Intermittent J1939 Faults: Why They are Bleeding Your Fleet Eighteen Thousand Dollars Annually (And How a 30-Minute Wiggle Test Stops It)
The truck rolls into the bay at quarter past six on a Thursday evening. The driver says the check engine light came on somewhere around mile marker 247 on I-80, stayed on for about forty-five seconds, then went out. The gauges flickered once. The transmission shifted hard for maybe three seconds. Then everything went back […]