Question 1

Questions about CARB Clean Truck Check (HD I/M)?

Accepted Answer

For official program details, see CARB's Clean Truck Check program page at https://ww2.arb.ca.gov/our-work/programs/CTC/about and the official FAQ fact sheet at https://ww2.arb.ca.gov/resources/fact-sheets/clean-truck-check-faq-0.

Question 2

Which vehicles does Holistic Diesel test?

Accepted Answer

We perform OBD testing for heavy-duty (Gross Vehicle Weight Rating ≥ 14,000 lbs.) diesel vehicles and diesel hybrids with 2013 and newer model year engines, as well as alternative fuel (e.g., natural gas) and alternative fuel hybrid heavy-duty vehicles with 2018 and newer model year engines.

Question 3

Do you really come to us?

Accepted Answer

Yes — we are fully mobile. Our CARB-certified technicians bring the testing equipment to your fleet yard, warehouse, truck stop, or wherever your vehicles sit, anywhere in Southern California.

Question 4

How much does testing cost?

Accepted Answer

A single test is $150 per truck. Our most popular option is the 6-Month Test Bundle for $200: it covers one truck's initial test today plus the next required test in 6 months, tracked and reminded by Holistic Diesel. Contact us for fleet pricing on 2+ trucks.

Question 5

How do I get my results?

Accepted Answer

Results are documented digitally and submitted for you. You receive your compliance documentation the same day, ready to share with auditors or brokers.

Question 6

What if my truck fails?

Accepted Answer

We'll advise you on next steps and can return for a retest after repairs, so you're back in compliance as quickly as possible.

Question 7

Do you offer service in Spanish?

Accepted Answer

Yes — we are fully bilingual in English and Spanish, from scheduling through results.

Frequently Asked Questions