Automotive diagnostics without the guesswork.
Learn how professionals think through automotive problems — not just how they fix them.
Why Diagnostics with Dean?
With over 25 years of real-world experience as a dealership technician, independent shop owner, car flipper, and university professor, Dean teaches diagnostics the way it actually happens in the bay — not the way it’s simplified online.
This site exists to help you stop guessing, stop swapping parts, and start making confident, informed repair decisions.
What You’ll Learn Here
Diagnostic Strategy
How to approach problems methodically
Engine Performance
Misfires, fuel, air, ignition, and emissions
Electrical Systems
Sensors, data, and modern vehicle complexity
Real-World Lessons
Case studies and professional insight
How my videos have helped others.
With nearly half a million views on YouTube, the results speak for themselves! But don’t just take my word for it—see what fellow car enthusiasts have to say. Their success stories and feedback make all the difference.
Latest Diagnostic Breakdown
A recent real-world example of how professionals approach automotive diagnostics.
Ready to diagnose without guessing?
Learn how professionals think through automotive problems and start making smarter diagnostic decisions.
Recent Blog Posts
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How to Relearn Tire Pressure Sensors: A Professor’s Guide
How to Relearn Tire Pressure Sensors: A Professor’s Guide Are you looking to relearn tire pressure sensors on your GM…
