Trouble codes are populated following a protocol, which is just a form of communication for computer networks. One of the most common protocols used in trucking is J1939.

OTR Diagnostics is your new go-to diagnostic tool for repairs. You can use OTR diagnostics to connect, read fault codes, generate a report, and perform advanced commands such as resetting fault codes, resetting aftertreatment systems, and performing forced DPF regens on most engine makes and models.