to your yard
- OBD testing
- Yes
- Smoke opacity (non-OBD)
- Yes
- Motorhomes
- Yes
- Credentialed testers
- 1
- Last verified
Call (916) 538-7777 Open in Google Maps
The street address is not published for this listing (mobile or home-based tester). Call to arrange the test.
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 Tony Chen- Loomis, CA credentialed tester can test
The test CARB requires depends on the engine's fuel and model year. Based on the services Tony Chen- Loomis, CA credentialed tester 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
Tony Chen- Loomis, CA credentialed tester 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 Tony Chen- Loomis, CA credentialed tester 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 Tony Chen- Loomis, CA credentialed tester offer mobile Clean Truck Check testing?
Yes. Tony Chen- Loomis, CA credentialed tester 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 Tony Chen- Loomis, CA credentialed tester test a 2012 or older diesel truck?
Yes. Tony Chen- Loomis, CA credentialed tester 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 Tony Chen- Loomis, CA credentialed tester charge for a Clean Truck Check?
Tony Chen- Loomis, CA credentialed tester has not published prices with us; call (916) 538-7777 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 Tony Chen- Loomis, CA credentialed tester a CARB-credentialed tester?
Tony Chen- Loomis, CA credentialed tester 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 near Loomis
-
Mobile Diesel Emissions Testing Inc
- 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.