Clean Truck Check OBD & NON OBD Testing

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MJ’s Mobile Fleet is now certified to perform Clean Truck Check (CTC) testing for diesel trucks and fleets operating in California.

We help owner-operators, fleet managers, and fuel haulers stay CARB-compliant, avoid penalties, and keep trucks working instead of sitting.

Clean Truck Check (CTC) is California’s heavy-duty vehicle emissions testing program for most diesel trucks and buses.

Our team can perform both:

• OBD CTC Tests – For newer trucks with onboard diagnostics
   
• Non-OBD / Opacity CTC Tests – For older trucks that require a smoke opacity and visual inspection
   

We can handle:

• Single units
   
• Small fleets
   
• Large fleet testing days scheduled at your yard
   

• Plug-in OBD emissions test
   
• Review results and explain any issues
   
• Upload results to the CARB CTC portal
   
• Provide a copy of the report for your records
   

• Smoke opacity test for older vehicles
   
• Visual inspection of emissions-related components
   
• Documentation and CARB portal upload
   
• Guidance on any needed repairs
   

Mobile Fleet CTC Testing

For fleets, we can come to your yard (where permitted) to test multiple units in one visit, reducing downtime and driver travel.

• Mobile OBD and non-OBD CTC testing
   
• Flexible scheduling (early morning, evenings, some weekends)
   
• Option to combine CTC testing with PM, DOT/BIT, and VK inspections