Greg, Using diagnostic equipment ( Cat ET and Cummins Insite ) first thing that pops up
on diagnostic troubleshooting is what called an event code. Than I go over to see how many
occurance or count that has happen starting at the first and last occurrence. When there is
high count in short time frame and sometimes timer maxes out on sensor or other electronic
equipment. In most cases dirty or loose connection to sensor there is nothing wrong with the
part in question. Today many many failure are blamed to the electrical component and part
is changed out where in fact there nothing wrong with the part, and again frayed wire, loose
and or dirty connection. Dave atherton Retired Cat Mechanic