What are the most common diagnostic trouble codes (DTCs) technicians encounter?

Some of the most common DTCs include P0171 (system too lean), P0420 (catalyst efficiency below threshold), and U0100 (lost communication with ECM). TEXA tools help identify, interpret, and resolve these quickly.

How can I speed up my diagnostic process in the shop?

Use pre-configured diagnostic profiles in IDC6, run guided tests, and leverage service reset shortcuts. TEXA tablets like Axone Voice streamline workflows for faster troubleshooting.

Can diagnostic tools help with intermittent issues?

Yes — IDC6 offers freeze frame data, historical fault tracking, and live sensor monitoring, making it easier to identify and diagnose intermittent electrical or performance issues.

Tech Tips & Troubleshooting | Defy Diagnostics

Free Diesel Truck Wiring Diagrams | Cummins, Detroit, CAT & More

by David | October 27, 2025 | Fleet Maintenance & Management, Heavy Duty Diagnostics, Product Guides & Reviews, Tech Tips & Troubleshooting | 0 Comments

New Free Resource: Downloadable Wiring Diagrams Now Available on DefyDiagnostics.com At Defy Diagnostics, we know how frustrating it can be when you’re chasing down an electrical fault, and you don’t have the right diagram in front of you. Whether you’re...

PFA: A Class Every Fleet Manager Should Experience

by David | October 20, 2025 | Industry News & Updates, Tech Tips & Troubleshooting | 0 Comments

Last week, I attended the Public Fleet Advisors Fleet Management Training Seminar at the Greenville Public Works Facility in Greenville, South Carolina. It was a full day of education, discussion, and perspective, and I left with a deeper respect for the fleet...

DTC Codes, Decoded: Pro Guide & Our New Library

by David | October 7, 2025 | Automotive Diagnostics, Heavy Duty Diagnostics, Off Highway Diagnostics, Tech Tips & Troubleshooting | 0 Comments

Ever cleared a code, took a test drive, and watched that light pop right back on? You’re not alone. Most code lists explain what a DTC means, but not how to use it to make faster, cleaner, safer decisions. Techs and fleet managers need context: severity, first steps,...

Windows 10 Support Ends Oct 14, 2025: What TEXA Users Must Do

by David | September 5, 2025 | Automotive Diagnostics, Industry News & Updates, Software & IDC6 Updates, Tech Tips & Troubleshooting | 0 Comments

Microsoft will officially end support for Windows 10 on October 14, 2025. After that date, Windows 10 machines will continue to run, but they’ll no longer receive security patches, feature updates, or official technical support. For most shops, that’s an IT concern....

Stop Guessing. Start Tracking. Get Our Fleet Maintenance App 100% Free

by David | August 15, 2025 | Fleet Maintenance & Management, Tech Tips & Troubleshooting | 0 Comments

Tired of missing oil changes, DOT inspections, or service intervals? Fleet Tracker Pro is the solution, and we’re giving it away for FREE. Finally: A Simple Way to Track Vehicle Maintenance, Without Paying a Dime Let’s be honest: tracking maintenance is a nightmare....

Top 10 Mistakes to Avoid When Investing in a Diagnostic Tool

by David | August 6, 2025 | Tech Tips & Troubleshooting, Product Guides & Reviews | 0 Comments

(And How to Choose the Right Scanner for Your Shop, Fleet, or Facility) Imagine, your the owner of a busy diesel repair shop and you dropped nearly $8,000 on a scanner that you thought would “do it all.” Two months in, it couldn’t connect to half the fleet. No...

Why Renewing Your TEXA Subscription Matters More Than You Think

by David | July 22, 2025 | Industry News & Updates, Software & IDC6 Updates, Tech Tips & Troubleshooting | 0 Comments

If you're running Texa diagnostic tools, you're already a step ahead of the curve. Whether you're servicing heavy-duty trucks, marine engines, agriculture equipment, or powersports vehicles — Texa gives you powerful insight and control over complex systems. But here's...

5 MPH Derate?

by David | July 10, 2025 | Heavy Duty Diagnostics, Fleet Maintenance & Management, Off Highway Diagnostics, Tech Tips & Troubleshooting | 0 Comments

Here’s What Code 3712 Means — and How to Fix It Fast If you’ve ever had a Freightliner Cascadia, Kenworth T680, or Peterbilt 579 crawl into the shop stuck at 5 mph, chances are you’ve seen Cummins Fault Code 3712 staring you in the face. This one isn’t just a random...

Detect AC Leaks with Confidence: Why the TEXA Forming Gas Kit Belongs in Your Shop

by David | July 9, 2025 | Automotive Diagnostics, Fleet Maintenance & Management, Industry News & Updates, Product Guides & Reviews, Tech Tips & Troubleshooting | 0 Comments

Detect AC Leaks with Confidence: Why the TEXA Forming Gas Kit Belongs in Your Shop When it comes to A/C system diagnostics, guesswork is not an option. Whether you’re servicing a vehicle after a collision repair or troubleshooting a drop in cooling performance,...