Mobile CARB Opacity Testing for Diesel Trucks & RVs (Pre‑2013 Engines)

Serving Chico → Sacramento → Modesto → Merced → Fresno and now San Diego County with CARB‑approved OVI smoke opacity testing using Wager 6500 (SAE J1667). We come to you and submit results directly to CARB

Book Mobile TestingCheck CARB Compliance

Email us: support@norcalcarbmobile.com

Why choose AMB Group

Veteran‑owner, service‑focused, and reliability‑drivenWe submit test results directly to CARB.
Mobile service at your yard, shop, home, field, or jobsiteSpecialized in pre‑2013 diesel engines for trucks and motorhomes.
Serving Chico to Fresno, plus San Diego County on Fridays & Sundays
Free retest within 30 days after repairs if your vehicle fails.
CARB‑approved Wager 6500 equipment and SAE J1667 procedures.

Simple, Transparent Pricing

Diesel Truck (pre‑2013 engine): $250 per vehicle
Motorhome / RV: $299 per vehicle
San Diego County (Fridays & Sundays): $229 per vehicle (end‑of‑year push)
Fleet and multi‑vehicle discounts are available. Contact us for a custom quote and scheduling
Frequently Asked Questions

Who needs the smoke opacity test?

Any diesel truck, bus, or motorhome with an engine manufactured before 2013 operating in California may be required to complete smoke opacity testing under CARB’s HD I/M program

How often is testing required?

Testing frequency depends on CARB requirements for your specific vehicle and compliance history. Many vehicles are required to complete opacity testing annually or within specific windows when notified by CARB

Is mobile testing allowed by CARB?

Yes. CARB allows mobile testing when approved equipment, such as the Wager 6500 meeting SAE J1667, is used and proper test procedures are followedDo you report results to CARB?

Yes. AMB Veteran Group – NorcalCARBmobile.com Opacity Division submits your test results directly to CARB so your compliance is recorded promptly

What if my truck or motorhome fails?

If your vehicle fails the opacity test, we provide your recorded smoke opacity readings and explain what they mean. Once repairs or adjustments are completed, we return within 30 days for a free retest to help you meet CARB compliance requirements

Is San Diego County included in your service area?

Yes. We serve San Diego County on Fridays and Sundays only for $229 per vehicle, ideal for end‑of‑year compliance and HD I/M testing needs

CALL 916-890-4427