Helpful Info

A DTC, short for Diagnostic Trouble Code, is an alphanumeric code used to diagnose malfunctions in a vehicle or heavy equipment reported by the OBD system o...

DTCs are generated by the vehicle’s on-board diagnostics (OBD) system whenever a fault is detected. The OBD both diagnoses the fault and displays the DTC th...

OBD-II compliant:  Cars and light trucks built and sold in the United States after January 1, 1996 were required to be OBD-II equipped. J1939 compliant:...

DTC codes are five characters long. Each character in the DTC provides a different piece of information about the vehicle’s problem.  The first character i...

Each DTC corresponds to a specific vehicle malfunction, such as a misfire in engine one. The following common DTC, P0128, would be read like this:  The fi...

Certain DTCs are more likely to appear than others. Below is a list of common DTCs you may encounter and their corresponding malfunctions. P0442: A small ...

A J1939 DTC contains four fields that relay information about the fault being reported by DTC. These fields are: Suspect Parameter Number (SPN): Represent...

Scanners that read DTC, known as OBD-II scanners, are widely available for purchase. But if you’re a fleet manager responsible for numerous vehicles, having...

Seeing an illuminated check engine light without knowing the reason behind it can be troublesome. That’s why it’s important to find a telematics solution, l...