Mobile diagnostics done at your location — clear results, fast reports, and garage‑grade accuracy at a lower cost. 

Why Choose Us?

• Mobile service — we come to you

• Professional diagnostic equipment

• Clear pricing with no hidden fees

• Fast, accurate fault finding

• Friendly, reliable service

About CDB

CDB Mobile Diagnostics is a mobile vehicle diagnostic service covering Portsmouth and the surrounding areas. Run by technicians/brothers Cyrus Bull & Diesel Bull, we focus on giving drivers clear answers, honest reports, and convenient diagnostics without the hassle of a garage visit.

We handle full system scans, fault‑finding, warning lights, resets, calibrations, and pre‑purchase checks — all done at your home or workplace with professional equipment.

We’re committed to growing, improving, and expanding our services so we can continue to be the best and most reliable option for our customers. Whether it’s a warning light, a fault that needs investigating, or a quick check before buying a car, we’re here to help.