Codes are becoming more "industry standard" in the numbering method, resulting in the original 3-4 digit Cummins codes having new SPN and FMI numbers attached. This has also resulted in a major increase in the number of fault codes present in the Cummins ECM.
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A certain amount of "drive cycles" may be needed to clear a code from the active status. Codes also can be "pending" and also show active even after the problem is repaired. If the error is happening while you diagnose, it is known as an Active Fault.Īll codes can be classified as either Active or Inactive, and their status can be determined by flash codes or through the Insite Electronic Service Tool.ĭue to new OBD2 compliance, codes no longer have to be active or inactive. If the error has occurred but is not happening at the time of diagnostics, it is known as an Inactive Fault. If values rise above or below expected, the ECM will log a code. These signals are monitored constantly by the Cummins ECM. Every sensor and circuit on your engine has a certain expected reading and voltage signal. The problem is, after you get your code numbers, how can you find out what they mean?įault codes are Cummins way of letting you know that your engine has a problem. Today, it is almost impossible to repair your engine without knowing the Cummins codes. Looking for what your Cummins codes mean? Fault codes and descriptions for every Cummins ECM.
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