Mark's Mobile Truck Serv., LLC
Clean Truck Check tester in Signal Hill, CA (Los Angeles County).
- Mobile testing
- OBD test
- Smoke opacity
- Motorhomes
Mark's Mobile Truck Serv., LLC 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
- 3348 Olive Ave, Signal Hill, CA 90755
- County
- Los Angeles County
- Phone
- (714) 345-5484
- Mobile testing
- Yes — comes to your yard
- OBD testing
- Yes
- Smoke opacity (non-OBD)
- Yes
- Motorhomes
- Yes
- Credentialed testers
- 1
- Last verified
Call (714) 345-5484 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 Mark's Mobile Truck Serv., LLC can test
The test CARB requires depends on the engine's fuel and model year. Based on the services Mark's Mobile Truck Serv., LLC 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 Los Angeles County
Mark's Mobile Truck Serv., LLC is one of 516 testing businesses in Los Angeles County on CARB's public tester list. 465 of them offer mobile testing and 190 do smoke opacity tests. In Signal Hill itself there are 3 listed businesses, 2 of them mobile. All testers in Los Angeles 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 Mark's Mobile Truck Serv., LLC 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 Mark's Mobile Truck Serv., LLC offer mobile Clean Truck Check testing?
Yes. Mark's Mobile Truck Serv., LLC 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 Mark's Mobile Truck Serv., LLC test a 2012 or older diesel truck?
Yes. Mark's Mobile Truck Serv., LLC 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 Mark's Mobile Truck Serv., LLC charge for a Clean Truck Check?
Mark's Mobile Truck Serv., LLC has not published prices with us; call (714) 345-5484 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 Mark's Mobile Truck Serv., LLC a CARB-credentialed tester?
Mark's Mobile Truck Serv., LLC 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 Signal Hill
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- OBD test
- Motorhomes
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Lan Logistics
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- Smoke opacity
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- OBD test
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-
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- OBD test
- Smoke opacity
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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.