Cummins ISX15 Symptoms

Common Cummins ISX15 symptoms, what usually causes them, and how to narrow them down.

• DEF Derate or 5 MPH Speed Limit — Cummins ISX15 A Cummins ISX15 (2010–2017) that enters SCR operator inducement and limits speed to 5 mph, often with FC 3712 and FC 3714 present. The symptom is an effect of…
• Frequent Regens or High DPF Soot Load — Cummins ISX15 A diagnostic reference for Cummins ISX15 (2010–2017) engines showing frequent regenerations or a high DPF soot load.
• Hard Start or No Start — Cummins ISX15 A concise diagnostic reference for hard start or no start on the Cummins ISX15 (2010–2017) with CM2250/CM2350 ECM and XPI high-pressure common rail.
• Loss of Power — Cummins ISX15 Diagnostic reference for loss of power on Cummins ISX15 (2010–2017) with CM2250/CM2350 ECM. Covers derate, fuel rail pressure, VGT turbo and EGR-related power…
• Overheating or EGR Cooler Problems — Cummins ISX15 Diagnostic reference for Cummins ISX15 (2010–2017) when the engine runs hot or EGR cooler issues are suspected.