Caterpillar 4441-Up (Engine) Engine

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• Wastegate Solenoid Fault — Low Power 177
  Fix: Schedule a Service
• Very Low Oil Pressure Warning — if the DERATE mode of the engine monitoring system is selected, the ECM will derate the engine power; the engine horsepower will be limited
  Cause: Engine oil pressure below the very low oil pressure setpoint, which is dependent upon the engine speed
• Timing Calibration Fault — Low Power; Reduced Engine Speed 143
  Fix: Schedule a Service
• Throttle Position sensor Fault — Low Power; Reduced Engine Speed 154
  Fix: Schedule a Service
• Secondary Throttle Position sensor Fault — Low Power; Reduced Engine Speed 155
  Fix: Schedule a Service
• Secondary Speed/Timing Sensor Fault — Reduced Engine Speed 142
  Fix: Schedule a Service
• SAE J1939 Data Link Fault — Low Power; Reduced Engine Speed 514
  Fix: Schedule a Service
• Primary Speed/Timing Sensor Fault — Engine Misfire; Reduced Engine Speed 141
  Fix: Schedule a Service
• Overspeed — the "DIAGNOSTIC" lamp will indicate a diagnostic fault code; the diagnostic fault code will remain active until the engine speed drops to 2800 rpm E0190
  Cause: Engine speed exceeds 3300 rpm
• Oil Pressure Sensor Fault — Engine Misfire; Low Power; Reduced Engine Speed; Engine Shutdown 157
  Fix: Shut Down the Engine: Operate the engine cautiously. Get immediate service. Severe engine damage may result; Schedule a Service
• No Detected Faults have occurred since the ignition keyswitch has been turned to the ON position 551
  Fix: Troubleshooting is not required for code "551"
• Machine Security System Module Fault — the engine will not start 426
  Fix: Schedule a Service
• Low Oil Pressure Warning — the fault will be active and logged only if the engine has been running for more than 8 seconds
  Cause: Engine oil pressure below the low pressure warning setpoint, which is dependent upon the engine speed
• Low Engine Coolant — Low Power; Reduced Engine Speed 169
  Fix: Schedule a Service
• Keyswitch Fault 429
  Fix: Schedule a Service

Compiled from service & troubleshooting documentation across every generator set that uses the Caterpillar 4441-Up (Engine).

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.