--- title: "Diamond valley automotive inc — Clean Truck Check, San Jacinto, CA" description: "Diamond valley automotive inc in San Jacinto, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, motorhome testing. Phone…" url: "https://ctcfinder.com/tester/diamond-valley-automotive-inc-san-jacinto/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Diamond valley automotive inc Clean Truck Check tester in San Jacinto, CA (Riverside County). > CTC Finder is an independent directory, not affiliated with CARB. Tester data: CARB Clean Truck Check public tester list, last checked November 1, 2026. Confirm services, hours and prices with the tester. | Field | Value | |---|---| | Location | 1685 S State St Ste C, San Jacinto, CA 92583 | | County | Riverside County | | Phone | (951) 432-8617 | | Mobile testing | Yes | | OBD testing | Yes | | Smoke opacity (non-OBD) | No | | Motorhomes | Yes | | Credentialed testers | 1 | | Last verified | 2026-11-01 | ## Which trucks Diamond valley automotive inc can test | 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 J&C Smog in San Jacinto, about 1 mile away. [See listing](https://ctcfinder.com/tester/j-and-c-smog-san-jacinto/). ## Clean Truck Check testers in Riverside County Diamond valley automotive inc is one of 251 testing businesses in Riverside County on CARB's public tester list. 233 of them offer mobile testing and 102 do smoke opacity tests. In San Jacinto itself there are 7 listed businesses, 7 of them mobile. ## 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](https://ctcfinder.com/guide/deadlines-2026-2027/). You can test up to 90 days before a deadline. Free email reminders: https://ctcfinder.com/reminders/ ## Frequently asked questions ### Does Diamond valley automotive inc offer mobile Clean Truck Check testing? Yes. Diamond valley automotive 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 Diamond valley automotive inc test a 2012 or older diesel truck? Diamond valley automotive inc does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [J&C Smog](https://ctcfinder.com/tester/j-and-c-smog-san-jacinto/) (about 1 mile). Trucks from 2013 on get an OBD scan instead. ### How much does Diamond valley automotive inc charge for a Clean Truck Check? Diamond valley automotive inc has not published prices with us; call (951) 432-8617 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](https://ctcfinder.com/guide/cost/). ### Is Diamond valley automotive inc a CARB-credentialed tester? Diamond valley automotive 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 nearby - **[J&C Smog](https://ctcfinder.com/tester/j-and-c-smog-san-jacinto/)** — 791 S San Jacinto Ave, San Jacinto, CA 92583 — (951) 634-6897 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Michael Eichling](https://ctcfinder.com/tester/michael-eichling-san-jacinto/)** — San Jacinto, CA 92583 — (918) 766-7436 — 1 mi. Services: mobile testing, OBD testing, motorhome testing. - **[A-Z Transport Tech LLC](https://ctcfinder.com/tester/a-z-transport-tech-llc-san-jacinto/)** — 1975 El Milagro Rd, San Jacinto, CA 92582 — (951) 570-3538 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing. - **[Central Diesel Fleet Union INC](https://ctcfinder.com/tester/central-diesel-fleet-union-inc-san-jacinto/)** — 650 S Grand Ave, San Jacinto, CA 92582 — (909) 272-5464 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Diesel Compliance Pro](https://ctcfinder.com/tester/diesel-compliance-pro-san-jacinto/)** — 2989 Crooked Branch Way, San Jacinto, CA 92582 — (626) 251-8944 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[First Choice Smog](https://ctcfinder.com/tester/first-choice-smog-san-jacinto/)** — 494 N Scovell Ave, San Jacinto, CA 92582 — (951) 327-3237 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.