CARB Clean Truck Check Testing for Commercial Diesel Fleets

CARB Clean Truck Check compliance testing for Class 6, 7, and 8 diesel trucks. Conveniently located in Phoenix and Chandler for Arizona fleets and California-based carriers.

Testing appointments are for compliant, test-ready vehicles only. This is a compliance testing service only, not a diagnostic or repair appointment.

Call now (602) 878-6088
Schedule your carb testing

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Built for Fleets That Arrive Prepared

Do Not Schedule Testing for Trucks With Active Issues

Active check engine lights

Active emissions faults

DEF or DPF warnings

Derate conditions

Active fault codes

Known emissions-related problems

Incomplete repairs

Repairs must be completed before scheduling a testing appointment.

What “Test-Ready” Means

Before scheduling, vehicles should meet the following conditions:

  • No active check engine light

  • No active emissions codes

  • No derates

  • Running properly

  • Repairs already completed

  • Vehicle driven after repairs

  • Ready for compliance testing

    Testing appointments are for compliant, test-ready vehicles only.

call now (602) 878-6088

Credentialed Clean Truck Check Testing Provider

call now (602) 878-6088

We provide official Clean Truck Check testing for commercial diesel vehicles operating out of Phoenix and Chandler.

Our role is straightforward:

  • Perform compliance testing

  • Submit testing results properly

  • Provide efficient fleet testing support

We are not performing diagnostics or repairs during testing appointments.

Schedule your Carb Testing

Compliance Testing Only

Testing appointments include:

Clean Truck Check testing

Commercial diesel emissions compliance testing

Fleet testing support

Compliance result submission

Schedule your carb testing
Call now (602) 878-6088

What This Service Does NOT Include

Diagnostics

Troubleshooting

Repairs during testing

Fault code analysis

Emissions system repairs

Attempting to “help pass” failing trucks

We do not guarantee passing results.

What This service includes

Clean Truck Check testing

Commercial diesel emissions compliance testing

Fleet compliance support

Official compliance result submission

Scheduled fleet testing coordination

Our focus is strictly compliance testing and reporting.

Call now (602) 878-6088

Carb Testing Service: What You Need to Know

Carb Testing Service: What You Need to Know

  • CARB testing helps verify that diesel trucks and emissions systems are operating within required emissions standards. It focuses on components such as the DPF, DEF, SCR, sensors, and aftertreatment systems that affect emissions performance and road readiness.

  • Emissions-related issues can quickly lead to downtime, failed inspections, warning lights, derates, and expensive repairs. Regular testing helps fleets identify problems early before they impact operations.

  • KTS Diesel works on commercial diesel fleets including:

    • Class 6 trucks

    • Class 7 trucks

    • Class 8 semi trucks

    • Box trucks

    • Day cabs

    • Sleeper trucks

    • Fleet service vehicles

    We support fleets operating throughout Phoenix, Chandler, and surrounding areas.

  • If your truck is showing any of the following symptoms, emissions diagnostics may be needed:

    • Check engine light

    • DPF warning light

    • Frequent regens

    • Loss of power

    • DEF system faults

    • Derate conditions

    • Poor fuel efficiency

    • Excessive smoke or emissions-related fault codes

  • KTS Diesel provides:

    • Diesel emissions diagnostics

    • DPF diagnostics and repair

    • Forced regens

    • DEF system diagnostics

    • SCR system troubleshooting

    • Fault code diagnostics

    • Sensor testing

    • Aftertreatment repairs

    • Preventive fleet inspections

    • Mobile and in-shop service

  • Fleet managers choose KTS because we understand that downtime affects scheduling, deliveries, drivers, and revenue.

    Our team focuses on:

    • Fast turnaround

    • Accurate diagnostics

    • Clear communication

    • Fleet-focused service

    • Mobile support available

    • Preventive maintenance mindset

    • Keeping trucks on the road

  • Whether you manage a small fleet or multiple commercial trucks, KTS Diesel helps keep your vehicles compliant, operational, and ready for the road.