TUBE AS 3T2280 - Caterpillar

Use this procedure in order to troubleshoot low oil pressure. Use this procedure if one of the following event codes is active. Refer to Troubleshooting, "Event Codes" for information about event codes and the default trip points for these codes. You must access the monitoring system on Caterpillar Electronic Technician (ET) in order to view the current trip points for these codes.
Table 1
Event Code    
Code and Description     Conditions which Activate the Code    System Response    
E043(3) Low Engine Oil Pressure Shutdown     The engine oil pressure is less than the trip point and the delay time has expired.     The code is logged.
The engine is shutdown.    
E100(1) Low Engine Oil Pressure Warning     The engine oil pressure is less than the trip point and the delay time has expired.     The code is logged.    
100-1 Low Oil Pressure (Warning)     The engine oil pressure is less than the trip point and the delay time has expired.     The code is logged.
The diagnostic lamp will flash.
The alarm lamp will illuminate.    
100-11 Very Low Oil Pressure (Derate)     The engine oil pressure is less than the trip point and the delay time has expired.     The engine power is derated.
The code is logged.
The diagnostic lamp will flash.
The alarm lamp will flash.    
100-11 Very Low Oil Pressure (Shutdown)     The engine oil pressure is less than the trip point and the delay time has expired.     The code is logged.
The engine will be shutdown after 30 seconds.    Probable Causes
Low engine oil level
Incorrect viscosity
Contaminated engine oil
Faulty oil pressure sensors
Poor circulation of the engine oil
Worn componentsRecommended Repairs
Low Engine Oil Level
Check the oil level. Add oil, as needed.Incorrect Viscosity
Make sure that the engine is supplied with the correct engine oil. For the correct engine oil to use, refer to the Operation and Maintenance Manual.Contaminated Engine Oil
Engine oil that is contaminated with another liquid will cause low engine oil pressure. High engine oil level can be an indication of contamination. Obtain an analysis of the engine oil. Determine the reason for contamination of the engine oil and make the necessary repairs. Change the engine oil and the engine oil filter. For the correct engine oil to use, refer to the Operation and Maintenance Manual.Faulty Engine Oil Pressure Sensors
Use Cat ET to compare the readings of the filtered engine oil pressure and the unfiltered engine oil pressure while the engine is OFF. Both readings should be close to zero pressure.If a reading is significantly different from zero, refer to Troubleshooting, "Sensor Signal (Analog, Active) - Test".Poor Circulation of the Engine Oil
Several factors could cause poor circulation of the engine oil:
The engine oil filter is clogged. Replace the engine oil filter.
An engine oil line or a passage for engine oil is disconnected or broken.
The engine oil cooler(s) is clogged. Thoroughly clean the engine oil cooler(s).
There is a problem with a piston cooling jet. Breakage, a restriction, or incorrect installation of a piston cooling jet will cause seizure of