50 Caterpillar generator fault/alarm codes with symptom, cause and remedy — compiled from Caterpillar service and controller documentation.
| Code | Meaning / symptom | Cause | Remedy |
|---|---|---|---|
| $0000 | Valid Data | ||
| $0001 | Error | ||
| $83 | Exception Response to Read Registers Query | ||
| $86 | Exception Response to Write Single Register Query | ||
| $90 | Exception Response to Write Multiple Registers Query | ||
| 100-11 | Very Low Oil Pressure | ||
| 1000; 1900; 1901; 1902 | The “DIAGNOSTIC” lamp is used to indicate the existence of an active fault by flashing codes. | ||
| 105-11 | Very High Intake Manifold Air Temperature | ||
| 11 | Fuel Injector Failure | ||
| 110-11 | Very High Coolant Temperature | ||
| 111-11 | Very Low Coolant Level | ||
| 13 | Fuel Pump Failure | ||
| 15 | Ignition Failure | ||
| 17 | ECU Internal Failure | ||
| 18 | Crankshaft Position Sensor Failure | ||
| 19 | ECU Reset | ||
| 190-00 | Engine Overspeed Warning | ||
| 2 | TPS Failure | ||
| 21 | Fault shutdown | ||
| 22 | Engine Overspeed Failure | ||
| 24 | Load Stability Sensor Failure | ||
| 27 | Stepper Motor Stuck | ||
| 28 | Engine Starting Failure | ||
| 3 | Cylinder Temp. Failure | ||
| 3111 | 0 | ||
| 4 | Air Temp. Failure | ||
| 5 | System Voltage Low | ||
| 55 | Diagnostic Code 55 | ||
| 551 | Flash Code 551 indicates that No Detected Faults have occurred since the ignition keyswitch has been turned to the ON position. | ||
| 6 | System Voltage High | ||
| 7 | Cylinder High Temp. | ||
| 8 | Barometric Pressure Sensor Failure | ||
| 84-00 | Vehicle Overspeed Warning | ||
| 84-14 | Quick Stop Occurrence | ||
| 9 | Oil Pressure Anomaly | ||
| Diagnostic Flash Code | The “DIAGNOSTIC” lamp flashes in order to indicate a two-digit code. | ||
| Diagnostic Lamp flashes a fault code | General engine fault | Refer to the Messenger display for any additional information that may be available. | |
| E0190 | An overspeed condition is detected by the Electronic Control Module (ECM). The event code E0190 will be logged if the engine speed exceeds 3300 rpm. | ||
| active fault code | Electronic problem detected | ||
| i01190421 | Low power or poor performance in the winter | Before troubleshooting for low power or for poor performance in the winter, check the type of fuel that is being used. When No. 2 diesel fuel is used the following components provide a means of minimizing problems in cold weather: • Starting aids • Engine oil pan heaters • Engine coolant heaters • Fuel heaters • Fuel line insulation | |
| i01197515 | SMCS Code: 1000 | • Check the crankcase oil level. Maintain the oil level between the “ADD” mark and the “FULL” mark on the oil level gauge. • If necessary, perform minor adjustments. Repair any leaks and tighten any loose bolts. • Note the service hour meter reading. Perform the maintenance that is in the Operation and Maintenance Manual, “Maintenance Interval Schedule”. | |
| i01226491 | Engine overspeed | Stop the engine by shutting off the fuel supply to the engine and/or shutting off the air supply to the engine. | |
| i01324368 | An intermittent failure in the TPS causes the engine speed to vary erratically. | ||
| i01324374 | Engine Operation with Active Diagnostic Codes | If the diagnostic lamp starts to flash codes during normal engine operation, the system has identified a situation that is not within the specification. Use Caterpillar electronic service tools to check the active diagnostic codes. | |
| i01456915 | Engine Operation with Intermittent Diagnostic Codes | If the diagnostic lamp starts to flash codes during normal engine operation and the diagnostic lamp shuts off, an intermittent fault may have occurred. If a fault has occurred, the fault will be logged into the memory of the Electronic Control Module (ECM). | |
| i01462046 | Engine Stopping | Stop the engine according to the procedure in the Operation and Maintenance Manual, “Engine Stopping (Operation Section)” in order to avoid overheating of the engine and accelerated wear of the engine components. Use the Emergency Stop Button (if equipped) ONLY in an emergency situation. Do not use the Emergency Stop Button for normal engine stopping. After an emergency stop, DO NOT start the engine until the problem that caused the emergency stop has been corrected. | |
| i01463504 | Fault Logging | The system provides the capability of Fault Logging. When the Electronic Control Module (ECM) generates an active diagnostic code, the code will be logged in the memory of the ECM. | |
| i02710753 | Engine may not start properly due to severely discharged battery. | After jump starting, the alternator may not be able to fully recharge batteries that are severely discharged. The batteries must be replaced or charged to the proper voltage with a battery charger after the engine is stopped. | |
| logged fault | Problem has occurred, but is not presently active | ||
| null | Increased coolant temperature |
Compiled from Caterpillar service manuals and controller documentation. Cause/remedy shown where extracted; always verify against the manual for your exact model.