Now Mobile CARB Clean Truck Check fromTurlock to Bakersfield (Central Valley)

CARB Mobile Clean Truck Compliance in the Central Valley provides mobile diesel smoke opacity testing for $250, and OBD testing for $75 from Turlock to Fresno.

Serving agricultural operations, fleets, trucking corridors, industrial yards, and rural regions throughout the Central Valley.

Get CARB HD I/M compliant with our mobile Clean Truck Check services in Fresno, California. Affordable pricing, no travel fees, and a $10 Visa gift card per referral—unlimited!

Turlock to Fresno and Beyond Clean Truck Check Pricing Comparison

Service | Our Price | With Referral* | Competitors’ Avg.**

One-Time Diesel Test (CARB HD I/M) | $75.00

Motorhomes etc. CARB HD I/M (1 per year) | $300

Small Fleet (3–10 trucks, same appointment) | CALL

Large Fleet (11+ trucks, same appointment) CALL

Emergency / Sunday Appointment | Call for Quote | Call for Quote | $120–$150

*Referral Program: Earn a $10 digital Visa gift card for each referred customer who completes a test. Referrals are unlimited—refer 20 customers, earn $200!

**Competitors’ Avg. Higher Price: Based on market research for mobile CARB HD I/M testing in California. Competitors often charge

extra for travel; we offer consistent pricing in Fresno.

Member Discount: Ask about exclusive savings for members!

See all our rates for Sacramento, San Bernardino, and more!

Industries We Serve: CARB HD I/M Compliance for Central Valley Diesel Fleets

California’s Heavy-Duty Inspection and Maintenance (HD I/M) program requires diesel trucks and buses over 14,000 lbs GVWR to pass periodic emissions testing. Our mobile Clean Truck Check service travels throughout the Bakersfield to Turlock corridor, bringing CARB compliance testing directly to your operation. Check your VIN compliance status at cleantruckcheckvin.app before scheduling.

Agriculture & Farming - Fresno, Madera, Tulare, and Kern County agricultural operations rely on diesel trucks for crop transport, refrigerated hauling, and farm equipment mobility. We test at your farm, dairy, or vineyard. Learn more about CARB agricultural equipment exemptions.

Food Processing & Cold Storage - Distribution centers and food processors along Highway 99 need compliant refrigerated fleets. We test at your loading dock in Fresno, Visalia, and Bakersfield.

Construction & Heavy Equipment - Contractors and excavation companies in Modesto, Stockton, Merced, and throughout the Central Valley depend on diesel power. Get tested on-site at your job location.

Freight & Logistics - Warehouses and trucking companies along I-5 and Highway 99 corridors. Schedule fleet-wide testing at distribution hubs in Turlock, Merced, Madera, and Fresno.

Oil & Gas Services - Kern County oilfield operations near Bakersfield need reliable compliance testing for service trucks and transport vehicles.

Dairy & Livestock - San Joaquin Valley dairies need compliant trucks for feed delivery and milk transport. We service operations in Tulare, Kings, and Fresno counties.

Mobile OVI Testing for Pre-2013 Farm Equipment & Rural Fleets

The Central Valley is home to California's largest concentration of agricultural diesel equipment—tractors, harvesters, irrigation pumps, and heavy haulers—many equipped with pre-2013 engine model year diesels. These older engines are not compatible with standard OBD electronic testing and instead require OVI (Opacity/Visual Inspection) smoke opacity testing using the SAE J1667 snap-acceleration protocol. NorCal CARB Mobile provides on-site J1667 testing at farms, dairies, vineyards, and equipment yards throughout the Central Valley, from Turlock to Bakersfield.

Our mobile service eliminates the need to transport oversized farm equipment to distant testing facilities—a significant advantage in rural communities like Los Banos, Dos Palos, Firebaugh, Coalinga, and Avenal where testing stations are scarce. We bring the equipment, expertise, and CARB certification directly to your operation, ensuring compliance without disrupting harvest schedules or daily operations.

Read more: Do California Agricultural Vehicles Need Clean Truck Check Testing? | CARB J1667 Smoke Testing Explained | Is Your Truck an Agricultural Vehicle?

Check your vehicle's CARB compliance status instantly at carbcleantruckcheck.app or schedule your mobile test at norcalcarbmobile.com.

Truck Stop Testing: CARB Compliance While You Fuel

We bring CARB HD I/M testing to major truck stops throughout the Central Valley. Independent owner-operators and small fleets can get tested while fueling up - no appointment needed for walk-ups during our scheduled truck stop testing days.

Central Valley Truck Stop Testing Locations:

Pilot Flying J - Turlock, Merced, Madera, Fresno, Visalia, Bakersfield

Love’s Travel Stop - Ripon, Los Banos, Coalinga, Delano

TA Travel Center - Lodi, Kettleman City

Petro Stopping Center - Wheeler Ridge

How Truck Stop Testing Works: We set up our mobile testing unit at participating truck stops during peak hours. While your truck is being fueled or during your rest break, our certified technicians can perform the OBD or opacity test. Results are uploaded directly to CARB’s system.

For fleet managers: Partner with us to offer testing at your private fuel island or yard. Contact us about scheduled testing days for your drivers.