The Mack MP8 engine (2007–2009) became a trusted workhorse for fleets during these years, offering solid performance and durability for heavy-duty applications. This version of the MP8 focused on meeting stricter emissions standards while maintaining fuel efficiency and pulling power for long hauls.
Having quick access to your Mack MP8 fault codes can save you hours in the bay, helping you pinpoint issues faster, reduce unnecessary parts swapping, and keep your trucks moving.
Mack MP8 (2007–2009) Engine Overview
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Displacement: 12.8L
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Horsepower Range: 415–485 HP
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Torque: Up to 1,660 lb-ft
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Emissions System: EGR + DPF
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Fuel System: Common Rail Fuel Injection
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Applications: Mack Pinnacle, Granite, and other Class 8 trucks
📍 Get FREE Fault Code Information for all makes and models in Diesel Repair → Diesel Repair
Fault Codes for Mack MP8 (2007–2009)
| Fault | PID | SPN | FMI | SID | Title | |
| PID 100 FMI 1 | 100 | 1 | Engine Oil Pressure – Data Valid But Below Normal Operational Range | |||
| PID 100 FMI 3 | 100 | 3 | Engine Oil Pressure – Voltage Below Normal Or Shorted Low | |||
| PID 100 FMI 5 | 100 | 5 | Engine Oil Pressure – Current Below Normal Or Open Circuit | |||
| PID 102 FMI 0 | 102 | Intake Manifold Pressure – Data Valid But Above Normal Operational Range | ||||
| PID 102 FMI 1 | 102 | 1 | Intake Manifold Pressure – Data Valid But Below Normal Operational Range | |||
| PID 102 FMI 11 | 102 | 11 | Intake Manifold Pressure – Root Cause Not Known (Data Incorrect) | |||
| PID 102 FMI 2 | 102 | 2 | Intake Manifold Pressure – Data Erratic, Intermittent Or Incorrect | |||
| PID 102 FMI 3 | 102 | 3 | Intake Manifold Pressure – Voltage Above Normal Or Shorted To High Source | |||
| PID 102 FMI 5 | 102 | 5 | Intake Manifold Pressure – Current Below Normal Or Open Circuit | |||
| PID 103 FMI 0 | 103 | Turbo Speed – Data Valid But Above Normal Operational Range | ||||
| PID 103 FMI 1 | 103 | 1 | Turbo Speed – Data Valid But Below Normal Operational Range | |||
| PID 103 FMI 9 | 103 | 9 | Turbo Speed – Abnormal Update Rate (Missing Sensor Signal) | |||
| PID 105 FMI 0 | 105 | Intake Manifold Temperature – Data Valid But Above Normal Operational Range | ||||
| PID 105 FMI 1 | 105 | 1 | Intake Manifold Temperature – Data Valid But Below Normal Operational Range | |||
| PID 105 FMI 10 | 105 | 10 | Intake Manifold Temperature – Abnormal Rate Of Change | |||
| PID 105 FMI 2 | 105 | 2 | Intake Manifold Temperature – Data Erratic, Intermittent Or Incorrect | |||
| PID 105 FMI 4 | 105 | 4 | Intake Manifold Temperature – Voltage Below Normal Or Shorted Low | |||
| PID 105 FMI 5 | 105 | 5 | Intake Manifold Temperature – Current Below Normal Or Open Circuit | |||
| PID 108 FMI 2 | 108 | 2 | Atmospheric Pressure – Data Erratic, Intermittent Or Incorrect | |||
| PID 108 FMI 3 | 108 | 3 | Atmospheric Pressure – Voltage Above Normal Or Shorted To High Source | |||
| PID 108 FMI 4 | 108 | 4 | Atmospheric Pressure – Voltage Below Normal Or Shorted To Low Source | |||
| PID 110 FMI 0 | 110 | Coolant Temperature – Data Valid But Above Normal Operational Range | ||||
| PID 110 FMI 10 | 110 | 10 | Coolant Temperature – Abnormal Rate Of Change | |||
| PID 110 FMI 2 | 110 | 2 | Coolant Temperature – Data Erratic, Intermittent Or Incorrect | |||
| PID 110 FMI 4 | 110 | 4 | Coolant Temperature – Voltage Below Normal Or Shorted Low | |||
| PID 110 FMI 5 | 110 | 5 | Coolant Temperature – Current Below Normal Or Open Circuit | |||
| PID 111 FMI 1 | 111 | 1 | Coolant Level – Data Valid But Below Normal Operational Range | |||
| PID 111 FMI 3 | 111 | 3 | Coolant Level – Voltage Above Normal Or Shorted To High Source | |||
| PID 111 FMI 4 | 111 | 4 | Coolant Level – Voltage Below Normal Or Shorted Low | |||
| PID 111 FMI 5 | 111 | 5 | Coolant Level – Current Below Normal Or Open Circuit | |||
| PID 153 FMI 0 | 153 | Crankcase Pressure – Data Valid But Above Normal Operational Range | ||||
| PID 153 FMI 1 | 153 | 1 | Crankcase Pressure – Data Valid But Below Normal Operational Range | |||
| PID 153 FMI 2 | 153 | 2 | Crankcase Pressure – Data Erratic, Intermittent Or Incorrect | |||
| PID 153 FMI 3 | 153 | 3 | Crankcase Pressure – Voltage Above Normal Or Shorted To High Source | |||
| PID 153 FMI 5 | 153 | 5 | Crankcase Pressure – Current Below Normal Or Open Circuit | |||
| PID 171 FMI 9 | 171 | 9 | Ambient Temperature – Abnormal Update Rate | |||
| PID 173 FMI 0 | 173 | Exhaust Temperature – Data Valid But Above Normal Operational Range – Most Severe Level | ||||
| PID 173 FMI 10 | 173 | 10 | Exhaust Temperature – Abnormal Rate Of Change | |||
| PID 173 FMI 2 | 173 | 2 | Exhaust Temperature – Data Erratic, Intermittent Or Incorrect | |||
| PID 173 FMI 4 | 173 | 4 | Exhaust Temperature – Voltage Below Normal Or Shorted Low | |||
| PID 173 FMI 5 | 173 | 5 | Exhaust Temperature – Current Below Normal Or Open Circuit | |||
| PID 175 FMI 0 | 175 | Engine Oil Temperature – Data Valid But Above Normal Operational Range | ||||
| PID 175 FMI 2 | 175 | 2 | Engine Oil Temperature – Data Erratic, Intermittent Or Incorrect | |||
| PID 175 FMI 4 | 175 | 4 | Engine Oil Temperature – Voltage Below Normal Or Shorted Low | |||
| PID 175 FMI 5 | 175 | 5 | Engine Oil Temperature – Current Below Normal Or Open Circuit | |||
| PID 26 FMI 3 | 26 | 3 | Fan Speed Percent – Voltage Above Normal Or Shorted To High | |||
| PID 354 FMI 3 | 354 | 3 | Relative Humidity – Voltage Above Normal Or Shorted To High Source | |||
| PID 354 FMI 5 | 354 | 5 | Relative Humidity – Current Below Normal Or Open Circuit | |||
| PID 411 FMI 2 | 411 | 2 | EGR Exhaust Back Pressure – Data Erratic, Intermittent Or Incorrect | |||
| PID 411 FMI 3 | 411 | 3 | EGR Exhaust Back Pressure – Voltage Above Normal Or Shorted To High Source | |||
| PID 411 FMI 5 | 411 | 5 | EGR Exhaust Back Pressure – Current Below Normal Or Open Circuit | |||
| PID 412 FMI 0 | 412 | EGR Temperature – Data Valid But Above Normal Operational Range – Most Severe Level | ||||
| PID 412 FMI 10 | 412 | 10 | EGR Temperature – Abnormal Rate Of Change | |||
| PID 412 FMI 4 | 412 | 4 | EGR Temperature – Voltage Below Normal Or Shorted Low | |||
| PID 412 FMI 5 | 412 | 5 | EGR Temperature – Current Below Normal Or Open Circuit | |||
| PID 45 FMI 3 | 45 | 3 | Preheater Relay – Voltage Above Normal Or Shorted To High | |||
| PID 45 FMI 4 | 45 | 4 | Preheater Relay – Voltage Below Normal Or Shorted Low | |||
| PID 45 FMI 5 | 45 | 5 | Preheater Relay – Current Below Normal Or Open Circuit | |||
| PID 81 FMI 0 | 81 | Particulate Filter – Data Valid But Above Normal Operational Range – Most Severe Level | ||||
| PID 81 FMI 12 | 81 | 12 | Particulate Filter – Bad Intelligent Device Or Component | |||
| PID 81 FMI 2 | 81 | 2 | Particulate Filter – Date Erratic, Intermittent Or Incorrect | |||
| PID 81 FMI 3 | 81 | 3 | Particulate Filter – Voltage Above Normal or Shorted High | |||
| PID 81 FMI 5 | 81 | 5 | Particulate Filter – Current Below Normal Or Open | |||
| PID 84 FMI 9 | 84 | 9 | Vehicle Speed – Abnormal Update Rate | |||
| PID 85 FMI 9 | 85 | 9 | Cruise Control Status – Abnormal Update Rate | |||
| PID 91 FMI 9 | 91 | 9 | Accelerator Pedal Position – Abnormal Update Rate | |||
| PID 94 FMI 1 | 94 | 1 | Fuel Delivery Pressure – Pressure Critically Low | |||
| PID 94 FMI 3 | 94 | 3 | Fuel Delivery Pressure – Voltage High/Open | |||
| PID 94 FMI 5 | 94 | 5 | Fuel Delivery Pressure – Current Low/Open | |||
| PID 94 FMI 7 | 94 | 7 | Fuel Delivery Pressure – Current Low/Open | |||
| PID 97 FMI 3 | 97 | 3 | Water-in-Fuel Indicator – Voltage High / Open | |||
| PID 97 FMI 4 | 97 | 4 | Water-in-Fuel Indicator – Voltage Low | |||
| PID 98 FMI 1 | 98 | 1 | Engine Oil Level – Data Valid But Below Normal Operational Range | |||
| PID 98 FMI 4 | 98 | 4 | Engine Oil Level – Voltage Below Normal Or Shorted Low | |||
| PID 98 FMI 5 | 98 | 5 | Engine Oil Level – Current Below Normal Or Open Circuit | |||
| PPID 122 FMI 1 | 1 | Engine Compression Brake – Data Valid But Above Normal Operational Range | ||||
| PPID 122 FMI 3 | 3 | Engine Compression Brake – Voltage Above Normal Or Shorted To High Source | ||||
| PPID 122 FMI 4 | 4 | Engine Compression Brake – Voltage Below Normal Or Shorted Low | ||||
| PPID 122 FMI 5 | 5 | Engine Compression Brake – Current Below Normal Or Open Circuit | ||||
| PPID 270 FMI 10 | 10 | NOx Sensor – Abnormal Rate Of Change | ||||
| PPID 270 FMI 12 | 12 | NOx Sensor – Bad Intelligent Device Or Component | ||||
| PPID 270 FMI 13 | 13 | NOx Sensor – Out Of Calibration | ||||
| PPID 270 FMI 14 | 14 | NOx Sensor – Special Instructions | ||||
| PPID 270 FMI 2 | 2 | NOx Sensor – Data Erratic, Intermittent Or Incorrect | ||||
| PPID 270 FMI 3 | 3 | NOx Sensor – Voltage Above Normal Or Shorted To High Source | ||||
| PPID 270 FMI 5 | 5 | NOx Sensor – Current Below Normal Or Open Circuit | ||||
| PPID 270 FMI 9 | 9 | NOx Sensor – Abnormal Update Rate (Missing Sensor Signal) | ||||
| PPID 272 FMI 4 | 4 | Air Pressure Compensation – Voltage Below Normal Or Shorted To Low Source | ||||
| PPID 272 FMI 5 | 5 | Air Pressure Compensation – Current Below Normal Or Open Circuit | ||||
| PPID 326 FMI 0 | Soot Level – Data Valid But Above Normal Operational Range | |||||
| PPID 326 FMI 11 | 11 | Soot Level – Critically High Soot Load | ||||
| PPID 328 FMI 14 | 14 | After Treatment Injection Shut Off Valve – Special Instructions | ||||
| PPID 328 FMI 3 | 3 | After Treatment Injection Shut Off Valve – Voltage Above Normal Or Shorted To High Source | ||||
| PPID 328 FMI 4 | 4 | After Treatment Injection Shut Off Valve – Voltage Below Normal Or Shorted Low | ||||
| PPID 328 FMI 5 | 5 | After Treatment Injection Shut Off Valve – Current Below Normal Or Open Circuit | ||||
| PPID 328 FMI 7 | 7 | After Treatment Injection Shut Off Valve – Mechanical System Not Responding Or Out Of Adjustment | ||||
| PPID 329 FMI 14 | 14 | After Treatment Fuel Injector – Special Instructions | ||||
| PPID 329 FMI 3 | 3 | After Treatment Fuel Injector – Voltage Above Normal Or Shorted To High Source | ||||
| PPID 329 FMI 4 | 4 | After Treatment Fuel Injector – Voltage Below Normal Or Shorted Low | ||||
| PPID 329 FMI 5 | 5 | After Treatment Fuel Injector – Current Below Normal Or Open Circuit | ||||
| PPID 329 FMI 7 | 7 | After Treatment Fuel Injector – Mechanical System Not Responding Or Out Of Adjustment | ||||
| PPID 330 FMI 3 | 3 | DRV – Voltage Above Normal Or Shorted To High Source | ||||
| PPID 330 FMI 4 | 4 | DRV – Voltage Below Normal Or Shorted Low | ||||
| PPID 330 FMI 5 | 5 | DRV – Current Below Normal Or Open Circuit | ||||
| PPID 330 FMI 7 | 7 | DRV – Mechanical System Not Responding Or Out Of Adjustment | ||||
| PPID 337 FMI 0 | Ash Level – Data Valid But Above Normal Operational Range | |||||
| PPID 35 FMI 0 | EGR Mass Flow – Data Valid But Above Normal Operational Range – Most Severe Level | |||||
| PPID 35 FMI 1 | 1 | EGR Mass Flow – Data Valid But Below Normal Operational Range – Most Severe Level | ||||
| PPID 387 FMI 10 | 10 | Temperature Sensor, Catalytic Converter – Abnormal Rate Of Change | ||||
| PPID 387 FMI 2 | 2 | Temperature Sensor, Catalytic Converter – Data Erratic, Intermittent Or Incorrect | ||||
| PPID 387 FMI 4 | 4 | Temperature Sensor, Catalytic Converter – Voltage Below Normal Or Shorted Low | ||||
| PPID 387 FMI 5 | 5 | Temperature Sensor, Catalytic Converter – Current Below Normal Or Open Circuit | ||||
| PPID 436 FMI 10 | 10 | Exhaust Gas Temperature Sensor 3 – Abnormal Rate Of Change | ||||
| PPID 436 FMI 2 | 2 | Exhaust Gas Temperature Sensor 3 – Data Erratic, Intermittent Or Incorrect | ||||
| PPID 436 FMI 4 | 4 | Exhaust Gas Temperature Sensor 3 – Voltage Below Normal Or Shorted Low | ||||
| PPID 436 FMI 5 | 5 | Exhaust Gas Temperature Sensor 3 – Current Below Normal Or Open Circuit | ||||
| PPID 437 FMI 10 | 10 | After Treatment Injector Fuel Pressure Sensor – Abnormal Rate Of Change | ||||
| PPID 437 FMI 2 | 2 | After Treatment Injector Fuel Pressure Sensor – Data Erratic, Intermittent Or Incorrect | ||||
| PPID 437 FMI 3 | 3 | After Treatment Injector Fuel Pressure Sensor – Voltage Above Normal Or Shorted To High Source | ||||
| PPID 437 FMI 5 | 5 | After Treatment Injector Fuel Pressure Sensor – Current Below Normal Or Open Circuit | ||||
| PPID 89 FMI 0 | Variable Geometry Turbocharger Smart Remote Actuator Temperature – Data Valid But Above Normal Operational Range – Most Severe Level | |||||
| PSID 108 FMI 7 | 7 | After Treatment Injector System – Mechanical System Not Responding, Or Out Of Adjustment | ||||
| PSID 109 FMI 12 | 12 | Engine Coolant Temperature Sensor – Thermostat Blocked Open | ||||
| PSID 109 FMI 7 | 7 | Engine Coolant Temperature Sensor – Thermostat Blocked Closed | ||||
| PSID 47 FMI 0 | Particulate Trap Regeneration – Data Valid But Above Normal Operational Range | |||||
| PSID 47 FMI 1 | 1 | Particulate Trap Regeneration – Data Valid But Below Normal Operational Range | ||||
| PSID 47 FMI 12 | 12 | Particulate Trap Regeneration – Bad Intelligent Device Or Component | ||||
| PSID 47 FMI 8 | 8 | Particulate Trap Regeneration – Abnormal Frequency, Pulse Width Or Period | ||||
| PSID 98 FMI 0 | Boost Air System – Data Valid But Above Normal Operational Range – Most Severe Level | |||||
| PSID 98 FMI 1 | 1 | Boost Air System – Data Valid But Below Normal Operational Range – Most Severe Level | ||||
| SID 146 FMI 12 | 12 | 146 | EGR Valve 1 – Bad Intelligent Device Or Component | |||
| SID 146 FMI 3 | 3 | 146 | EGR Valve 1 – Voltage Above Normal Or Shorted To High Source | |||
| SID 146 FMI 5 | 5 | 146 | EGR Valve 1 – Current Below Normal Or Open Circuit | |||
| SID 146 FMI 7 | 7 | 146 | EGR Valve 1 – Mechanical System Not Responding Or Out Of Adjustment | |||
| SID 18 FMI 3 | 3 | 18 | Drain Valve, Water Separator – Voltage Above Normal Or Shorted To High Source | |||
| SID 18 FMI 4 | 4 | 18 | Drain Valve, Water Separator – Voltage Below Normal Or Shorted Low | |||
| SID 18 FMI 5 | 5 | 18 | Drain Valve, Water Separator – Current Below Normal Or Open Circuit | |||
| SID 1 FMI 12 | 12 | 1 | Unit Injector – Failed Device (Low Injector Hold Current) | |||
| SID 1 FMI 14 | 14 | 1 | Unit Injector – Special Instructions | |||
| SID 1 FMI 3 | 3 | 1 | Unit Injector – Voltage High/Open | |||
| SID 1 FMI 5 | 5 | 1 | Unit Injector – Current Below Normal Or Open Circuit | |||
| SID 1 FMI 7 | 7 | 1 | Unit Injector – Mechanical System Not Responding | |||
| SID 211 FMI 3 | 3 | 211 | 5-Volt DC Supply – Voltage Above Normal Or Shorted To High Source | |||
| SID 211 FMI 4 | 4 | 211 | 5-Volt DC Supply – Voltage Below Normal Or Shorted To Low Source | |||
| SID 21 FMI 2 | 2 | 21 | Engine Position Timing Sensor – Data Erratic, Intermittent Or Incorrect | |||
| SID 21 FMI 3 | 3 | 21 | Engine Position Timing Sensor – Voltage Above Normal Or Shorted To High Source | |||
| SID 21 FMI 8 | 8 | 21 | Engine Position Timing Sensor – Abnormal Frequency, Pulse Width Or Period | |||
| SID 22 FMI 2 | 2 | 22 | Engine Speed Sensor – Data Erratic, Intermittent Or Incorrect | |||
| SID 22 FMI 3 | 3 | 22 | Engine Speed Sensor – Voltage Above Normal Or Shorted To High Source | |||
| SID 22 FMI 8 | 8 | 22 | Engine Speed Sensor – Abnormal Frequency, Pulse Width Or Period | |||
| SID 230 FMI 3 | 3 | 230 | Idle Validation Switch 1 – Voltage Above Normal Or Shorted To High Source | |||
| SID 230 FMI 5 | 5 | 230 | Idle Validation Switch 1 – Current Below Normal Or Open Circuit | |||
| SID 232 FMI 3 | 3 | 232 | 5-Volt DC Supply To Sensor – Voltage Above Normal or Shorted To High Source | |||
| SID 232 FMI 4 | 4 | 232 | 5-Volt DC Supply to Sensor – Voltage Below Normal or Shorted to Low Source | |||
| SID 27 FMI 13 | 13 | 27 | Variable Geometry Turbocharger – Out Of Calibration | |||
| SID 27 FMI 2 | 2 | 27 | Variable Geometry Turbocharger – Data Erratic, Intermittent Or Incorrect | |||
| SID 27 FMI 4 | 4 | 27 | Variable Geometry Turbocharger – Voltage Below Normal Or Shorted To Low Source | |||
| SID 27 FMI 7 | 7 | 27 | Variable Geometry Turbocharger – Mechanical System Not Responding Or Out Of Adjustment | |||
| SID 27 FMI 9 | 9 | 27 | Variable Geometry Turbocharger – Abnormal Update Rate | |||
| SID 2 FMI 12 | 12 | 2 | Unit Injector – Failed Device (Low Injector Hold Current) | |||
| SID 2 FMI 14 | 14 | 2 | Unit Injector – Special Instructions | |||
| SID 2 FMI 3 | 3 | 2 | Unit Injector – Voltage High/Open | |||
| SID 2 FMI 5 | 5 | 2 | Unit Injector – Current Below Normal Or Open Circuit | |||
| SID 2 FMI 7 | 7 | 2 | Unit Injector – Mechanical System Not Responding | |||
| SID 33 FMI 3 | 3 | 33 | Fan Control – Voltage Above Normal Or Shorted To High Source | |||
| SID 33 FMI 4 | 4 | 33 | Fan Control – Voltage Below Normal Or Shorted Low | |||
| SID 33 FMI 5 | 5 | 33 | Fan Control – Current Below Normal Or Open Circuit | |||
| SID 3 FMI 12 | 12 | 3 | Unit Injector – Failed Device (Low Injector Hold Current) | |||
| SID 3 FMI 14 | 14 | 3 | Unit Injector – Special Instructions | |||
| SID 3 FMI 3 | 3 | 3 | Unit Injector – Voltage High/Open | |||
| SID 3 FMI 5 | 5 | 3 | Unit Injector – Current Below Normal Or Open Circuit | |||
| SID 3 FMI 7 | 7 | 3 | Unit Injector – Mechanical System Not Responding | |||
| SID 4 FMI 12 | 12 | 4 | Unit Injector – Failed Device (Low Injector Hold Current) | |||
| SID 4 FMI 14 | 14 | 4 | Unit Injector – Special Instructions | |||
| SID 4 FMI 3 | 3 | 4 | Unit Injector – Voltage High/Open | |||
| SID 4 FMI 5 | 5 | 4 | Unit Injector – Current Below Normal Or Open Circuit | |||
| SID 4 FMI 7 | 7 | 4 | Unit Injector – Mechanical System Not Responding | |||
| SID 5 FMI 12 | 12 | 5 | Unit Injector – Failed Device (Low Injector Hold Current) | |||
| SID 5 FMI 14 | 14 | 5 | Unit Injector – Special Instructions | |||
| SID 5 FMI 3 | 3 | 5 | Unit Injector – Voltage High/Open | |||
| SID 5 FMI 5 | 5 | 5 | Unit Injector – Current Below Normal Or Open Circuit | |||
| SID 5 FMI 7 | 7 | 5 | Unit Injector – Mechanical System Not Responding | |||
| SID 6 FMI 12 | 12 | 6 | Unit Injector – Failed Device (Low Injector Hold Current) | |||
| SID 6 FMI 14 | 14 | 6 | Unit Injector – Special Instructions | |||
| SID 6 FMI 3 | 3 | 6 | Unit Injector – Voltage High/Open | |||
| SID 6 FMI 5 | 5 | 6 | Unit Injector – Current Below Normal Or Open Circuit | |||
| SID 6 FMI 7 | 7 | 6 | Unit Injector – Mechanical System Not Responding | |||
| SID 70 FMI 3 | 3 | 70 | Preheater Element 1 – Voltage Above Normal Or Shorted To High Source | |||
| SID 70 FMI 4 | 4 | 70 | Preheater Element 1 – Voltage Below Normal Or Shorted Low | |||
| SID 70 FMI 5 | 5 | 70 | Preheater Element 1 – Current Below Normal Or Open Circuit | |||
| SID 71 FMI 3 | 3 | 71 | Preheater Element 2 – Voltage Above Normal Or Shorted To High Source | |||
| SID 71 FMI 4 | 4 | 71 | Preheater Element 2 – Voltage Below Normal Or Shorted Low | |||
| SID 71 FMI 5 | 5 | 71 | Preheater Element 2 – Current Below Normal Or Open Circuit |
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