--- title: "California Clean Truck Check: A Guide for Out-of-State Truckers" description: "Navigating California’s Clean Truck Check: A guide for out-of-state truckers to understand regulations and ensure compliance." image: https://sacvalleydieseltesting.com/hubfs/Screenshot%202024-12-18%20at%207.12.19%20PM.png --- [Skip to content](https://sacvalleydieseltesting.com/blog/california-clean-truck-check-a-guide-for-out-of-state-truckers#main-content) [![Screenshot 2025-02-18 at 10.34.07 PM](https://sacvalleydieseltesting.com/hs-fs/hubfs/Screenshot%202025-02-18%20at%2010.34.07%20PM.png?width=244&height=121&name=Screenshot%202025-02-18%20at%2010.34.07%20PM.png)](https://sacvalleydieseltesting.com) - [Home](https://sacvalleydieseltesting.com) - [About](https://sacvalleydieseltesting.com/carb-info) - [Blog](https://sacvalleydieseltesting.com/blog) - [FAQ](https://ww2.arb.ca.gov/our-work/programs/inspection-and-maintenance-program/hd-im-fact-sheets) - [Diesel Motorhomes](https://sacvalleydieseltesting.com/motorhome-carb-testing) Open main navigation Close main navigation - [Home](https://sacvalleydieseltesting.com) - [About](https://sacvalleydieseltesting.com/carb-info) - [Blog](https://sacvalleydieseltesting.com/blog) - [FAQ](https://ww2.arb.ca.gov/our-work/programs/inspection-and-maintenance-program/hd-im-fact-sheets) - [Diesel Motorhomes](https://sacvalleydieseltesting.com/motorhome-carb-testing) - [530-650-6646](tel:5306506646) [530-650-6646](tel:5306506646) [All posts](https://sacvalleydieseltesting.com/blog/all) December 19, 2024 # California Clean Truck Check: A Guide for Out-of-State Truckers By  Nathan Ament  ·  2 minute read ## **Navigating California’s Clean Truck Check: A Guide for Out-of-State Operators** **![Screenshot 2024-12-18 at 7.12.19 PM](https://sacvalleydieseltesting.com/hs-fs/hubfs/Screenshot%202024-12-18%20at%207.12.19%20PM.png?width=2046&height=1720&name=Screenshot%202024-12-18%20at%207.12.19%20PM.png)** If you’re an out-of-state trucker operating your heavy-duty diesel vehicle in California, you’re likely familiar with the California Air Resources Board (CARB) and its stringent emissions standards. One *key* program you need to be aware of is the California **Clean Truck Check**. ### **What is the Clean Truck Check?** The Clean Truck Check, also known as the CARB HD I/M program, is designed to ensure that heavy-duty diesel vehicles operating in California meet strict emissions standards. This program is essential for maintaining air quality and protecting public health. ### **Who Does it Apply To?** The Clean Truck Check applies to: - **All heavy-duty diesel vehicles (over 14,000 pounds GVWR)** operating in California. - **Out-of-state vehicles** that enter California for business or other activities. ### **Key Requirements of the Clean Truck Check:** 1. **Periodic Emissions Testing:** - **OBD Testing:** For 2013 and newer model year vehicles equipped with OBD systems. - **Smoke Opacity Testing:** For older vehicles (usually 2012 and older) without OBD systems. 2. **Compliance Reporting:** - Test results must be uploaded to CARB’s online system. - Testing frequency varies based on vehicle emissions profile and CARB regulations. 3. **Registration in CARB’s Database:** - Out-of-state vehicle owners must register their vehicles in CARB’s TRUCRS system. ### **Why Compliance Matters** Failure to comply with California’s emissions regulations can lead to: - **Significant fines** - **Vehicle impoundment** - **Loss of access to California’s highways** ### **Tips for Out-of-State Operators to Stay Compliant** 1. **Understand Your Vehicle’s Requirements:** Determine if your vehicle needs OBD or smoke opacity testing. 2. **Find a Certified Tester:** Locate a CARB-certified mobile or stationary tester. A great on for example is Sac Valley Mobile Diesel Testing, give them a call at 530-650-6646 to get your vehicle scheduled for a compliance test today.. 3. **Keep Accurate Records:** Maintain documentation of all tests and compliance reports. 4. **Plan Ahead:** Schedule tests well in advance to avoid delays and penalties. 5. **Monitor Deadlines:** Set reminders for testing and reporting deadlines. 6. **Consider Fleet Management Tools:** Use tools to track compliance for multiple vehicles. 7. **Be Aware of Local Regulations:** Some air quality districts may have additional requirements. 8. **Utilize Reciprocity Agreements:** Check if your home state has reciprocity agreements with California. ### **Where to Get Help** - **CARB’s Official Website:** Visit CARB’s HD I/M program page for the latest information. [ww2.arb.ca.gov/our-work/programs/CTC/about](https://ww2.arb.ca.gov/our-work/programs/CTC/about) - **Certified Mobile Testers:** Mobile testers can provide on-site services. - **Professional Compliance Consultants:** Consider hiring a consultant for expert guidance. By understanding the Clean Truck Check and taking proactive steps to comply, out-of-state truckers can ensure smooth operations in California while contributing to cleaner air.   [www.sacvalleymobiletesting.com](https://sacvalleydieseltesting.com/) ![Screenshot 2024-09-02 at 9.04.58 AM-1](https://sacvalleydieseltesting.com/hs-fs/hubfs/Screenshot%202024-09-02%20at%209.04.58%20AM-1.png?width=401&height=206&name=Screenshot%202024-09-02%20at%209.04.58%20AM-1.png)     Share [facebook-f icon](http://www.facebook.com/share.php?u=https://sacvalleydieseltesting.com/blog/california-clean-truck-check-a-guide-for-out-of-state-truckers) [linkedin-in icon](http://www.linkedin.com/shareArticle?mini=true&url=https://sacvalleydieseltesting.com/blog/california-clean-truck-check-a-guide-for-out-of-state-truckers) [twitter icon](https://twitter.com/intent/tweet?url=https://sacvalleydieseltesting.com/blog/california-clean-truck-check-a-guide-for-out-of-state-truckers) [pinterest-p icon](http://pinterest.com/pin/create/link/?url=https://sacvalleydieseltesting.com/blog/california-clean-truck-check-a-guide-for-out-of-state-truckers) [envelope icon](mailto:?body=https://sacvalleydieseltesting.com/blog/california-clean-truck-check-a-guide-for-out-of-state-truckers) [![](https://sacvalleydieseltesting.com/hs-fs/hubfs/Screenshot%202024-09-02%20at%209.04.58%20AM-1.png?width=444&height=228&name=Screenshot%202024-09-02%20at%209.04.58%20AM-1.png)](https://sacvalleydieseltesting.com/)   Learn more about the California Air Resources Board HD/IM Diesel Emissions Program that goes into effect this year by clicking on the links under Resources.       [facebook-f icon](https://www.facebook.com/profile.php?id=61570893532975) [linkedin-in icon](https://www.linkedin.com/company/106506390/admin/dashboard/) [youtube icon](https://youtu.be/mwR0TwFdHPU?si=uVxVAgoWq2lVix7B) instagram icon ## **Resources** [Clean Truck Check Website](https://ww2.arb.ca.gov/our-work/programs/CTC) [Truck Stop Videos - Including Spanish Versions](https://www.youtube.com/@carbtruckstop5804/videos) [CARB Motorhome FACT SHEET](https://ww2.arb.ca.gov/resources/fact-sheets/clean-truck-check-motorhome-fact-sheet) [The NEW Semi-Annual Testing Requirements](https://ww2.arb.ca.gov/clean-truck-check-requirements-vehicles-subject-semi-annual-compliance) [CARB info VIDEO](https://ww2.arb.ca.gov/our-work/programs/truckstop-resources/truckstop/training-course-clean-truck-check-hd-im-program) [Testing Twice A Year - Calendar](https://ww2.arb.ca.gov/clean-truck-check-requirements-vehicles-subject-semi-annual-compliance) [Vehicle Inspection System (CTC-VIS) Portal](https://cleantruckcheck.arb.ca.gov) [Database Reporting Instructions CTC-VIS](https://youtu.be/Zd1YaEBM-hE?si=KXFPV6TxuKQ6yM21) [DPF Maintenance](https://youtu.be/NB_dZTnhYTs?si=gC8S-TU8bzEdbekw) [Information About Selling a Vehicle](https://ww2.arb.ca.gov/resources/fact-sheets/dealer-fact-sheet-clean-truck-check) [Information About Clearning Codes](https://ww2.arb.ca.gov/board-diagnostic-obd-readiness-criteria) [Acceptable Smoke Levels For Smoke Tests](https://ww2.arb.ca.gov/sites/default/files/inline-images/Opacity%20%25s.png) [Missing Engine Label Information](https://ww2.arb.ca.gov/resources/fact-sheets/clean-truck-check-what-do-when-ecl-missingillegible) [Our Site Data Privacy Policy\*](https://www.freeprivacypolicy.com/live/4839b8f5-5648-436e-9a7c-d6f08e41b09e)   ![CTC_Testers_hrz-white](https://sacvalleydieseltesting.com/hubfs/CTC_Testers_hrz-white.svg "CTC_Testers_hrz-white") Information about CARB and HD/IM Program is subject to change, for the most accurate and up-to-date information go to the California Air Resouces Board Website                                                                                                                                                                                                                    Copyright © 2026, Sac Valley Mobile Diesel Testing ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Nathan Ament", "url" : "https://sacvalleydieseltesting.com/blog/author/nathan-ament" }, "dateModified" : "2024-12-19T03:19:56.662Z", "datePublished" : "2024-12-19T03:16:15.000Z", "headline" : "California Clean Truck Check: A Guide for Out-of-State Truckers", "image" : [ "https://sacvalleydieseltesting.com/hubfs/Screenshot%202024-12-18%20at%207.12.19%20PM.png" ], "mainEntityOfPage" : { "@id" : "https://sacvalleydieseltesting.com/blog/california-clean-truck-check-a-guide-for-out-of-state-truckers", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://sacvalleydieseltesting.com/hubfs/Screenshot%202024-09-02%20at%209.04.58%20AM-1.png" } } } ``` ```json { "@context" : "http://schema.org", "@type" : "Article", "author" : { "@type" : "Person", "name" : [ "Nathan Ament" ] }, "datePublished" : "2024-12-19T03:16:15+0000", "description" : "Navigating California’s Clean Truck Check: A guide for out-of-state truckers to understand regulations and ensure compliance.", "headline" : "California Clean Truck Check: A Guide for Out-of-State Truckers", "image" : "https://46144935.fs1.hubspotusercontent-na1.net/hubfs/46144935/Screenshot%202024-12-18%20at%207.12.19%20PM.png", "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://46144935.fs1.hubspotusercontent-na1.net/hubfs/46144935/Screenshot%202024-09-02%20at%209.04.58%20AM-1.png" }, "name" : "Sac Valley Mobile Diesel Testing" }, "url" : "https://sacvalleydieseltesting.com/blog/california-clean-truck-check-a-guide-for-out-of-state-truckers" } ```