When a truck throws a fault code, the clock starts ticking. You need to know what it means, what caused it, and how to fix it—fast.
That’s exactly why Diesel Repair’s Fault Code Database exists. Built for heavy-duty technicians and shop owners, this tool helps you move from code to action in seconds—not hours.
How to use the Truck Fault Codes
- Log into Diesel Repair: https://app-repair.diesellaptops.com/#/login
- Find the section on the left side menu “Truck Fault Codes”
- Select Make, Model, Year, and type in your fault code OR leave blank to display all
- That’s it. Now you have your fault codes displayed, trouble shooting tips, and step by step
what to know about the Truck Fault Code database
- Diesel Repair has the BIGGEST fault code database in the diesel industry: every commercial truck DTC from the introduction of Electronic Control Modules (ECMs) to the current year and models.
- OEM and generic are all accounted for, so no matter how you retrieve the codes, you’re able to find the repair information– faster and easier than ever before.
- Search by fault code, year, make, or model, and get a complete list of DTCs with detailed descriptions, a list of potential causes, and repair guides. Save or print any document you need.
- Fault code lookups is the #1 most use feature of Diesel Repair
Why the Truck Fault Code Database Matters
📍 Coverage
- The Truck Fault Code Database inside Diesel Repair supports a wide range of heavy-duty vehicles, with deep coverage across manufacturers and systems
- Covers top OEMs like Freightliner, Peterbilt, Kenworth, Volvo, Mack, International, and more
- Supports fault codes across major engine platforms including Cummins, Detroit Diesel, PACCAR, Navistar, and others
💡 What Makes It Different
- This isn’t just a fault code reader. It’s a diagnostic starting point built for techs.
- Translates fault codes into plain-English explanations
- Provides likely causes, repair procedures, and wiring diagrams
- Integrates directly with Diesel Repair’s ecosystem: repair documents, part lookup, and more
- Updated regularly with new codes, OEM data, and real-world insights from working techs
📈 Real Value for Techs and Shops
- The Truck Fault Code Database delivers time-saving impact where it counts:
- Speeds up the path from fault code to diagnosis
- Reduces guesswork by showing verified repair info
- Helps techs avoid pulling the wrong documents or wasting time on unrelated codes
- Builds trust in the bay—techs know exactly where to start
Want to see how it works? Watch as Kyle walks through how to use Diesel Repair’s Truck Fault Codes and where it fits in your Diesel Repair workflow. Want to book a personalized Demo? Submit your information on our contact form and we’ll reach out to schedule a demo so we can show you Diesel Repair and answer any questions you have!
Get Started for Free
You don’t need a subscription to use the Truck Fault Code Database. Just create a free Diesel Repair account and give it a try on your next job.
Want to dive deeper into fault codes and how Diesel Repair can help? Check out these related blog posts:
🔧 Your Guide to the Truck Fault Code Database
An overview of how the database works, what it covers, and why it matters.
🚛 Volvo Truck Fault Codes: What You Need to Know
Working on a Volvo? Here’s how to quickly decode fault codes and get the right repair info.
🆕 Truck Fault Code Database: What’s New
See what’s been updated recently, including new code coverage, layout changes, and added repair steps.