All Diesel Fault Codes
Browse 2,575 diesel fault codes organized by engine family. Each code links to its dedicated page with causes, diagnostics, common fixes, and repair cost estimates.
CUMMINS-111 critical
ECM Critical Internal Failure
CUMMINS-115 critical
Engine Magnetic Speed/Position Lost Both of Two Signals
CUMMINS-143 critical
Oil Pressure Low - Warning
CUMMINS-151 critical
Engine Coolant Temperature High - Critical
CUMMINS-1663 critical
Aftertreatment 1 Diesel Oxidation Catalyst Missing
CUMMINS-1664 critical
Aftertreatment 1 Diesel Particulate Filter Missing
DURAMAX-B0081 critical
Deployment Commanded
DURAMAX-B1001 critical
ECU Defective
DURAMAX-P0087 critical
Fuel Rail / System Pressure Too Low
DURAMAX-P0088 critical
Fuel Rail / System Pressure Too High
DURAMAX-P0217 critical
Engine Coolant Over Temperature Condition
DURAMAX-P0524 critical
Engine Oil Pressure Too Low
POWERSTROKE-P0087-64 critical
Fuel Rail Pressure Too Low
POWERSTROKE-P0191 critical
Fuel Rail Pressure Sensor Performance
POWERSTROKE-P0192 critical
Fuel Rail Pressure Sensor Circuit Low Input
POWERSTROKE-P0193 critical
Fuel Rail Pressure Sensor Circuit High Input
POWERSTROKE-P003A serious
Turbocharger Boost Control 'A' Position Exceeded Learning Limit
POWERSTROKE-P0045 serious
Turbocharger Boost Control Circuit Open
PACCAR (186)
All 186 PACCAR codes → PACCAR-P1001 critical
Engine ECM Internal Fault
PACCAR-P1002 critical
Engine ECM Memory Checksum Error
PACCAR-P1712 critical
NOx Conversion Efficiency Stage 3 - Shutdown Imminent
PACCAR-P0087 serious
Fuel Rail Pressure Too Low
PACCAR-P0088 serious
Fuel Rail Pressure Too High
PACCAR-P0191 serious
Fuel Rail Pressure Sensor Circuit Range/Performance
CAT-CID100-FMI3 critical
Engine Oil Pressure Sensor - Voltage Above Normal (Open/Short to High)
CAT-CID100-FMI4 critical
Engine Oil Pressure Sensor - Voltage Below Normal (Short to Low)
CAT-SKIDSTEER-100-1 critical
Engine Oil Pressure Below Safe Operating Threshold
CAT-SKIDSTEER-110-0 critical
Engine Coolant Temperature High Shutdown
CAT-SKIDSTEER-190-0 critical
Engine Overspeed Shutdown, ECM Cut Fuel
CAT-SKIDSTEER-5246-15 critical
Aftertreatment Inducement Severe Derate Active
MAXXFORCE-P0087-11 critical
Fuel Rail Pressure Too Low
MAXXFORCE-P0087-13 critical
Fuel Rail Pressure Too Low
MAXXFORCE-P0087-7 critical
Fuel Rail Pressure Too Low
MAXXFORCE-P0087-DT critical
Fuel Rail Pressure Too Low
MAXXFORCE-P0088-11 critical
Fuel Rail Pressure Too High
MAXXFORCE-P0088-13 critical
Fuel Rail Pressure Too High
VOLVO-MACK-MID128-PID100-FMI1 critical
Engine Oil Pressure Data Valid But Below Normal
VOLVO-MACK-MID128-PID110-FMI0 critical
Engine Coolant Temperature Data Valid But Above Normal (Most Severe)
VOLVO-MACK-MID128-PID190-FMI2 critical
Engine Crankshaft Speed Signal Erratic
VOLVO-MACK-MID128-PID190-FMI8 critical
Engine Crankshaft Speed Signal Abnormal Frequency
VOLVO-MACK-MID216-PID127-FMI14 critical
Transmission Oil Pressure Critical
VOLVO-MACK-MP8-CYLINDER-HEAD-CRACK critical
D13/MP8 Cylinder Head Crack — Coolant Loss, Combustion Leak
Hino (70)
All 70 Hino codes → HINO-P0087 serious
Fuel Rail / System Pressure Too Low
HINO-P0088 serious
Fuel Rail / System Pressure Too High
HINO-P0089 serious
Fuel Pressure Regulator Performance
HINO-P0093 serious
Fuel System Leak Detected - Large Leak
HINO-P0191 serious
Fuel Rail Pressure Sensor Range/Performance
HINO-P0192 serious
Fuel Rail Pressure Sensor Circuit Low
ISUZU-C1025 serious
ABS Hydraulic Control Unit Valve Relay
ISUZU-C1035 serious
ABS Solenoid Valve Circuit - Front Left
ISUZU-P0087 serious
Fuel Rail / System Pressure Too Low
ISUZU-P0088 serious
Fuel Rail / System Pressure Too High
ISUZU-P0089 serious
Fuel Pressure Regulator Performance
ISUZU-P0093 serious
Fuel System Leak Detected - Large Leak
FPT Industrial (5)
All 5 FPT Industrial codes → FPT-SPN100-FMI1 critical
FPT Cursor Engine Oil Pressure Too Low (Severe)
FPT-SPN5246-FMI0 critical
FPT Cursor SCR Inducement Active (Final Stage)
FPT-SPN3251-FMI0 serious
FPT Cursor DPF Differential Pressure Too High
FPT-SPN3361-FMI5 serious
FPT Cursor DEF Doser Injector Open Circuit
FPT-SPN651-FMI5 serious
FPT Cursor Cylinder #1 Injector Open
JD-SPN100-FMI1 critical
Engine Oil Pressure - Data Valid but Below Normal Operational Range (Most Severe)
JD-SPN110-FMI0 critical
Engine Coolant Temperature - Data Valid but Above Normal (Most Severe)
JD-SPN168-FMI1 critical
Battery / ECU Power Supply Voltage - Data Valid but Below Normal Operational Range (Most Severe)
JD-SPN190-FMI0 critical
Engine Speed - Data Valid but Above Normal (Overspeed)
JD-SPN2791-FMI0 critical
EGR Valve Position - Data Valid but Above Normal Operational Range (Most Severe)
JD-SPN102-FMI16 serious
Intake Manifold Pressure High - Overboost
Kubota (137)
All 137 Kubota codes → KUBOTA-E03 critical
Engine Oil Pressure Low
KUBOTA-E04 critical
Coolant Temperature High
KUBOTA-E13 critical
Transmission Oil Pressure Low
KUBOTA-P0087 critical
Fuel Rail Pressure Too Low
KUBOTA-P0217 critical
Engine Coolant Over Temperature Condition
KUBOTA-P200C critical
Diesel Particulate Filter Over Temperature - Bank 1
KIOTI-ENGINE-OVERHEAT critical
Engine Coolant Temperature Above Safe Limit
KIOTI-LOW-OIL-PRESSURE critical
Low Engine Oil Pressure Detected During Run
KIOTI-HYD-OIL-LOW serious
Hydraulic Oil Level Low Warning Active
KIOTI-P0087 serious
Fuel Rail Pressure Below Commanded Level
KIOTI-P0088 serious
Fuel Rail Pressure Exceeded Upper Limit
KIOTI-P0299 serious
Turbocharger Underboost Condition Detected
MAHINDRA-ENGINE-OVERHEAT critical
Coolant Temperature Exceeded Safe Operating Limit
MAHINDRA-LOW-OIL-PRESSURE critical
Engine Oil Pressure Below Safe Operating Threshold
MAHINDRA-P0087 serious
Fuel Rail Pressure Below Commanded Level
MAHINDRA-P0088 serious
Fuel Rail Pressure Exceeded Upper Limit
MAHINDRA-P0299 serious
Turbocharger Underboost: Insufficient Intake Pressure
MAHINDRA-P0335 serious
Crankshaft Position Sensor Signal Lost or Erratic
MASSEY-FERGUSON-100-1 critical
Engine Oil Pressure Below Safe Operating Threshold
MASSEY-FERGUSON-110-0 critical
Engine Coolant Temperature High Shutdown
MASSEY-FERGUSON-190-0 critical
Engine Overspeed Shutdown, ECM Cut Fuel
MASSEY-FERGUSON-5246-15 critical
Aftertreatment Inducement Derate Active
MASSEY-FERGUSON-110-15 serious
Engine Coolant Temperature High Warning
MASSEY-FERGUSON-157-3 serious
Fuel Rail Pressure Sensor Voltage Too High
BOBCAT-CODE-01 critical
Bobcat Operator Display Code 01 - Engine Oil Pressure Low
BOBCAT-CODE-03 critical
Bobcat Operator Display Code 03 - Engine Coolant Temperature High
BOBCAT-CODE-12 critical
Bobcat Operator Display Code 12 - Engine Overspeed
BOBCAT-P0087 critical
Fuel Rail Pressure Too Low
BOBCAT-P0087-854E critical
Fuel Rail Pressure Too Low (Perkins 854E)
BOBCAT-P0087-D24 critical
Fuel Rail Pressure Too Low (Doosan D24)
YANMAR-LOW-OIL-PRESSURE critical
Yanmar Marine Low Oil Pressure Alarm
YANMAR-MARINE-BILGE-WATER critical
Yanmar Marine High Bilge Water Alarm
YANMAR-MARINE-EXHAUST-TEMP critical
Yanmar Marine Exhaust Elbow Over-Temp Alarm
YANMAR-OVERHEAT-MARINE critical
Yanmar Marine Overheat Alarm
YANMAR-P0087 critical
Fuel Rail Pressure Too Low
YANMAR-P0217 critical
Engine Coolant Overtemperature
Generators (Onan / Generac / Kohler / Perkins / Kubota) (117)
All 117 Generators (Onan / Generac / Kohler / Perkins / Kubota) codes → GENERAC-1300 critical
Low Oil Pressure Shutdown Detected
GENERAC-1502 critical
Engine Overspeed Shutdown Detected
GENERAC-1600 critical
High Engine Temperature Shutdown Detected
GENERAC-1601 critical
High Cylinder Head Temperature Shutdown
GENERAC-2099 critical
Alternator Rotor Excitation Failure, No AC Output
KOHLER-17 critical
Low Oil Pressure Shutdown During Engine Run
Light Towers (Allmand / Magnum / Wacker Neuson) (47)
All 47 Light Towers (Allmand / Magnum / Wacker Neuson) codes → ALLMAND-1 critical
Low Oil Pressure Shutdown Detected
ALLMAND-2 critical
High Engine Temperature Shutdown Activated
MAGNUM-1 critical
Low Oil Pressure Shutdown, Engine Protected
MAGNUM-2 critical
High Engine Temperature Shutdown Activated
WACKER-1 critical
Low Oil Pressure Shutdown Engine Protection Trip
WACKER-2 critical
High Engine Temperature Shutdown Triggered
Portable Air Compressors (Atlas Copco / Sullair / Doosan) (47)
All 47 Portable Air Compressors (Atlas Copco / Sullair / Doosan) codes → ATLAS-COPCO-E001 critical
Engine Oil Pressure Low Shutdown Triggered
ATLAS-COPCO-E002 critical
Engine Coolant Temperature High Shutdown
ATLAS-COPCO-E003 critical
Air Outlet Temperature High Shutdown Triggered
ATLAS-COPCO-E004 critical
Compressor Airend Oil Pressure Below Safe Threshold
ATLAS-COPCO-E020 critical
Engine Overspeed Shutdown Triggered
DOOSAN-E001 critical
Engine Oil Pressure Low Shutdown Detected
Aerial Lifts & Telehandlers (JLG / Genie / Skyjack / Manitou) (96)
All 96 Aerial Lifts & Telehandlers (JLG / Genie / Skyjack / Manitou) codes → GENIE-32-01 critical
Engine Coolant Temperature High Warning
GENIE-33-01 critical
Engine Oil Pressure Below Safe Operating Threshold
GENIE-TH-32-01 critical
Engine Coolant Temperature High Warning
GENIE-TH-33-01 critical
Engine Oil Pressure Below Safe Operating Threshold
JLG-100-4 critical
Engine Oil Pressure Below Safe Threshold, Shutdown Triggered
JLG-4351-15 critical
Engine Coolant Temperature Above ECM Warning Threshold
Small Engines (Briggs & Stratton / Kawasaki) (32)
All 32 Small Engines (Briggs & Stratton / Kawasaki) codes → KAWASAKI-FX-BLINK-2 critical
Low Oil Pressure Shutdown on Carbureted Engine
KAWASAKI-FX-BLINK-3 critical
Engine Overheat Shutdown High Cylinder Head Temp
BRIGGS-VANGUARD-P0122 serious
Throttle Position Sensor Voltage Below Normal Range
BRIGGS-VANGUARD-P0123 serious
Throttle Position Sensor Voltage Too High
BRIGGS-VANGUARD-P0201 serious
Cylinder 1 Fuel Injector Circuit Fault
BRIGGS-VANGUARD-P0202 serious
Cylinder 2 Injector Circuit Open or Shorted
Electric Vehicles (Tesla / Bolt) (134)
All 134 Electric Vehicles (Tesla / Bolt) codes → BOLT-P0ABB critical
HV Battery Voltage Sensor Performance Fault
BOLT-P0ABC critical
HV Battery Voltage Sensor Circuit Low Voltage
BOLT-P0AFA critical
High-Voltage Battery Pack Voltage Too Low
BOLT-P0C78 critical
HV Battery Precharge Circuit Takes Too Long
BOLT-P0D26 critical
Battery Charger Precharge Sequence Timeout Fault
BOLT-P1AE6 critical
HV Battery Isolation Sensor Circuit Fault
Starlink (30)
All 30 Starlink codes → STARLINK-ANTENNA_UNREACHABLE critical
Router Lost Communication With Dishy Antenna
STARLINK-DISH_HARDWARE_FAULT critical
Dish Internal Self-Test Failed, Hardware Fault
STARLINK-PAYMENT_FAILED critical
Subscription Payment Failed, Service Suspended
STARLINK-SUSPENDED critical
Service Suspended Due to Account Hold
STARLINK-ACCOUNT_AUTH_FAILURE serious
Dish Cannot Verify Account With Starlink Servers
STARLINK-DISCONNECTED serious
Dish Online But No Internet Uplink Detected
Other / Unmatched (41)
CARRIER-TRANSICOLD-00013 critical
High Compressor Discharge Pressure Shutdown
CARRIER-TRANSICOLD-00017 critical
High Compressor Discharge Temperature Shutdown
CARRIER-TRANSICOLD-00018 critical
Low Suction Pressure Shutdown Alarm
CARRIER-TRANSICOLD-00028 critical
Check Refrigeration System Low Delta Fault
CARRIER-TRANSICOLD-00056 critical
Evaporator Airflow Restricted or Fan Fault Detected
CARRIER-TRANSICOLD-00075 critical
Compressor Motor Overload Protector Tripped
CARRIER-TRANSICOLD-00076 critical
Condenser Fan Motor Overload Protector Tripped
CARRIER-TRANSICOLD-00077 critical
Evaporator Fan Motor Overload Protector Tripped
CARRIER-TRANSICOLD-00100 critical
Overload Or Ground Fault Detected On Electrical System
CARRIER-TRANSICOLD-00246 critical
EPROM Write Failure: Non-Volatile Memory Save Error
CARRIER-TRANSICOLD-00249 critical
APX Microprocessor Internal Control Board Fault
CARRIER-TRANSICOLD-00255 critical
APX Controller System Failure Detected
THERMO-KING-10 critical
High Discharge Pressure Compressor Shutdown
THERMO-KING-12 critical
Sensor or Digital Input Shutdown Zone
THERMO-KING-17 critical
Engine Failed to Crank on Start Attempt
THERMO-KING-18 critical
High Engine Coolant Temperature Shutdown
THERMO-KING-19 critical
Low Engine Oil Pressure Shutdown
THERMO-KING-23 critical
Cooling Cycle Fault Zone Failed to Complete
THERMO-KING-32 critical
Refrigeration Capacity Low, Zone Locked Out
THERMO-KING-509 critical
ECU Failed to Enable Engine Start Command
THERMO-KING-516 critical
I/O Controller to Application Controller Communication Failure
THERMO-KING-616 critical
Engine Overspeed Shutdown Detected
THERMO-KING-82 critical
High Compressor Discharge Temperature Shutdown
CARRIER-TRANSICOLD-00030 serious
Unit Failed to Complete Minimum Run Time