PAN (Front) 4S5785 - Caterpillar

Illustration 1 g00680454
System Response:The ECM will log the derate. The ECM derates the engine power by 15 percent. The ECM will restore full power to the engine when the engine oil pressure rises above the trip line for the oil pressure map. Refer to Illustration 1.
Low power
There may be a problem with the engine lubrication system.
There may be a problem with the engine oil pressure sensor.Test Step 1. Check the Engine Oil Level
Check the engine oil level.Expected Result:The engine oil level is OK.Results:
OK - The engine oil level is OK. Proceed to Test Step 3.
Not OK - The engine oil level is low.Repair: Add engine oil to the proper level. Stop.Test Step 2. Verify Proper Sensor Installation
Check the installation of the engine oil pressure sensor.
Check the wiring of the engine oil pressure sensor. Refer to the Electrical Schematic for the proper wiring. Ensure that all of the wires and connectors are properly connected.Expected Result:The sensor is properly installed and the wiring is correct.Results:
OK - The sensor is properly installed. Proceed to Test Step 3.
Not OK - The sensor is not installed properly.Repair: Install the engine oil pressure sensor properly. Repair the wiring and/or the connectors to the sensor.Verify that the repair eliminates the problem. Stop.Test Step 3. Check for Diagnostic Codes
Connect the Caterpillar Electronic technician (Cat ET) to the data link connector.
Turn the keyswitch to the ON position.
Check for any active diagnostic codes or logged diagnostic codes.Expected Result:There should be no diagnostic codes that are present.Results:
OK - Proceed to Test Step 4.
Not OK - Repair: Repair the diagnostic codes that are present. Refer to the appropriate topic in the "Troubleshooting With a Diagnostic Code" section of this manual.Ensure that the repair eliminates the problem. Stop.Test Step 4. Perform a Check of the Engine Lubrication System
Perform a check of the engine lubrication system. Refer to Troubleshooting, "Low Engine Oil Pressure".Expected Result:There are no problems with engine oil pressure.Results:
OK - There may be an intermittent problem.Repair: Monitor the operation of the engine.Repair the problem.Ensure that the repair eliminates the problem. Stop.
Not OK - Repair: Repair the problem.Ensure that the repair eliminates the problem. Stop.