Allen's Diesel OBD Carb testing
Clean Truck Check tester in Livermore, CA (Alameda County).
- Mobile testing
- OBD test
- Motorhomes
Allen's Diesel OBD Carb testing appears on CARB's public list of credentialed Clean Truck Check testers. It lists mobile testing, OBD testing, motorhome testing. Mobile testing means the tester can come to your yard or job site.
- Location
- 185 N K St, Livermore, CA 94550
- County
- Alameda County
- Phone
- (925) 382-1900
- Mobile testing
- Yes — comes to your yard
- OBD testing
- Yes
- Smoke opacity (non-OBD)
- No
- Motorhomes
- Yes
- Credentialed testers
- 1
- Last verified
Call (925) 382-1900 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 Allen's Diesel OBD Carb testing can test
The test CARB requires depends on the engine's fuel and model year. Based on the services Allen's Diesel OBD Carb testing 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 | 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 Mountain Cascade INC in Livermore, about 1 mile away. See listing.
Clean Truck Check testers in Alameda County
Allen's Diesel OBD Carb testing is one of 85 testing businesses in Alameda County on CARB's public tester list. 79 of them offer mobile testing and 37 do smoke opacity tests. In Livermore itself there are 8 listed businesses, 5 of them mobile. All testers in Alameda 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 Allen's Diesel OBD Carb testing 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 Allen's Diesel OBD Carb testing offer mobile Clean Truck Check testing?
Yes. Allen's Diesel OBD Carb testing 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 Allen's Diesel OBD Carb testing test a 2012 or older diesel truck?
Allen's Diesel OBD Carb testing does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is Mountain Cascade INC (about 1 mile). Trucks from 2013 on get an OBD scan instead.
How much does Allen's Diesel OBD Carb testing charge for a Clean Truck Check?
Allen's Diesel OBD Carb testing has not published prices with us; call (925) 382-1900 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 Allen's Diesel OBD Carb testing a CARB-credentialed tester?
Allen's Diesel OBD Carb testing 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 Livermore
-
Mountain Cascade INC
- Mobile testing
- OBD test
- Smoke opacity
- Motorhomes
-
All star smog
- Mobile testing
- OBD test
- Smoke opacity
- Motorhomes
-
Bihala Fleet Management Inc
- Mobile testing
- OBD test
- Motorhomes
-
Bret Cryer
- Mobile testing
- OBD test
- Smoke opacity
- Motorhomes
-
Carb Compliance Checkers
- Mobile testing
- OBD test
- Motorhomes
-
Kutch Mobile Service
- 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.