What Is Clean Truck Check?

Clean Truck Check (CTC) is California’s mandatory emissions testing program for heavy-duty diesel vehicles. Administered by the California Air Resources Board (CARB), this program ensures trucks operating in California meet emissions standards to improve air quality.

Who Needs Clean Truck Check Testing?

Your vehicle requires Clean Truck Check testing if it meets ALL of these criteria:

  • Gross Vehicle Weight Rating (GVWR) over 14,000 lbs

  • Diesel-powered engine

  • Operates in California (even if registered out of state)

  • Model year 2013 or newer (OBD test) OR pre-2013 (Opacity/OVI test)

Vehicles That Require Testing:

  • Semi-trucks and tractors

  • Box trucks and straight trucks

  • Dump trucks and concrete mixers

  • Buses (non-transit)

  • RVs and motorhomes over 14,000 lbs GVWR

How Does Clean Truck Check Work?

Step 1: Determine Your Test Type

Engine Year 2013 or newer: OBD Test — On-board computer scanned for emissions codes

Engine Year Pre-2013: OVI Test — Smoke opacity measured using SAE J1667 protocol

Step 2: Schedule Your Test

NorCal CARB Mobile comes to your location. No need to take your truck to a testing station. Call (916) 890-4427 to book same-day or next-day testing.

Step 3: Pass or Repair

Pass: You receive a compliance certificate. Results reported to CARB’s CTC-VIS system.

Fail: We explain what repairs are needed. Retest at discounted rate after repairs.

Step 4: Stay Compliant

Testing is required annually (increasing to twice yearly in 2026). We track your deadlines and send reminders.

What Happens If I Don’t Comply?

Non-compliance triggers serious consequences:

  • DMV Registration Block — Cannot renew registration

  • Roadside Inspection Fines — $1,000+ per violation

  • Out-of-Service Orders — Vehicle cannot operate until compliant

  • CARB Enforcement Actions — Additional penalties and audits

Clean Truck Check Pricing

  • OBD Testing — $75 (2013+ engines, same-day results)

  • Smoke Opacity (OVI) — $250 (Pre-2013 engines, SAE J1667 protocol)

  • RV/Motorhome — $300 (All model years)

  • Fleet Discount — Call for pricing (5+ vehicles, volume pricing)

Why Choose NorCal CARB Mobile?

  • ✅ Mobile Service — We come to you anywhere in California

  • ✅ CARB Certified — Tester ID: IF530523

  • ✅ Same-Day Results — Compliance certificate issued immediately

  • ✅ Fleet Specialists — Volume discounts and centralized billing

Schedule Your Test Today

Call (916) 890-4427 or Book Online