All Volvo / Mack Fault Codes
117 Volvo / Mack diesel fault codes. Click any code for causes, diagnostics, severity, and common fixes.
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
VOLVO-MACK-SPN100-FMI1 critical
Engine Oil Pressure Extremely Low (Shutdown)
VOLVO-MACK-SPN190-FMI0 critical
Engine Overspeed Above Normal
VOLVO-PENTA-100-1 critical
Engine Oil Pressure Below Safe Limit Shutdown
VOLVO-PENTA-110-0 critical
Coolant Temperature High Shutdown Triggered
VOLVO-PENTA-190-0 critical
Engine Overspeed Shutdown, ECM Cut Fuel
VOLVO-PENTA-BILGE-WATER-HIGH critical
Bilge Water Level High Alert Via EVC
VOLVO-PENTA-EXHAUST-TEMP-HIGH critical
Exhaust Gas Temperature Exceeded Safe Operating Limit
VOLVO-PENTA-SEAWATER-PUMP critical
Seawater Cooling Pump Failure Detected
VOLVO-MACK-DEF-DOSER-CRYSTALLIZATION serious
DEF Doser Injector Urea Crystallization Clog
VOLVO-MACK-DPF-REGEN-FAIL serious
DPF Forced Regen Failure — Derate Countdown Active
VOLVO-MACK-MID128-PID110-FMI16 serious
Coolant Temperature High (EGR Cooler Leak Suspected)
VOLVO-MACK-MID128-PID1569-FMI0 serious
Engine Fuel Rail Pressure Very High
VOLVO-MACK-MID128-PID1569-FMI1 serious
Engine Fuel Rail Pressure Very Low
VOLVO-MACK-MID128-PID1569-FMI2 serious
Engine Fuel Rail Pressure Erratic
VOLVO-MACK-MID128-PID2791-FMI5 serious
EGR Valve Position Control Circuit Open
VOLVO-MACK-MID128-PID2791-FMI6 serious
EGR Valve Position Control Circuit Shorted
VOLVO-MACK-MID128-PID2791-FMI7 serious
EGR Valve Not Responding to Command (Carbon Stuck)
VOLVO-MACK-MID128-PID3216-FMI12 serious
NOx Inlet Sensor Internal Fault
VOLVO-MACK-MID128-PID3216-FMI2 serious
NOx Inlet Sensor (SCR Upstream) Data Erratic
VOLVO-MACK-MID128-PID3216-FMI9 serious
NOx Inlet Sensor Communication Fault
VOLVO-MACK-MID128-PID3226-FMI12 serious
NOx Outlet Sensor Internal Fault
VOLVO-MACK-MID128-PID3226-FMI2 serious
NOx Outlet Sensor (SCR Downstream) Data Erratic
VOLVO-MACK-MID128-PID3226-FMI9 serious
NOx Outlet Sensor Communication Fault
VOLVO-MACK-MID128-PID3251-FMI0 serious
DPF Differential Pressure Very High
VOLVO-MACK-MID128-PID3251-FMI1 serious
DPF Differential Pressure Very Low (Broken/Bypassed)
VOLVO-MACK-MID128-PID3361-FMI5 serious
DEF Doser/Injector Circuit Open
VOLVO-MACK-MID128-PID3361-FMI6 serious
DEF Doser/Injector Circuit Shorted
VOLVO-MACK-MID128-PID3361-FMI7 serious
DEF Doser Not Responding (Clogged or Crystallized)
VOLVO-MACK-MID128-PID3364-FMI18 serious
DEF Quality Poor — Contamination or Dilution Detected
VOLVO-MACK-MID128-PID3719-FMI0 serious
Diesel Particulate Filter Soot Load Very High — Service Regen Required
VOLVO-MACK-MID128-PID651-FMI5 serious
Injector Cylinder 1 Circuit Current Below Normal / Open
VOLVO-MACK-MID128-PID651-FMI6 serious
Injector Cylinder 1 Circuit Current Above Normal / Short
VOLVO-MACK-MID128-PID651-FMI7 serious
Injector Cylinder 1 Mechanical System Not Responding (Balance Fault)
VOLVO-MACK-MID128-PID652-FMI5 serious
Injector Cylinder 2 Circuit Current Below Normal / Open
VOLVO-MACK-MID128-PID652-FMI6 serious
Injector Cylinder 2 Circuit Current Above Normal / Short
VOLVO-MACK-MID128-PID652-FMI7 serious
Injector Cylinder 2 Mechanical System Not Responding (Balance Fault)
VOLVO-MACK-MID128-PID653-FMI5 serious
Injector Cylinder 3 Circuit Current Below Normal / Open
VOLVO-MACK-MID128-PID653-FMI6 serious
Injector Cylinder 3 Circuit Current Above Normal / Short
VOLVO-MACK-MID128-PID653-FMI7 serious
Injector Cylinder 3 Mechanical System Not Responding (Balance Fault)
VOLVO-MACK-MID128-PID654-FMI5 serious
Injector Cylinder 4 Circuit Current Below Normal / Open
VOLVO-MACK-MID128-PID654-FMI6 serious
Injector Cylinder 4 Circuit Current Above Normal / Short
VOLVO-MACK-MID128-PID654-FMI7 serious
Injector Cylinder 4 Mechanical System Not Responding (Balance Fault)
VOLVO-MACK-MID128-PID655-FMI5 serious
Injector Cylinder 5 Circuit Current Below Normal / Open
VOLVO-MACK-MID128-PID655-FMI6 serious
Injector Cylinder 5 Circuit Current Above Normal / Short
VOLVO-MACK-MID128-PID655-FMI7 serious
Injector Cylinder 5 Mechanical System Not Responding (Balance Fault)
VOLVO-MACK-MID128-PID656-FMI5 serious
Injector Cylinder 6 Circuit Current Below Normal / Open
VOLVO-MACK-MID128-PID656-FMI6 serious
Injector Cylinder 6 Circuit Current Above Normal / Short
VOLVO-MACK-MID128-PID656-FMI7 serious
Injector Cylinder 6 Mechanical System Not Responding (Balance Fault)
VOLVO-MACK-MID128-PID723-FMI2 serious
Engine Camshaft Speed Signal Erratic
VOLVO-MACK-MID128-PID723-FMI8 serious
Engine Camshaft Position Signal Abnormal
VOLVO-MACK-MID136-PID791-FMI5 serious
ABS Modulator Valve Circuit Open
VOLVO-MACK-MID140-PID168-FMI3 serious
Battery Supply Voltage Above Normal
VOLVO-MACK-MID140-PID168-FMI4 serious
Battery Supply Voltage Below Normal
VOLVO-MACK-MID140-PID248-FMI9 serious
J1587/J1939 Data Link Communication Lost
VOLVO-MACK-MID216-PID123-FMI5 serious
Clutch Actuator Circuit Open
VOLVO-MACK-MID216-PID124-FMI5 serious
Shift Actuator Circuit Open
VOLVO-MACK-MID216-PID161-FMI2 serious
Transmission Input Shaft Speed Erratic
VOLVO-MACK-MID216-PID191-FMI2 serious
Transmission Output Shaft Speed Erratic
VOLVO-MACK-MP8-EGR-COOLER-COOLANT-LEAK serious
D13/MP8 EGR Cooler Coolant Leak (Common High-Mileage Failure)
VOLVO-MACK-NOX-SENSOR-FAILURE serious
NOx Inlet or Outlet Sensor Failure (200K+ Mile Normal Wear)
VOLVO-MACK-SPN102-FMI0 serious
Turbocharger Boost Pressure Above Normal
VOLVO-MACK-SPN102-FMI1 serious
Turbocharger Boost Pressure Below Normal
VOLVO-MACK-SPN110-FMI16 serious
Engine Coolant Temperature High — EGR Cooler Leak (J1939)
VOLVO-MACK-SPN3216-FMI20 serious
SCR Inlet NOx Sensor Drift High (J1939)
VOLVO-MACK-SPN3226-FMI20 serious
SCR Outlet NOx Sensor Drift High (J1939)
VOLVO-MACK-SPN3361-FMI5 serious
DEF Dosing Valve Circuit Open (J1939)
VOLVO-MACK-SPN4364-FMI18 serious
SCR Conversion Efficiency Low (J1939)
VOLVO-MACK-SPN651-FMI5 serious
Injector Cylinder 1 Circuit Open (J1939)
VOLVO-MACK-SPN656-FMI5 serious
Injector Cylinder 6 Circuit Open (J1939)
VOLVO-PENTA-110-15 serious
Coolant Temperature High Warning Active
VOLVO-PENTA-190-8 serious
Crankshaft Speed Sensor Signal Abnormal
VOLVO-PENTA-3251-15 serious
DPF Differential Pressure Sensor Reading High
VOLVO-PENTA-639-14 serious
EVC CAN Bus Off Fault Detected
VOLVO-PENTA-OIL-LEVEL-LOW serious
Engine Oil Level Low in Sump
VOLVO-MACK-MID128-PID100-FMI3 moderate
Engine Oil Pressure Sensor Voltage Above Normal
VOLVO-MACK-MID128-PID100-FMI4 moderate
Engine Oil Pressure Sensor Voltage Below Normal
VOLVO-MACK-MID128-PID102-FMI10 moderate
Turbo Boost Pressure Erratic, Intermittent, or Incorrect
VOLVO-MACK-MID128-PID102-FMI3 moderate
Turbo Boost Pressure Sensor Voltage Above Normal
VOLVO-MACK-MID128-PID102-FMI4 moderate
Turbo Boost Pressure Sensor Voltage Below Normal
VOLVO-MACK-MID128-PID105-FMI3 moderate
Intake Manifold Temperature Sensor Voltage Above Normal
VOLVO-MACK-MID128-PID105-FMI4 moderate
Intake Manifold Temperature Sensor Voltage Below Normal
VOLVO-MACK-MID128-PID110-FMI3 moderate
Coolant Temperature Sensor Voltage Above Normal
VOLVO-MACK-MID128-PID110-FMI4 moderate
Coolant Temperature Sensor Voltage Below Normal
VOLVO-MACK-MID128-PID2791-FMI3 moderate
EGR Valve Position Sensor Voltage Above Normal
VOLVO-MACK-MID128-PID2791-FMI4 moderate
EGR Valve Position Sensor Voltage Below Normal
VOLVO-MACK-MID128-PID3251-FMI2 moderate
DPF Differential Pressure Sensor Erratic
VOLVO-MACK-MID128-PID3251-FMI4 moderate
DPF Differential Pressure Sensor Voltage Below Normal
VOLVO-MACK-MID128-PID3362-FMI2 moderate
DEF Tank Level Sensor Data Erratic
VOLVO-MACK-MID128-PID3363-FMI16 moderate
DEF Tank Heater Not Reaching Temperature
VOLVO-MACK-MID128-PID3719-FMI16 moderate
DPF Soot Load High — Passive Regen Not Keeping Up
VOLVO-MACK-MID136-PID789-FMI2 moderate
ABS Wheel Speed Sensor Erratic (Front Axle)
VOLVO-MACK-MID136-PID789-FMI5 moderate
ABS Wheel Speed Sensor Circuit Open (Front Axle)
VOLVO-MACK-MID136-PID790-FMI2 moderate
ABS Wheel Speed Sensor Erratic (Rear Axle)
VOLVO-MACK-MID140-PID84-FMI2 moderate
Vehicle Speed Signal Erratic (Cluster)
VOLVO-MACK-MID216-PID177-FMI3 moderate
Transmission Oil Temperature Voltage Above Normal
VOLVO-MACK-MID216-PID177-FMI4 moderate
Transmission Oil Temperature Voltage Below Normal
VOLVO-MACK-SPN110-FMI3 moderate
Engine Coolant Temperature Sensor Voltage Above Normal (J1939)
VOLVO-MACK-SPN3251-FMI16 moderate
DPF Differential Pressure Higher Than Normal (J1939)
VOLVO-PENTA-168-3 moderate
Battery Voltage Above Upper Limit Detected
VOLVO-PENTA-168-4 moderate
Battery Voltage Below Cranking Threshold Detected
VOLVO-PENTA-1761-1 moderate
DEF Tank Level Low Warning Active
VOLVO-PENTA-FUEL-LEVEL-LOW moderate
Fuel Level Below Warning Threshold Detected
VOLVO-PENTA-TROLLING-MODE-FAULT moderate
Trolling Mode Disabled, Clutch or Hydraulic Fault
VOLVO-MACK-MID128-PID108-FMI3 minor
Barometric Pressure Sensor Voltage Above Normal
VOLVO-MACK-MID128-PID108-FMI4 minor
Barometric Pressure Sensor Voltage Below Normal
VOLVO-MACK-MID128-PID174-FMI3 minor
Fuel Temperature Sensor Voltage Above Normal
VOLVO-MACK-MID128-PID174-FMI4 minor
Fuel Temperature Sensor Voltage Below Normal
VOLVO-MACK-MID136-PID792-FMI5 minor
ABS Warning Lamp Circuit Open
VOLVO-MACK-MID140-PID96-FMI3 minor
Fuel Level Sensor Voltage Above Normal
VOLVO-MACK-MID140-PID96-FMI4 minor
Fuel Level Sensor Voltage Below Normal
VOLVO-MACK-VALVE-LASH-INTERVAL minor
Valve Lash Adjustment Interval Due (Volvo/Mack Preventive Service)