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Mr Diagnostic

The leader in mobile Automotive Diagnostics in New England

About Us

We are a mobile service company that comes to you to evaluate you Automobile's problem. Our company is based on the belief that our customers' needs are of the utmost importance. Our entire team is committed to meeting those needs. As a result, a high percentage of our business is from repeat customers and referrals. 

We would welcome the opportunity to earn your trust and deliver you the BEST service in the industry.

     Our lead technician Craig St. John has over 30 years in the automotive repair field. He is an ASE Master Certified L1 Diagnostic Technician, RI emissions and safety inspector, Emissions certified repair technician for the state of RI and Maryland, AC Delco certified electrical professional, AC Delco Hybrid specialist, IMAC air conditioning certified, An Automotive night class Instructor at MTTI in Seekonk MÁ, a graduate of New England Tech with an associates degree in Automotive Science, and furthers his education every year with different seminars and schooling. He is able to diagnose electrical and electronic problems a lot quicker than others by having dealer level diagnostic equipment and years of experience specializing in this area.

     We have the ability of diagnosing, flashing or reprogramming your vehicles control modules just like the dealer does for the following makes:

  1. Ford, Lincoln, Mercury, Mazda
  2. Chevrolet, GMC, Cadillac, Hummer, Saturn, Buick, Pontiac, Oldsmobile
  3. Honda, Acura
  4. Toyota, Lexus
  5. Chrysler, Jeep, Dodge, Plymouth
  6. Jaguar, Land Rover

  We also offer diagnostics and relearn procedures for NISSAN, HYUNDAI, and KIA.

   We have the ability to diagnose electrical and electronic problems with just about any vehicle made but are limited on some European applications.


West Greenwich, RI 02893


Mon - Fri: 8AM - 5PM

Sat: By appointment only

Sun: Closed