PIN 5558438 - Caterpillar

Table 1
Diagnostic Code    
Description    Flash Code    Default Conditions which Generate this Code    System Response    
190-00 Engine Speed Sensor : High     35     The engine has exceeded the trip point for engine overspeed for the delay time.
    The code is logged. Also, the shutdown solenoid will de-energize until the engine speed is below 2420 rpm.    Probable Causes
Intake air is combustible.
Sudden drop of loadRecommended Actions
Intake Air is Combustible
Check for hydrocarbons in the surrounding atmosphere. Do not operate the engine in an environment with hydrocarbons in the surrounding atmosphere.Sudden Drop of Load
Decrease the load on the engine gradually.