Every Fault Code, Every Time

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.

Diesel Repairs Truck Fault Code database

Instant Repair Information for Everyone

Free users can search and view the entire Diesel Repair database with fault code descriptions and “quick repair” troubleshooting.

Diesel Repair subscribers get detailed step-by-step repair information for every fault code searched.

Developed by subject matter experts at Diesel Laptops, our fault code repair guides are painstakingly accurate and up-to-date. They feature a consistent layout and easy-to-use instructions across all manufacturers. Engines, transmissions, anti-lock brake systems, and more!

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Are you ready to get started with Diesel Repair? Dive into the most robust and accurate repair info in the industry. Getting started is easy. Start with our FREE plan, or go straight into our unlimited plan, Diesel Repair Professional. Sign up today!

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Every Fault Code you Need

Our database contains every fault code and repair information for all engine manufacturers, transmissions, Anti-lock brake systems and more.

Engine Manufacturer Fault Codes

  • Caterpillar
  • Chevrolet Duramax
  • Cummins
  • Detroit Diesel
  • Ford PowerStroke
  • GMC Duramax
  • HINO
  • International Engines
  • Isuzu Engines
  • MBE (Mercedes-Benz Engines)
  • Mack Engines
  • Mitsubishi FUSO
  • PACCAR Engines
  • RAM Cummins
  • Sprinter Engines
  • Volvo Engines

Transmission Fault Codes

  • Allison
  • Chevrolet
  • Eaton
  • HINO
  • Mack mDrive
  • Meritor
  • Mitsubishi FUSO
  • Volvo iShift

Anti-lock Brake System (ABS) Fault Codes

  • Bendix ABS – Hydraulic
  • Bendix ABS – Air
  • Mitsubishi FUSO


Other Modules

  • Bendix VORAD ADAS System
  • Bendix Wingman ADAS System
  • Freightliner Cab & Chassis Controllers
  • Freightliner Custom Chassis Corporation (FCCC) Body Controllers
  • Hino Cab Controllers
  • International Cab & Chassis Controllers
  • Kenworth Cab & Chassis Controllers
  • Mack Cab & Chassis Controllers
  • Mitsubishi FUSO Cab & Chassis Controllers
  • Peterbilt Cab & Chassis Controllers
  • RAM Cab & Chassis Controllers
  • ThermoKing Reefers & APUs
  • Thomas Built Buses
  • Volvo Truck Cab & Chassis Controllers
  • WABCO OnGuard & OnLane ADAS Systems
  • Western Star Cab & Chassis Controllers

One Click from Code to Fix

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. 

Users can enter any search query, partial or full. This ensures they can easily find what they are looking for on Diesel Repair.

Need Help Getting Started?

Getting started with Diesel Repair is a breeze! Whether you want to dip your toes for free or dive right into our unlimited plan, we've got you covered. From symptom-based troubleshooting to equipment fault codes, parts information, and more, our easy-to-use platform is your ultimate resource for all things diesel repair. Join the thousands of satisfied customers who trust Diesel Repair for their heavy-duty repair needs.

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