Legal•About
About BigRigFaults
BigRigFaults.com is a reference site for heavy-duty truck fault codes and diagnostics concepts, written in plain language so drivers, fleet owners, and technicians can find answers faster.
What this site provides
- General educational explanations of fault codes and related terms.
- Typical causes and common checks people do first.
- Structured pages to help you search by code format (SPN/FMI, OBD, OEM).
What this site does not provide
- OEM service manuals or official manufacturer instructions.
- Guaranteed fixes or professional mechanical advice.
- Real-time diagnostics for your specific vehicle.
Important note
Always verify details using official manufacturer documentation, authorized dealers, and/or qualified technicians. If a fault code indicates a safety risk, follow the manufacturer’s guidance and stop operating the vehicle when required.