GAUGE AS-OIL LEVEL (DIPSTICK) 6I1380 - Caterpillar

Table 1
Diagnostic Codes Table    
Code and Descriptions    Conditions which Generate this Code    System Response    
98-18
Engine Oil Level: Low - moderate severity (2)     The engine oil level has dropped below the level of the sensor for the time specified in the ECM.     The code is logged.
The ECM may derate the engine or shutdown the engine.    
98-1
Engine Oil Level: Low - most severe (3)    
E171(2)
Low Engine Oil Level : moderate severity     The engine oil level has dropped below the level of the sensor for the time specified in the ECM.     The code is logged.
The ECM may derate the engine or shutdown the engine.    
E171(3)
Low Engine Oil Level : most severe    System OperationUse this procedure to troubleshoot any suspect problems with the engine oil level sensor circuit.The ECM monitors the engine oil level prior to the engine starting.The most likely cause of a code is a problem with an electrical connector or wiring. The least likely cause of a code is the ECM.
Illustration 1 g03254876
Location of the oil level sensor
Illustration 2 g03254796
(1) Sensor (2) Sensor probe (brass dowel) (3) Plastic coverOil level sensor (1) contains no moving parts. The sensor provides the same function as a switch. The state of the switch is dependent on the capacitance value that is detected at the probe sensor. The sensor contains a probe (2) that is covered with a plastic cover (3) .When the sensor probe is immersed in oil, the sensor senses a particular capacitance. The sensor electronics react by sinking the signal to the return (ground). When the probe is not immersed in oil, the supply voltage is sourced to the signal wire.Probable Causes
Low engine oil level
Problem with an electrical connection or with the wiring
Problem with the oil level sensor
Illustration 3 g03366526
Engine oil level sensor schematic
Illustration 4 g03254376
(P1-4) 8 V supply (P1-18) 8 V return (P1-35) Sensor signal
Illustration 5 g01159881
Table 2
Troubleshooting Test Steps    Values    Results    
1. Low Engine Oil Level
A. Check the engine oil level in the crankcase.
    Oil level    
Result: The engine oil level is low.
Repair: Add engine oil in order to obtain the correct engine oil level. Refer to Operation and Maintenance Manual, "Engine Oil" for the recommendations of engine oil.
Start the engine. Inspect the exterior of the engine for oil leaks. Repair any oil leaks.
Verify that the