MACK Truck Fault Codes List

Service technicians have no problem recognising breakdowns and carrying out machine diagnostics, MACK Truck Fault Codes List, plus they are familiar with equipment from a variety of manufacturers.

Mack Trucks, Inc., is an American truck manufacturing company and a former manufacturer of buses and trolley buses. Founded in 1900 as the Mack Brothers Company, it manufactured its first truck in 1905 and adopted its present name in 1922. Mack Trucks is a subsidiary of AB Volvo, which purchased Mack along with its then parent company Renault Véhicules Industriels in 2000. Founded originally in Brooklyn, New York in 1900, the company’s headquarters were moved to Allentown, Pennsylvania in 1905 where they remained until 2009. In 2009, its headquarters were relocated to Greensboro, North Carolina. Mack products are produced in Lower Macungie, Pennsylvania, and Salem, Virginia, with all powertrain products produced in its Hagerstown, Maryland plant. Mack also maintains additional assembly plants in Pennsylvania, Australia, and Venezuela. The company also once maintained plants in Hayward, California and Oakville, Ontario, though both of these have been closed.

MACK V-MAC 2 Truck Fault Codes DTC

MACK Blink Code – PID – SID – FMI – Component & Failure

1–1 100 – no – 4 – engine oil pressure voltage below normal / low
1–2 100 – no – 3 – engine oil pressure voltage above normal / shorted high
1–3 108 – no – 4 – BARO voltage below normal / shorted low
1–4 108 – no – 3 – BARO voltage above normal / shorted high
1–7 111 – no – 3 – coolant level voltage above normal / shorted high
2–1 110 – no – ECT voltage below normal / shorted low
2–2 110 – no -3 – ECT voltage above normal / shorted high
2–3 105 – no- IAT voltage below normal / shorted low
2–4 105 – no – 3 – IAT voltage above normal / shorted high
2–5 102 – no – 4 – boost – air Inlet pressure – voltage below normal / shorted low
2–5 106 – no – 4 – look above (2 – 5 102)
2–6 102 – no – 3 – boost – air Inlet pressure – voltage above normal / shorted high
2–6 106 – no – 3 – look above (2–6 102)
3–2 190 – no – 2 – RPM / TDC data erratic, improper / intermittent
3–4 no – 1 – 2 – TEM sensor data erratic, improper / intermittent
3–5 no – 2 – 7 – timing actuator mechanical system response improper / misadjusted
4–1 84 – no – 4 – MPH – road speed – sensor voltage below normal / shorted low
4–2 84 – no – 3 – MPH – road speed – sensor voltage above normal / shorted high
4–3 84 – no – 8 – MPH (road speed) sensor abnormal frequency, period / pulse width
5–1 91 – no – 4 – TP sensor voltage below normal / shorted low
5–2 91 – no – 3 – TP sensor voltage above normal / shorted high
5–3 no – 4 – 5 – rack actuator current below normal / open circuit
5–4 no – 4 – 7 – rack actuator mechanical response improper / misadjusted
5–5 no – 4 – 6 – rack actuator current above normal / grounded circuit
5–6 no – 4 – 11 – rack actuator failure mode unidentifiable
6–6 no – 254 – 12 – Iinternal module communications bad Intelligent component / device
7–1 no – 246 – 4 – service brake pedal switch voltage below normal / shorted low
7–5 no – 3 – 5 – rack position sensor current below normal / open circuit
7–6 no – 3 – 6 – rack position sensor current above normal / grounded circuit
7–7 no – 3 – 11 – rack position sensor failure mode unidentifiable

MACK Truck V-MAC 3 Fault Codes DTC

circuit – blink code – serial line information PID / SID – FMI – MID

Engine Oil Pressure – low voltage / open – 1 – 1 – PID 100 FMI 4 MID 128 / 143
Engine Oil Pressure – high voltage – 1 – 1 – PID 100 – FMI 3 – MID 128 / 143
Barometric Pressure – low voltage / open – 1 – 2 – PID 108 – FMI 4 – MID 128
Barometric Pressure – high voltage – 1 – 2 – PID 108 – FMI 3 – MID 128
Fuel Temperature – low voltage – 1 – 3 – PID 174 – FMI 4 – MID 128 / 143
Fuel Temperature – high voltage – 1 – 3 – PID 174 – FMI 3 – MID 128 / 143
Fuel Temperature – current low / open – 1 – 3 – PID 174 – FMI 5 – MID 128 / 143
Ambient Temperature – low voltage – 1 – 4 – PID 171 – FMI 4 – MID 128
Ambient Temperature – high voltage – 1 – 4 PID 171 – FMI 3 – MID 128
Ambient Temperature – current low / open – 1 – 4 – PID 171 – FMI 5 – MID 128
Starter Input – high voltage – 1 – 6 – SID 237 – FMI 3 – MID 142
Coolant Level – high voltage / open – 1 – 7 – PID 111 – FMI 3 MID 128 / 143
Coolant Level Add Sensor – high voltage / open – 1 – 7 – PID 111 – FMI 5 – MID 128
Estimate Percent Fan Speed – above normal range – 1 – 8 – PID 26 – FMI 0 – MID 128
Estimate Percent Fan Speed – below normal range – 1 – 8 – PID 26 – FMI 1 – MID 128
Heated Oxygen Sensor – UEGO – 1 – 9 – SID 65 – MID 128
Aux Cooling Relay output – 1 – 10 – MID 128
Engine Coolant Temperature – low voltage – 2 – 1 – PID 110 – FMI 4 – MID 128 / 143
Engine Coolant Temperature – high voltage – 2 – 1 – PID 110 – FMI 3 – MID 128 / 143
Engine Coolant Temperature – current low / open – 2 – 1 – PID 110 – FMI 5 – MID 128 / 143
Engine Coolant Temperature – abnormal rate of change – 2 – 1 – PID 110 – FMI 10 – MID 128
Boost Pressure – low voltage / open – 2 – 2 – PID 102 – FMI 4 – MID 128 / 143
Boost Pressure – high voltage – 2 – 2 – PID 102 – FMI 3 – MID 128 / 143
Boost Pressure – extended low voltage / open – 2 – 2 – PID 439 – FMI 4 – MID 128
Boost Pressure – extended high voltage – 2 – 2 – PID 439 – FMI 3 – MID 128
Intake Manifold Temperature – low voltage – 2 – 3 – PID 105 – FMI 4 – MID 128 / 143
Intake Manifold Temperature – high voltage – 2 – 3 – PID 105 – FMI 3 – MID 128 / 143
Intake Manifold Temperature – current low / open – 2 – 3 – PID 105 – FMI 5 – MID 128 / 143
Transmission Oil Temperature – low voltage – 2 – 4 – PID 177 – FMI 4 – MID 142
Transmission Oil Temperature. – high voltage / open – 2 – 4 – PID 177 – FMI 3 – MID 142
FR Axle Oil Temperature – low voltage – 2 – 5 – PID 77 – FMI 4 – MID 142
FR Axle Oil Temperature – high voltage / open – 2 – 5 – PID 77 – FMI 3 – MID 142
RR Axle Oil Temperature – low voltage – 2 – 6 – PID 78 – FMI 4 – MID 142
RR Axle Oil Temperature – high voltage / open – 2 – 6 – PID 78 – FMI 3 – MID 142
Engine Oil Temperature – low voltage – 2 – 7 – PID 175 – FMI 4 – MID 128
Engine Oil Temperature – high voltage – 2 – 7 – PID 175 – FMI 3 – MID 128
Engine Oil Temperature – open – 2 – 7 – PID 175 – FMI 5 – MID 128
Combustion Air Temperature – low voltage – 2 – 8 – PID 172 – FMI 4 – MID 128
Combustion Air Temperature – high voltage – 2 – 8 – P 172 – FMI 3 – MID 128
Combustion Air Temperature – current low / open – 2 – 8 – P 172 – FMI 5 – MID 128
Exhaust Temperature – low voltage – 3 – 1 – PID 173 – FMI 4 – MID 142
Exhaust Temperature – high voltage – 3 – 1 – P 173 – FMI 3 – MID 142
Engine Timing Sensor – data erratic / incorrect – 3 – 2 – SID 22 – FMI 2 – MID 128 / 143
Engine Timing Sensor – abnormal frequency, PW or T – 3 – 2 – SID 22 – FMI 8 – MID 128 / 143
Redundant Engine Speed Mon – engine timing & position don’t agree – 3 – 3 – PID 190 – FMI 2 – MID 128
Engine Position Sensor – data erratic / incorrect – 3 – 4 – SID 21 – FMI 2 – MID 128 / 143
Engine Position Sensor – abnormal frequency, PW or T – 3 – 4 – SID 21 – FMI 8 – MID 128 / 143
Engine Brake Output №1 – high holtage / open – 3 – 5 -SID 79 – FMI 5 MID 128
Engine Brake Output №1 – low voltage – 3 – 5 – SID 79 – FMI 4 – MID 128
Engine Brake Output №2 – high voltage / open – 3 – 6 – SID 80 – FMI 5 – MID 128
Engine Brake Output №2 – low voltage – 3 – 6 – SID 80 – FMI 4 – MID 128
Transmission Splitter – position mechanical system not responsible – 3 – 8 – SID 152 – FMI 7 – MID 142
Transmission Splitter – position abnormal frequency, PW or T – 3 – 8 – SID 152 – FMI 8 – MID 142
Oil Condition Sensor – 3 – 9 – MID 128
Vehicle Speed – low voltage – 4 – 1 – PID 84 – FMI 4 – MID 142
Vehicle Speed – high voltage – 4 – 1 – PID 84 – FMI 3 – MID 142
Vehicle Speed – abnormal frequency, PW or T – 4 – 1 – PID 84 – FMI 8 – MID 142
Vehicle Speed – open – 4 – 1 – PID 84 – FMI 5 – MID 142
Vehicle Speed – data invalid – 4 – 1 – PID 84 – FMI 2 – MID 142
Vehicle Speed – mode not identifiable – 4 – 1 – PID 84 – FMI 11 – MID 142
Vehicle Speed – below normal – 4 – 1 – PID 84 – FMI 1 – MID 142
Fan Clutch Output – data erratic – 4 – 2 – SID 33 – FMI 2 – MID 128 / 143
Fan Clutch Output – low voltage – 4 – 2 – SID 27 – FMI 4 – MID 128 / 143
Fan Clutch Output – open – 4 – 2 – SID 33 – FMI 5 – MID 128
Fan Clutch Output – high voltage – 4 – 2 – SID 27 – FMI 3 – MID 128 / 143
Aux. Output №1 – low voltage – 4 – 3 – SID 10 – FMI 4 – MID 142
Aux Output №1 – high voltage – 4 – 3 – SID 10 – FMI 3 – MID 142
Aux Output №2 – low voltage – 4 – 4 – SID 11 – FMI 4 – MID 142
Aux Output №2 – high voltage – 4 – 4 – SID 11 – FMI 3 – MID 142
Wastegate Output – mechanical system not response – 4 – 5 – SID 32 – FMI 7 – MID 128
Wastegate Output – open – 4 – 5 – SID 32 – FMI 5 – MID 128
Wastegate Output – data erratic – 4 – 5 – SID 32 – FMI 2 – MID 128
VGT Position Sensor – mechanical system not response – 4 – 5 – SID 147 – FMI 7 – MID 128
Tachometer Output – low voltage – 4 – 6 – SID 6 – FMI 4 – MID 142
Tachometer Output – high voltage – 4 – 6 – SID 6 – FMI 3 – MID 142
Speedometer Output – low voltage – 4 – 7 – SID 7 – FMI 4 – MID 142
Speedometer Output – high voltage – 4 – 7 – SID 7 – FMI 3 – MID 142
CDS Fault – above normal – 4 – 8 – SID 151 – FMI 0 – MID 142
CDS Fault – below normal – 4 – 8 – SID 151 – FMI 1 – MID 142
CDS Fault – abnormal frequency, PW or T – 4 – 8 – Sid 151 – FMI 8 – MID 142
EGR Valve №1 – 4 – 9 – PID 27 – MID 128
Accel. Pedal Position – low voltage / open – 5 – 1 – PID 91 – FMI 4 – MID 142
Accel. Pedal Position – high voltage – 5 – 1 – PID 91 – FMI 3 – MID 142
Cummins Acceleration Pedal Position – acceleleration pedal invalid – 5 – 1 – PID 91 – FMI 2 – MID 142
Cummins Idle Validation Switch Invalid – switch position says idle, pedal says not idle – 5 – 1 – PID 91 – FMI 7 – MID 142
Cummins Idle Validation Switch Invalid – switch position says not idle, pedal says idle – 5 – 1 – PID 91 – FMI 14 – MID 142
Vref Out of Range – low voltage – 5 – 2 – SID 232 – FMI 4 – MID 142
Vref Out of Range – high voltage – 5 – 2 – SID 232 – FMI 3 – MID 142
Shutdown Lamp – low voltage -5 – 3 – SID 238 – FMI 4 – MID 142
Shutdown Lamp – high voltage – 5 – 3 – SID 238 – FMI 3 – MID 142
Fault Lamp – low voltage – 5 – 5 – SID 239 – FMI 4 – MID 142
Fault Lamp – high voltage – 5 – 5 – SID 239 – FMI 3 – MID 142
Spare Relay 3 – low voltage – 5 – 6 – SID 12 – FMI 4 – MID 142
Spare Relay 3 – high voltage – 5 – 6 – SID 12 – FMI 3 – MID 142
Engine Oil Level – low voltage – 5 – 7 – PID 98 – FMI 4 – MID 128 / 143
Engine Oil Level – high voltage – 5 – 7 PID 98 – FMI 3 – MID 128 / 143
EGR Temperature – 5 – 8 – PID 412 – MID 128
EGR Delta Pressure – 5 – 9 PID 411 – MID 128
Fuel Level – low voltage – 6 – 1 – PID 96 – FMI 4 – MID 142
Fuel Level – high voltage / open – 6 – 1 – PID 96 – FMI 3 – MID 142
Turbocharger Speed – abnormal frequency, PW or T – 6 – 2 – PID 103 – FMI 8 – MID 128
J1708/J1587 Link – abnormal frequency, PW or T – 6 – 3 – SID 250 – FMI 8 – MID 142
J1708/J1587 Link – abnormal frequency, PW or T – 6 – 3 SID 250 – FMI 8 – MID 128 / 143
J1939 Link – abnormal frequency, PW or T – 6 – 4 – SID 231 – FMI 8 – MID 142
J1939 Link – abnormal frequency, PW or T – 6 – 4 – SID 231 – FMI 8 – MID 128 / 143
All VECU Communications Lost – engine shutdown – Failed Device – 6 – 5 – SID 254 – FMI 8 – MID 128
Fuel Control Module – failed device – 6 – 6 – SID 233 – FMI 12 – MID 128 / 143
Power Relay – data erratic / incorrect – 6 – 7 -SID 236 – FMI 2 – MID 128 / 143
J1939 Link Lost – contact with tranny – 6 – 8 – SID 231 – FMI 14 – MID 142
Possible J1939 Link – other ECU failure affecting operation – 6 – 9 – SID 216 – FMI 12 – MID 142
Service Brake – low voltage – 7 – 1 – SID 246 – FMI 4 – MID 142
Parking Brake – high voltage – 7 – 2 – SID 235 – FMI 3 – MID 142
Spd Cntl Set Switch – high voltage – 7 – 3 – SID 243 – FMI 3 – MID 142
Spd Cntl Resume Switch – high voltage – 7 – 4 – SID 242 – FMI 3 – MID 142
Alternator Voltage – low voltage – 7 – 5 – PID 167 – FMI 1 – MID 142
Alternator Voltage – high voltage – 7 – 5 – PID 167 – FMI 0 – MID 142
4 Battery Voltage – low voltage – 7 – 5 – PID 168 – FMI 1 – MID 142
4 Switched Voltage – low voltage – 7 – 6 – PID 158 – FMI 4 – MID 128 / 143
5 Exhaust Temperature – reference failed device – 7 – 7 – SID 254 – FMI 12 – MID 142
9 CAC – bypass output – 7 – 8 – SID 26 – MID 128
9 VGT – actuator – 7 – 9 – SID 27 – MID 128
Injector №1 – low voltage – 8 – 1 – SID 1 – FMI 4 – MID 128 / 143
Injector №1 – high voltage – 8 – 1 – SID 1 – FMI 3 – MID 128 / 143
Injector №1 – abnormal frequency, PW or T – 8 – 1 – SID 1 – FMI 8 – MID 128 / 143
Injector №1 – data erratic – 8 – 1 – SID 1 – FMI 2 – MID 128 / 143
Injector №2 – low voltage – 8 – 2 – SID 2 – FMI 4 – MID 128 / 143
Injector №2 – high voltage – 8 – 2 – SID 2 – FMI 3 – MID 128 / 143
Injector №2 – abnormal frequency, PW or T – 8 – 2 – SID 2 – FMI 8 – MID 128 / 143
Injector №2 – data erratic – 8 – 2 – SID 2 – FMI 2 – MID 128 / 143
Injector №3 – low voltage – 8 – 3 – SID 3 – FMI 4 – MID 128 / 143
Injector №3 – high voltage – 8 – 3 – SID 3 – FMI 3 – MID 128 / 143
Injector №3 – abnormal frequency, PW or T – 8 – 3 – SID 3 – FMI 8 – MID 128 / 143
Injector №3 – data erratic – 8 – 3 – SID 3 – FMI 2 – MID 128 / 143
Injector №4 – low voltage – 8 – 4 SID 4 – FMI 4 – MID 128 / 143
Injector №4 – high voltage – 8 – 4 SID 4 – FMI 3 – MID 128 / 143
Injector №4 – abnormal frequency, PW or T – 8 – 4 – SID 4 – FMI 8 – MID 128 / 143
Injector №4 – data erratic – 8 – 4 – SID 4 – FMI 2 – MID 128 / 143
Injector №5 – low voltage – 8 – 5 – SID 5 -FMI 4 – MID 128 / 143
Injector №5 – high voltage – 8 – 5 – SID 5 – FMI 3 – MID 128 / 143
Injector №5 – abnormal frequency, PW or T – 8 – 5 – SID 5 – FMI 8 – MID 128 / 143
Injector №5 – data erratic – 8 – 5 – SID 5 – FMI 2 – MID 128 / 143
Injector №6 – low voltage – 8 – 6 – SID 6 – FMI 4 – MID 128 / 143
Injector №6 – high voltage – 8 – 6 – SID 6 – FMI 3 – MID 128 / 143
Injector №6 – abnormal frequency, PW or T – 8 – 6 – SID 6 – MID 8 – MID 128 / 143
Injector №6 – data erratic – 8 – 6 – SID 6 – FMI 2 – MID 128 / 143
System Diagnostic – Solenoid Boost Voltage – high voltage – 8 – 9 – SID 151 – FMI 3 – MID 128
System Diagnostic – Solenoid Boost Voltage – low voltage – 8 – 9 SID 151 – FMI 4 – MID 128
Transport Protocol Table – programming failure – 9 – 1 – SID 254 – FMI 14 – MID 142
Power reset without key switch – low voltage – 9 – 2 – SID 254 – FMI 4 – MID 142
Power reset without key switch – low voltage – 9 – 2 – SID 254 – FMI 4 – MID 128
Aftercooler Outlet Temperature – low voltage – 9 – 3 – FMI 4 – MID 128
Aftercooler Outlet Temperature – high voltage – 9 – 3 – FMI 3 – MID 128
Aftercooler Outlet Temperature – current low / open – 9 – 3 – FMI 5 – MID 128
Aftercooler Outlet Pressure – low voltage / open – 9 – 4 – FMI 4 – MID 128
Aftercooler Outlet Pressure – high voltage – 9 – 4 – FMI 3 – MID 128
Compressor Discharge Temperature – low voltage – 9 – 5 – FMI 4 – MID 128
Compressor Discharge Temperature – high voltage – 9 – 5 – FMI 3 – MID 128
Compressor Discharge Temperature – current low / open – 9 – 5 – FMI 5 – MID 128.

The diagnosis tool MACK Truck Fault Codes List for trucks provides different possibilities such as information on the use and location of the connectors, detection and description of errors, activation of the fan, compression test and other components, system data information and more.