PUMP 0021672 - Caterpillar

Which Generate This Code:This diagnostic code is displayed when the display is unable to read the serial number of the Display.Test Step 1. CHECK IF THE DIAGNOSTIC CODE REMAINS
Turn the key start switch and the disconnect switch to the "OFF" position.
Turn the key start switch and the disconnect switch to the "ON" position. Expected Result:The diagnostic code is no longer active.Results:
Ok - The diagnostic code is no longer active. The diagnostic code was probably caused by an issue with the internal software. The display was reset when the power was cycled. Resume normal machine operation.STOP
NOT OK - The diagnostic code is still active.Repair: Contact your Technical communicator for a possible consultation with Caterpillar.STOP