Heavy Equipment Fault Codes

1,480 codes
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All Caterpillar (1,290) Komatsu (57) John Deere (52) Volvo (43) Doosan (21) JCB (9) Case (8)
Code Brand Model Error / Alarm Type Severity Action
421-6 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 421 FMI 6 - Transmission Oil Level (Low) Current Above Normal/Grounded Circuit heavy-equipment Major View →
CID-117-FMI-6 Caterpillar CAT Electronic Control Module Caterpillar CID 117 FMI 6 - Swing Brake Oil Pressure: Current Above Normal, or Grounded Circuit heavy-equipment Major View →
61-6 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 61 FMI 6 - Alternator (Field Current) Current Above Normal/Grounded Circuit heavy-equipment Major View →
381-2 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 381 FMI 2 - Engine Air Filter Restriction Switch Data Erratic/Intermittent heavy-equipment Minor View →
CID-76-FMI-3 Caterpillar CAT Electronic Control Module Caterpillar CID 76 FMI 3 - Fuel Injection Timing: Voltage Above Normal, or Shorted to High Source heavy-equipment Major View →
252-6 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 252 FMI 6 - Fuel Injector (Cylinder 2) Current Above Normal/Grounded Circuit heavy-equipment Major View →
CID-156-FMI-2 Caterpillar CAT Electronic Control Module Caterpillar CID 156 FMI 2 - Operator Presence: Data Erratic, Intermittent, or Incorrect heavy-equipment Major View →
CID-128-FMI-4 Caterpillar CAT Electronic Control Module Caterpillar CID 128 FMI 4 - Stick Cylinder Head Pressure: Voltage Below Normal, or Shorted to Low Source heavy-equipment Minor View →
CID-79-FMI-4 Caterpillar CAT Electronic Control Module Caterpillar CID 79 FMI 4 - Engine Speed Sensor: Voltage Below Normal, or Shorted to Low Source heavy-equipment Critical View →
58-18 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 58 FMI 18 - Analog Temperature Sensor Data Valid But Below Normal Operating Range (Moderately Severe) heavy-equipment Minor View →
5-13 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 5 FMI 13 - Inlet Manifold Air Temperature Sensor Out of Calibration heavy-equipment Minor View →
CID-1-FMI-2 Caterpillar CAT Electronic Control Module Caterpillar CID 1 FMI 2 - Engine Oil Pressure: Data Erratic, Intermittent, or Incorrect heavy-equipment Major View →
CID-7-FMI-3 Caterpillar CAT Electronic Control Module Caterpillar CID 7 FMI 3 - Intake Manifold Air Temperature: Voltage Above Normal, or Shorted to High Source heavy-equipment Minor View →
68-0 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 68 FMI 0 - Turbocharger Compressor Outlet Temperature Data Valid But Above Normal Range heavy-equipment Major View →
CID-16-FMI-1 Caterpillar CAT Electronic Control Module Caterpillar CID 16 FMI 1 - Fuel Injector #2: Data Valid But Below Normal Operational Range heavy-equipment Major View →
271-18 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 271 FMI 18 - Transmission Oil Pressure Sensor Data Valid But Below Normal Operating Range (Moderately Severe) heavy-equipment Minor View →
CID-164-FMI-13 Caterpillar CAT Electronic Control Module Caterpillar CID 164 FMI 13 - Pedal Position #2: Out of Calibration heavy-equipment Minor View →
CID-91-FMI-3 Caterpillar CAT Electronic Control Module Caterpillar CID 91 FMI 3 - Engine Serial Number: Voltage Above Normal, or Shorted to High Source heavy-equipment Major View →
17-6 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 17 FMI 6 - Alternator (Battery Voltage) Current Above Normal/Grounded Circuit heavy-equipment Major View →
401-5 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 401 FMI 5 - Alternator Not Charging Current Below Normal/Open Circuit heavy-equipment Major View →
CID-15-FMI-3 Caterpillar CAT Electronic Control Module Caterpillar CID 15 FMI 3 - Fuel Injector #1: Voltage Above Normal, or Shorted to High Source heavy-equipment Major View →
CID-75-FMI-3 Caterpillar CAT Electronic Control Module Caterpillar CID 75 FMI 3 - Actual Throttle Position: Voltage Above Normal, or Shorted to High Source heavy-equipment Major View →
CID-74-FMI-8 Caterpillar CAT Electronic Control Module Caterpillar CID 74 FMI 8 - Desired Throttle Position: Abnormal Frequency, Pulse Width, or Period heavy-equipment Major View →
CID-144-FMI-8 Caterpillar CAT Electronic Control Module Caterpillar CID 144 FMI 8 - Swing Angle: Abnormal Frequency, Pulse Width, or Period heavy-equipment Minor View →
252-0 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 252 FMI 0 - Fuel Injector (Cylinder 2) Data Valid But Above Normal Range heavy-equipment Major View →
CID-36-FMI-2 Caterpillar CAT Electronic Control Module Caterpillar CID 36 FMI 2 - Air Conditioning Pressure: Data Erratic, Intermittent, or Incorrect heavy-equipment Minor View →
241-1 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 241 FMI 1 - Engine Speed-Timing Sensor (Camshaft) Data Valid But Below Normal Range heavy-equipment Major View →
351-18 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 351 FMI 18 - Radiator Coolant Pressure Sensor Data Valid But Below Normal Operating Range (Moderately Severe) heavy-equipment Minor View →
58-4 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 58 FMI 4 - Analog Temperature Sensor Voltage Below Normal/Shorted Low heavy-equipment Major View →
10-8 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 10 FMI 8 - Fuel Pressure Sensor Abnormal Frequency/Pulse Width heavy-equipment Major View →
291-0 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 291 FMI 0 - Transmission Temperature Sensor Data Valid But Above Normal Range heavy-equipment Major View →
351-13 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 351 FMI 13 - Radiator Coolant Pressure Sensor Out of Calibration heavy-equipment Minor View →
CID-162-FMI-3 Caterpillar CAT Electronic Control Module Caterpillar CID 162 FMI 3 - Joystick Position #4: Voltage Above Normal, or Shorted to High Source heavy-equipment Minor View →
336-8 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 336 FMI 8 - Hydraulic Pump Pressure Sensor Abnormal Frequency/Pulse Width heavy-equipment Major View →
4-4 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 4 FMI 4 - Engine Coolant Temperature Sensor Voltage Below Normal/Shorted Low heavy-equipment Major View →
CID-167-FMI-4 Caterpillar CAT Electronic Control Module Caterpillar CID 167 FMI 4 - Travel Mode Switch: Voltage Below Normal, or Shorted to Low Source heavy-equipment Minor View →
CID-69-FMI-5 Caterpillar CAT Electronic Control Module Caterpillar CID 69 FMI 5 - Fuel Level: Current Below Normal, or Open Circuit heavy-equipment Minor View →
CID-7-FMI-4 Caterpillar CAT Electronic Control Module Caterpillar CID 7 FMI 4 - Intake Manifold Air Temperature: Voltage Below Normal, or Shorted to Low Source heavy-equipment Minor View →
CID-115-FMI-2 Caterpillar CAT Electronic Control Module Caterpillar CID 115 FMI 2 - Final Drive Oil Temperature: Data Erratic, Intermittent, or Incorrect heavy-equipment Minor View →
CID-187-FMI-5 Caterpillar CAT Electronic Control Module Caterpillar CID 187 FMI 5 - Attachment Direction: Current Below Normal, or Open Circuit heavy-equipment Minor View →
41-6 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 41 FMI 6 - Air Inlet Heater Relay Current Above Normal/Grounded Circuit heavy-equipment Major View →
1-1 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 1 FMI 1 - Mechanical Engine Speed Sensor Data Valid But Below Normal Range heavy-equipment Major View →
CID-6-FMI-4 Caterpillar CAT Electronic Control Module Caterpillar CID 6 FMI 4 - Engine Oil Temperature: Voltage Below Normal, or Shorted to Low Source heavy-equipment Major View →
CID-137-FMI-4 Caterpillar CAT Electronic Control Module Caterpillar CID 137 FMI 4 - Bucket Position Sensor: Voltage Below Normal, or Shorted to Low Source heavy-equipment Minor View →
CID-38-FMI-3 Caterpillar CAT Electronic Control Module Caterpillar CID 38 FMI 3 - Starter Relay: Voltage Above Normal, or Shorted to High Source heavy-equipment Major View →
415-8 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 415 FMI 8 - Engine Oil Level (Low) Abnormal Frequency/Pulse Width heavy-equipment Major View →
190-1 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 190 FMI 1 - Engine Speed (RPM) Data Valid But Below Normal Range heavy-equipment Major View →
CID-159-FMI-4 Caterpillar CAT Electronic Control Module Caterpillar CID 159 FMI 4 - Joystick Position #1: Voltage Below Normal, or Shorted to Low Source heavy-equipment Minor View →
CID-193-FMI-3 Caterpillar CAT Electronic Control Module Caterpillar CID 193 FMI 3 - Work Tool Position: Voltage Above Normal, or Shorted to High Source heavy-equipment Minor View →
20-5 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 20 FMI 5 - Injection Actuation Pressure Control Valve Current Below Normal/Open Circuit heavy-equipment Major View →
CID-62-FMI-4 Caterpillar CAT Electronic Control Module Caterpillar CID 62 FMI 4 - EGR Differential Pressure: Voltage Below Normal, or Shorted to Low Source heavy-equipment Major View →
227-0 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 227 FMI 0 - Injection Actuation Pressure (Low) Data Valid But Above Normal Range heavy-equipment Major View →
CID-15-FMI-0 Caterpillar CAT Electronic Control Module Caterpillar CID 15 FMI 0 - Fuel Injector #1: Data Valid But Above Normal Operational Range heavy-equipment Major View →
CID-182-FMI-3 Caterpillar CAT Electronic Control Module Caterpillar CID 182 FMI 3 - Auxiliary Hydraulic Flow: Voltage Above Normal, or Shorted to High Source heavy-equipment Minor View →
20-1 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 20 FMI 1 - Injection Actuation Pressure Control Valve Data Valid But Below Normal Range heavy-equipment Major View →
371-0 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 371 FMI 0 - Fuel Filter Differential Pressure Switch Data Valid But Above Normal Range heavy-equipment Major View →
401-2 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 401 FMI 2 - Alternator Not Charging Data Erratic/Intermittent heavy-equipment Minor View →
6-1 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 6 FMI 1 - Engine Speed-Timing Sensor (Duty Cycle) Data Valid But Below Normal Range heavy-equipment Major View →
44-16 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 44 FMI 16 - Engine Warning Indicator Data Valid But Above Normal Operating Range (Moderately Severe) heavy-equipment Minor View →
CID-79-FMI-5 Caterpillar CAT Electronic Control Module Caterpillar CID 79 FMI 5 - Engine Speed Sensor: Current Below Normal, or Open Circuit heavy-equipment Critical View →
421-13 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 421 FMI 13 - Transmission Oil Level (Low) Out of Calibration heavy-equipment Minor View →
291-17 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 291 FMI 17 - Transmission Temperature Sensor Data Valid But Below Normal Operating Range (Least Severe) heavy-equipment Info View →
CID-124-FMI-6 Caterpillar CAT Electronic Control Module Caterpillar CID 124 FMI 6 - Pilot Pressure: Current Above Normal, or Grounded Circuit heavy-equipment Minor View →
CID-198-FMI-3 Caterpillar CAT Electronic Control Module Caterpillar CID 198 FMI 3 - Work Tool Filter Status: Voltage Above Normal, or Shorted to High Source heavy-equipment Minor View →
CID-143-FMI-4 Caterpillar CAT Electronic Control Module Caterpillar CID 143 FMI 4 - Bucket Angle: Voltage Below Normal, or Shorted to Low Source heavy-equipment Minor View →
CID-43-FMI-6 Caterpillar CAT Electronic Control Module Caterpillar CID 43 FMI 6 - High Idle Speed: Current Above Normal, or Grounded Circuit heavy-equipment Major View →
CID-100-FMI-3 Caterpillar CAT Electronic Control Module Caterpillar CID 100 FMI 3 - Average Fuel Rate: Voltage Above Normal, or Shorted to High Source heavy-equipment Minor View →
CID-66-FMI-3 Caterpillar CAT Electronic Control Module Caterpillar CID 66 FMI 3 - Engine Brake Solenoid #3: Voltage Above Normal, or Shorted to High Source heavy-equipment Major View →
271-8 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 271 FMI 8 - Transmission Oil Pressure Sensor Abnormal Frequency/Pulse Width heavy-equipment Major View →
CID-195-FMI-4 Caterpillar CAT Electronic Control Module Caterpillar CID 195 FMI 4 - Work Tool Cycle Count: Voltage Below Normal, or Shorted to Low Source heavy-equipment Minor View →
CID-58-FMI-6 Caterpillar CAT Electronic Control Module Caterpillar CID 58 FMI 6 - DEF Pump: Current Above Normal, or Grounded Circuit heavy-equipment Major View →
271-16 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 271 FMI 16 - Transmission Oil Pressure Sensor Data Valid But Above Normal Operating Range (Moderately Severe) heavy-equipment Minor View →
CID-127-FMI-6 Caterpillar CAT Electronic Control Module Caterpillar CID 127 FMI 6 - Boom Cylinder Rod Pressure: Current Above Normal, or Grounded Circuit heavy-equipment Minor View →
CID-90-FMI-0 Caterpillar CAT Electronic Control Module Caterpillar CID 90 FMI 0 - Crankcase Breather Filter: Data Valid But Above Normal Operational Range heavy-equipment Minor View →
CID-10-FMI-3 Caterpillar CAT Electronic Control Module Caterpillar CID 10 FMI 3 - Coolant Loss: Voltage Above Normal, or Shorted to High Source heavy-equipment Major View →
2-4 Caterpillar Caterpillar Heavy Equipment Caterpillar CID 2 FMI 4 - Engine Speed-Timing Sensor Voltage Below Normal/Shorted Low heavy-equipment Major View →
CID-142-FMI-6 Caterpillar CAT Electronic Control Module Caterpillar CID 142 FMI 6 - Stick Angle: Current Above Normal, or Grounded Circuit heavy-equipment Minor View →