Caterpillar Fault Codes

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100 Caterpillar diagnostic codes on file — with the full diagnosis, repair steps, and field insights open to read free, no signup required.

CodeSymptomFull fix
036-0100-01Critical engine warning. Stop Engine light will flash. Risk of seizure. View fix
036-0110-03Engine triggers high-temp warning and power derate. Possible shutdown. View fix
036-0190-08Hard starting, engine coughing, or erratic tachometer readings. View fix
110-04The ECM detects a "Short to Ground." Engine may enter an immediate severe derate or shutdown to prevent perceived overheating. View fix
110-3Temp Gauge Maxed / High Idle. View fix
12Coolant Level Sensor View fix
1250-9Remote Control Comm: Abnormal Update View fix
1250-9Remote Control Inop / Lag View fix
13Fuel Temperature Sensor View fix
15Injection Actuation Pressure (IAP) View fix
1530-6Coupler Won't Release View fix
1657-4Left Joystick Thumbwheel: Voltage Below Normal View fix
1657-4Left Tool Inop View fix
1658-4Right Tool Inop View fix
1658-4Right Joystick Thumbwheel: Voltage Below Normal View fix
215V / 8V Sensor Power Supply View fix
2265-7Machine Sluggish / Lugging View fix
2265-7Slow Hydraulic Cycle Times View fix
2265-7Pump #1 Outlet Pressure Sensor: Not Responding View fix
2266-7Erratic Main Pump Response View fix
2266-7Pump #2 Outlet Pressure Sensor: Not Responding View fix
2348-9Gauge Cluster Flash / Loss of Controls View fix
24Engine Oil Pressure Sensor View fix
2458-2No Regeneration. The machine refuses to start a "Parked Regen"; Service light flashes. View fix
247-9SAE J1939 Data Link: Abnormal Update View fix
247-9Dash Blank / Limp Mode View fix
25Boost Pressure Sensor View fix
26Atmospheric Pressure Sensor View fix
27Coolant Temperature Sensor View fix
28Throttle Position Calibration View fix
3183-2Regen Inop / Fault Lamp View fix
3183-2Aftertreatment Regeneration Device: Erratic View fix
32Throttle Position Signal View fix
3216-20Regen Inop View fix
34Engine Speed Signal View fix
3413-5Fuel Lift Pump Failure View fix
3413-5Regen Fails / Engine Derate View fix
3413-5Rough Run / Miss View fix
3427-5Active Regen Disabled / E1025 Derate. View fix
3464-16Engine Hesitation. View fix
35Engine Overspeed Warning View fix
3510-3Multiple Faults View fix
37Fuel Pressure Sensor View fix
3714-0Severe Engine Derate / Countdown View fix
38Intake Manifold Air Temp View fix
39IAP System Fault View fix
42Engine Timing Calibration View fix
46Low Oil Pressure View fix
51ECM Battery Power View fix
5246-1590-Minute Derate Timer View fix
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