Mack Fault Codes. TROUBLESHOOTING

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MACK FAULT CODEIDENTIFICATION TABLE

Definitions

MID (Message Identification Description):

Identification of ECU

  • The MID identifies which ECU is broadcasting the code.
  • Example: MID 128 indicates that the code is being broadcasted by the Engine Management System (EMS) Module.

SID (Subsystem Identification Description):

Identification of component

  • The SID describes the fault code.
  • Example: SID 1 represents a failure with the Fuel Injector Unit #1.

FMI (Failure Mode Identifier): Identification of

parameter value

  • The FMI specifically defines the fault.
  • Example: FMI 7 indicates that the mechanical system is not responding or may be out of adjustment.

Emissions Fault Code

Component/Function

"FMI Codes"

MID 128 PID 81

Particulate Trap Differential Pressure

0, 2, 3, 5, 12

MID 128 PID 94

Fuel Pressure

1, 3, 5, 7

MID 128 PID 102

Boost Pressure

0, 2, 3, 5, 11

MID 128 PID 103

Turbo Speed

0, 1, 9

MID 128 PID 105

Boost Temperature

2, 4, 5, 10

MID 128 PID 108

Ambient Pressure

2, 3, 4

MID 128 PID 110

Coolant Temperature

0, 2, 4, 5, 10

MID 128 PID 153

Crankcase Pressure

0, 1, 2, 3, 5

MID 128 PID 171

Ambient Air Temperature

9

MID 128 PID 173

Exhaust Gas Temperature Sensor #1

0, 2, 4, 5, 10

MID 128 PID 354

Relative Air Humidity

3, 5

MID 128 PID 404

Compressor Discharge Temperature

0

MID 128 PID 411

EGR Differential Pressure

2, 3, 5

MID 128 PID 412

EGR Temperature After Cooler

0, 4, 5, 10

MID 128 PPID 35

EGR Mass Flow

0, 1

MID 128 PPID 89

VGT SRA Temperature

0

MID 128 PPID 122

Vehicle Compression Brake (VCB)

1, 3, 4, 5

MID 128 PPID 272

Air Temperature For Humidity Compensation

4, 5

MID 128 PPID 326

Soot Level

0, 11, 14

MID 128 PPID 328

After Treatment Injection Shut-off Valve

3, 4, 5, 7, 14

MID 128 PPID 329

After Treatment Fuel Injector

3, 4, 5, 7, 14

MID 128 PPID 387

Exhaust Gas Temperature Sensor #2

2, 4, 5, 10

MID 128 PPID 436

Exhaust Gas Temperature Sensor #3

0, 2, 4, 5, 10

MID 128 PPID 437

After Treatment Injector Fuel Pressure

3, 4, 5, 7, 14

MID 128 PSID 98

Boost Air System

0, 1

MID 128 PSID 109

Coolant Temperature

7, 12

MID 128 SID 1

Injector #1

3, 5, 7, 12, 14

MID 128 SID 2

Injector #2

3, 5, 7, 12, 14

MID 128 SID 3

Injector #3

3, 5, 7, 12, 14

MID 128 SID 4

Injector #4

3, 5, 7, 12, 14

MID 128 SID 5

Injector #5

3, 5, 7, 12, 14

MID 128 SID 6

Injector #6

3, 5, 7, 12, 14

MID 128 SID 21

Camshaft Speed Sensor

2, 3, 8

MID 128 SID 22

Crankshaft Speed Sensor

2, 3, 8

MID 128 SID 27

Variable Geometry Turbocharger Actuator #1

2, 4, 7, 9, 13

MID 128 SID 33

Cooling Fan Control

3, 4, 5

MID 128 SID 146

EGR Valve 1

3, 5, 7, 12

MID 128 SID 211

5V Supply 2

3, 4

MID 128 SID 230

Buffered IVS

3, 5

MID 128 SID 232

5V Supply 1

3, 4

MID 144 PID 72

Output Supply #1

3, 4

MID 144 PID 73

Output Supply #2

3, 4

MID 144 PID 84 (with Tachometer)

Road Speed

2

MID 144 PID 84

Road Speed

2

MID 144 PID 91

Percent Accelerator Pedal Position

3, 4, 5, 6, 14

MID 144 PPID 61

Engine Retarder Switch

7

MID 144 PPID 69

Buffered Idle Validation Switch #1 output

3, 4

MID 144 PPID 70

Output Supply #3

4

MID 144 PPID 71

Output Supply #4

4

MID 144 PPID 265

Vehicle Speed Sensor supply

3, 4

MID 144 PSID 2

Idle Validation Switch #2

7

MID 144 SID 230

Idle Validation Switch #1

7

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