SENSOR & MTG GP-POSITION 4646205 - Caterpillar

Table 1
Diagnostic Trouble Codes for the Engine Pressure Sensors    
J1939 Code    Description    Notes    
190-15     Engine Speed : High - least severe (1)     The Electronic Control Module (ECM) detects that the engine speed has exceeded 3100 rpm for at least 5 seconds.
If equipped, the warning lamp will flash.    The Electronic Control Module (ECM) limits the flow of fuel in order to prevent the engine speed from exceeding the maximum rpm. When the engine speed has dropped to less than the maximum rpm, the engine overspeed diagnostic code will be reset.The following operating conditions can cause the engine speed to exceed this value:
Use of an incorrect fuel
Combustible gases in the air inlet for the engineIf the engine speed exceeds the maximum rpm, the ECM illuminates the warning lamp and an engine overspeed diagnostic code is logged. No troubleshooting is required.The history of engine overspeeds can be viewed on the electronic service tool.