Heavy Duty Diesel Smog Checks
Clean Truck Check
CARB Smog Check
Drop IN OK
Gross Vehicle weight above 14,001
Mention Website To Get $20 Off Free Re-Test If You Fail
Prices
Hensley's Auto Does Heavy Duty Diesel Smogs. Mobile service avalible for 3 vehicles or more. Otherwise you will need to come in. Please detatch trailer before comming in.
The California Air Resources Board (CARB) website can be challenging to navigate and understand. To assist our customers, we've compiled key information based on extensive research and customer feedback. We believe the following information is accurate and will update it promptly as new details become available through ongoing research and customer input.
California is banning all heavy-duty diesel engines from model year 2009 and earlier unless they have an approved retrofit installed. There are some specific exemptions, and we've provided relevant links below for further reference.
Personal-use motorhomes are exempt from the retrofit requirement but must still undergo emissions testing. Note that these motorhomes cannot be listed on the Excluded Diesel Database due to their retrofit exemption status.
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Step 1 - Put your vehcile on database and pay fee. Vehicle Inspection System (CTC-VIS) Portal
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Link explaining what needs to be retrofited and what is exempted.
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Information about exempted vehicles
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EDVR(Excluded Diesel Vehicle Reporting System)
EDVR is for model Year 2010 or older vehicles.
You can only travel 1000 miles a year in CA. If you leave CA write down your milage and have a log book. Pictures of odometer is required.
Excluded Diesel Vehicle Reporting System
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Heavy Duty Diesel vehicles older than 2010 need to be retrofited. (2009 and older)
Vehicles with an OBD system are 2013 and above in most cases. OBD vehicles will have a check engine light or some kind of MIL for the emisson system.
There is no visual inspection on heavy duty 14,001 gvwr or over vehicles getting an OBD smog check. Gas vehicles require a visual inspection. There is no guidence on monitor set critera like there is for gas vehicles.
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Vehicles without an OBD system will require an opacity test. An opacity test checks for particulate matter. These vehicles will require a visual inspection. An emission sticker is required otherwise the vehicle will fail the test. If you don't have an emssion sticker you will need to contact the engine manufacturer to get one.
Starting January 1st 2023 Roadside Emissions Monitoring Devices (REMD) will be placed on CA roads in order to flag vehicles who have high emissions.
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If your vehicle is flagged you will get a Notice to Submit to Testing (NST) letter and have 30 days to submit a passing emissions test to CARB.
Starting 7/1/2023
Vehicle owner is required to add there vehicle to the clean truck database and pay a $30 fee.
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Tutorial for clean truck database
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Starting in 2024 14,000 gvwr duty diesel vehicles will need to be smoged 2 times a year that have an OBD system (On Board Diagnostics) Generaly that is 2013 and newer vehicles. Those vehicles will have a check engine light also.
Heavy duty recreational vehicles will be smogged 1 time per year.
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Starting in 2027 the inspection interval will be increased to 4 times per year for obd systems. Recreational vehicles will remain 1 time per year.