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.

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!


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.

Get 14 days free when you book a Diesel Repair demo today.

Join us for a free tour around the Diesel Repair platform and let us show you how our customers save time, money, and eliminate frustration when they can find repair information fast.

Diesel Laptops is a leading innovator in the diesel diagnostics and repair industry. We provide hardware and software tools empowering users to diagnose and repair their equipment any way they choose.


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