Mor-Jon, Inc
Clean Truck Check tester in Crescent City, CA (Del Norte County).
- OBD test
- Smoke opacity
- Motorhomes
Mor-Jon, Inc appears on CARB's public list of credentialed Clean Truck Check testers. It lists OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- Location
- 137 E Washington Blvd, Crescent City, CA 95531
- County
- Del Norte County
- Phone
- (707) 464-4131
- Mobile testing
- No (test at the shop)
- OBD testing
- Yes
- Smoke opacity (non-OBD)
- Yes
- Motorhomes
- Yes
- Credentialed testers
- 1
- Last verified
Call (707) 464-4131 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. Typical published prices for an OBD test are $50–$135 per vehicle (see cost guide).
Which trucks Mor-Jon, Inc can test
The test CARB requires depends on the engine's fuel and model year. Based on the services Mor-Jon, 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 |
If you need a tester at your yard, the nearest listed tester that offers mobile testing is Hambro Waste Solution Group in Crescent City, about 1 mile away. See listing.
Clean Truck Check testers in Del Norte County
Mor-Jon, Inc is one of 3 testing businesses in Del Norte County on CARB's public tester list. 2 of them offer mobile testing and 2 do smoke opacity tests. In Crescent City itself there are 3 listed businesses, 2 of them mobile. All testers in Del Norte 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 Mor-Jon, 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 Mor-Jon, Inc offer mobile Clean Truck Check testing?
Not according to CARB's tester list; plan to bring the truck to the tester. The nearest listed mobile tester is Hambro Waste Solution Group (about 1 mile).
Can Mor-Jon, Inc test a 2012 or older diesel truck?
Yes. Mor-Jon, 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 Mor-Jon, Inc charge for a Clean Truck Check?
Mor-Jon, Inc has not published prices with us; call (707) 464-4131 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 Mor-Jon, Inc a CARB-credentialed tester?
Mor-Jon, Inc 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 Crescent City
-
Hambro Waste Solution Group
- Mobile testing
- OBD test
- Smoke opacity
-
Michael Vancott
- Mobile testing
- OBD test
- 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.