SHAFT AS 3324797 - Caterpillar

Table 1
Event Code    
Description    Conditions which Activate the Code    System Response    
E127(1) Engine Oil Filter Diff Pressure Low Warning     The crank terminate relay is set and the engine has been running for at least 30 seconds. The engine oil filter differential pressure is less than the trip point and the delay time has expired. There are no active codes for the oil pressure sensors.     The alarm output is activated. The code is logged.    
E128(3) Engine Oil Filter Diff Pressure Low Shutdown     The shutdown output is activated. The code is logged.
E129(1) Engine Oil Filter Diff Pressure High Warning     The crank terminate relay is set and the engine has been running for at least 30 seconds. The engine oil filter differential pressure is greater than the trip point and the delay time has expired. There are no active codes for the oil pressure sensors.     The alarm output is activated. The code is logged.    
E130(3) Engine Oil Filter Diff Pressure High Shutdown     The shutdown output is activated. The code is logged. Probable Causes
An indication of high engine oil filter differential pressure will be caused by either of the following conditions:
Plugged engine oil filter element
Faulty engine oil pressure sensor
Cold engine oilAn indication of low engine oil filter differential pressure will be caused by either of the following conditions:
An engine oil filter element is missing or an element is damaged.
Faulty engine oil pressure sensorRecommended Actions
Engine Oil Filter Element
As the engine oil filter elements become plugged, the engine oil filter differential pressure rises. Replace the engine oil filters when the engine oil filter differential pressure reaches 100 kPa (15 psi).If an engine oil filter element is missing or the element is damaged, the unfiltered engine oil will cause low engine oil filter differential pressure. Make sure that elements are installed in the engine oil filter housings. Inspect the engine oil filter elements for good condition. Replace any suspect filter element.Engine Oil Pressure Sensors
Use Cat ET to compare the readings for the filtered engine oil pressure and the unfiltered engine oil pressure while the engine is OFF.If the readings are not approximately zero for both of the sensors, there is a problem with a sensor. Replace the sensor.