Close the doors and insert the key into the ignition.Follow these steps to clear the Cummins fault codes with a scanner: If that’s the case, then an Onboard Diagnostics scanner (OBD-II) can be used to clear the fault codes.
Press the appropriate button on the diagnostic tool and turn the key back on.ĭepending on the powertrain control module (PCM) software or “flash”, the above procedure might not work. At the end of the procedure, the ignition key should be turned off. Another option is to select “erase all faults” and then follow the onscreen instructions. The displayed codes can generally be clicked on one by one. Using a code reader tool, connect to the ECM and find the “fault codes” tab. Software and a diagnostic tool are generally needed for this.
Once any necessary engine repairs have been made, the next thing to know is how to clear fault codes. The newer the engine, the more detailed the fault codes in most cases. There are many new ones that don’t exist for the previous engine as well. The ISX fault codes for the 2007 – 2010 engine are more detailed than the earlier engine. For the latter, 111 has a more specific error: ECM Critical Internal Failure. For the former, the 111 fault code stands for Electronic Control Module. There are dozens if not hundreds of fault codes and they are different with each engine, so it’s important to search for information about specific engines when looking for fault codes.įor example, the list of ISX fault codes without EGR prior to 2002 is a different list from the 2007 2010 ISX fault codes with DPF. Sometimes several drive cycles are necessary to clear the code out of active status. For example, a code can be active after the problem has been repaired. Pending codes can also be intermittent faults or faults that need to be “seen” in at least two warm-up cycles to set them to active. Pending: A pending code is one that hasn’t been cleared.Active: If the error happens during diagnosis, then it’s an active fault.Inactive: If it happens at a time outside of diagnostics, then it’s inactive.If the values go over or drop under what is expected, then the ECM will log a fault code. The Electronic Control Module (ECM) in the engine monitors all the readings constantly as the engine runs. Every circuit and sensor in a modern diesel engine gives off a certain reading and specific voltage signal. What Are Cummins Fault Codes?įault codes indicate that the engine is experiencing a problem. Once the Cummins fault codes are obtained, the next step is to find out what they mean and also how to clear them. These days it’s nearly impossible to work on or repair a Cummins engine without knowing the fault codes.