CARB Clean Truck CheckTesting in San Diego
California's CARB Clean Truck Check is now required for registration renewal and port terminal access. LTEK performs on-site testing with CARB-approved equipment at our Otay Mesa shop. If your truck fails, we diagnose the emissions issue, perform the repair, and retest on-site — all in one place.
Don't risk your registration or port access. Get tested and stay compliant.
Most Failures Are Aftertreatment Issues
The Clean Truck Check reads your OBD system for active emissions-related fault codes. The most common reasons trucks fail are DPF-related codes, SCR efficiency faults, NOx sensor failures, DEF system issues, and EGR-related codes. These are all aftertreatment problems — and aftertreatment repair is our #1 specialty.
We don't just clear codes and hope for the best. We diagnose the actual component failure, repair it, verify the fix with a post-repair scan, and then retest with CARB-approved equipment.
If You Drive in California, You Need This
The CARB Clean Truck Check applies to medium- and heavy-duty diesel vehicles operating in California. It's being phased in:
If your truck can't pass, you can't register. And if it can't register, it can't haul. Don't wait until renewal time — get tested now.
Common Questions
How much does a CARB Clean Truck Check cost in San Diego?+
Call us at (619) 848-0459 for current testing pricing. If your truck fails and needs repairs, we provide a separate repair estimate before any work begins.
What happens if my truck fails the Clean Truck Check?+
We diagnose the specific emissions fault causing the failure, perform the repair, and retest — all at our shop. Most failures are aftertreatment-related (DPF, SCR, DEF, NOx sensors) which we specialize in.
Do I need the Clean Truck Check to renew my registration?+
Yes. Starting in 2024, California requires the Clean Truck Check for DMV registration renewal of medium- and heavy-duty diesel vehicles. Without a passing test, you cannot renew your registration.
Can you test and repair on the same visit?+
Yes — that's our advantage. We test with CARB-approved equipment, and if you fail, our technicians diagnose and repair the issue on-site. Once repaired, we retest immediately. One trip, one shop.
Can you handle CARB testing for my entire fleet?+
Yes. We offer fleet CARB testing programs. We schedule, test, track, and document results for your entire fleet. Learn about fleet programs →
