The Detroit Diesel Series 60 12.7L engine built between 1999 and 2003 played a pivotal role in heavy-duty trucking, known for its long-haul dependability and fuel-efficient performance. Built with EGR components in later years and solid electronics, it delivered consistent output while offering technicians accessible diagnostic data.
With Diesel Repair, you can access fault code information for the Series 60 with ease—no flipping through manuals or sifting through outdated charts.
Detroit Diesel Series 60 12.7L (1999–2003) Engine Overview
- Displacement: 12.7L
- Horsepower Range: 350–500 HP
- Torque: Up to 1,650 lb-ft
- Emissions System: EGR (from 2002 models onward)
- Fuel System: Unit Injection System (UIS)
- Applications: Freightliner Century, Columbia, Western Star, and more
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Fault Codes for Detroit Diesel Series 60 12.7L (1999–2003)
| Fault | PID | SPN | FMI | SID | Title |
| 11 | 187 | 4 | Variable Speed Governor (VSG) Input Low | ||
| 12 | 187 | 3 | Variable Speed Governor (VSG) Input High | ||
| 13 | 111 | 4 | Coolant Level Circuit Low | ||
| 13 | 111 | 6 | ACLS Failed Low | ||
| 14 | 110 | 3 | Coolant Temperature Circuit High | ||
| 14 | 175 | 3 | Oil Temperature Circuit High | ||
| 15 | 110 | 4 | Coolant Temperature Circuit Low | ||
| 15 | 175 | 4 | Oil Temperature Circuit Low | ||
| 16 | 111 | 3 | Coolant Level Circuit High | ||
| 16 | 111 | 5 | ACLS Circuit High | ||
| 17 | 51 | 3 | Throttle Plate Input Voltage High | ||
| 17 | 354 | 3 | Relative Humidity Sensor Circuit Failed High | ||
| 18 | 354 | 4 | Relative Humidity Sensor Circuit Failed Low | ||
| 18 | 51 | 4 | Throttle Plate Input Voltage Low | ||
| 21 | 91 | 3 | Throttle Position Sensor (TPS) Circuit High | ||
| 22 | 91 | 4 | Throttle Position Sensor (TPS) Circuit Low | ||
| 23 | 174 | 3 | Fuel Temperature Circuit High | ||
| 24 | 174 | 4 | Fuel Temperature Circuit Low | ||
| 25 | DDEC System – No Active or Inactive Codes | ||||
| 26 | 11 | 25 | Auxiliary Shutdown No. 1 Active | ||
| 26 | 61 | 11 | Auxiliary Shutdown No. 2 Active | ||
| 27 | 172 | 3 | Air Temperature Circuit High | ||
| 28 | 172 | 4 | Air Temperature Circuit Low | ||
| 29 | 404 | 4 | Turbo Compressor Outlet (TCO) Low Voltage | ||
| 29 | 351 | 4 | Turbo Compressor Inlet (TCI) Low Voltage | ||
| 31 | 4 | 52 | EGR Solenoid Power Open or Short to Ground | ||
| 31 | 3 | 51 | PWM Valve Power Open or Short to Ground | ||
| 31 | 3 | 52 | EGR Solenoid Power Open or Short to Ground | ||
| 31 | 4 | 51 | PWM Valve Power Open or Short to Ground | ||
| 32 | 3 | 239 | CEL Short to Battery | ||
| 32 | 4 | 239 | CEL Open Circuit | ||
| 32 | 4 | 238 | SEL Open Circuit | ||
| 32 | 3 | 238 | SEL Short to Battery | ||
| 33 | 102 | 3 | Turbo Boost Sensor (TBS) Circuit High | ||
| 34 | 102 | 4 | Turbo Boost Sensor (TBS) Circuit Low | ||
| 35 | 100 | 3 | Oil Pressure Circuit High | ||
| 36 | 100 | 4 | Oil Pressure Circuit Low | ||
| 37 | 95 | 3 | Fuel Restriction Input Voltage High | ||
| 37 | 94 | 3 | Fuel Pressure Input Voltage High | ||
| 38 | 95 | 4 | Fuel Pressure Restriction (FRS) Input Voltage Low | ||
| 38 | 94 | 4 | Fuel Pressure Sensor (FPS) Input Voltage Low | ||
| 39 | 7 | 152 | EGR Valve Not Responding (Temporary Code) | ||
| 39 | 2 | 147 | VNT Vanes Not Responding – Boost Power | ||
| 39 | 7 | 153 | VNT Vanes Not Responding (Temporary Code) | ||
| 39 | 7 | 147 | VNT Vanes Not Responding – EGR | ||
| 39 | 12 | 146 | EGR Leak – Boost Jake | ||
| 39 | 11 | 147 | VNT Vanes at Max – Jake | ||
| 39 | 2 | 146 | EGR Leak – Boost Power | ||
| 39 | 14 | 147 | EGR Flow Too Low | ||
| 39 | 7 | 146 | EGR Valve Not Responding | ||
| 39 | 12 | 147 | VNT Vanes Not Responding – Boost Jake | ||
| 41 | 21 | Too Many Synchronous Reference Sensor (SRS) Pulses | |||
| 42 | 21 | 1 | Too Few Synchronous Reference Sensor (SRS) Pulses | ||
| 43 | 111 | 1 | Coolant Level Low | ||
| 44 | 175 | Oil Temperature High | |||
| 44 | 110 | Coolant Temperature High | |||
| 45 | 100 | 1 | Oil Pressure Low | ||
| 46 | 168 | 1 | Battery Supply Voltage Below Recommended Operating Range | ||
| 47 | 102 | Turbo Boost Pressure High (Diesel Fueled Engines) | |||
| 47 | 106 | Air Inlet Pressure High (Gas Fueled Engines) | |||
| 47 | 94 | Fuel Pressure High | |||
| 48 | 404 | 1 | TCO Temperature Below Range | ||
| 48 | 154 | 1 | EGR Temperature Low (32.xx ECM Software and Lower) | ||
| 48 | 155 | 1 | EGR Delta Pressure Low (32.xx ECM Software and Lower) | ||
| 48 | 411 | 1 | EGR Delta Pressure Low (35.00 ECM Software and Higher) | ||
| 48 | 94 | 1 | Fuel Pressure Low | ||
| 48 | 351 | 1 | TCI Temperature Below Range | ||
| 48 | 412 | 1 | EGR Temperature Low (35.00 ECM Software and Higher) | ||
| 48 | 106 | 1 | Air Inlet Pressure Low (Gas Fueled Engines) | ||
| 49 | 404 | 14 | TCO De-Rate | ||
| 49 | 351 | TCI Temperature Above Range | |||
| 49 | 404 | TCO Temperature Above Range | |||
| 51 | 351 | 3 | TCI Temperature Failed High | ||
| 51 | 404 | 3 | TCO Temperature Failed High | ||
| 52 | 12 | 254 | Analog to Digital (A/D) Converter Device – Malfunctioned | ||
| 53 | 12 | 253 | EEPROM Write Fail | ||
| 53 | 2 | 253 | Non-Volatile Checksum Incorrect | ||
| 54 | 84 | 12 | VSS Fault | ||
| 55 | 84 | 12 | J1939 Data Link Fault | ||
| 55 | 86 | 14 | J1939 Data Link Fault | ||
| 55 | 14 | 216 | Missing Other ECU | ||
| 55 | 12 | 231 | ECM Fault | ||
| 56 | 12 | 250 | J1587 Data Link Fault | ||
| 57 | 12 | 249 | J1922 Data Link Fault | ||
| 58 | 92 | Torque Overload | |||
| 61 | 2 | Injector 2 Response Long | |||
| 61 | 1 | Injector 1 Response Long | |||
| 61 | 5 | Injector 5 Response Long | |||
| 61 | 3 | Injector 3 Response Long | |||
| 61 | 6 | Injector 6 Response Long | |||
| 61 | 4 | Injector 4 Response Long | |||
| 62 | 4 | 56 | Auxiliary Output No. 8 – Open Circuit | ||
| 62 | 3 | 26 | Auxiliary Output No. 1 – Short to Battery | ||
| 62 | 3 | 55 | Auxiliary Output No. 7 – Short to Battery | ||
| 62 | 3 | 54 | Auxiliary Output No. 6 – Short to Battery | ||
| 62 | 3 | 40 | Auxiliary Output No. 2 – Short to Battery | ||
| 62 | 3 | 56 | Auxiliary Output No. 8 – Short to Battery | ||
| 62 | 4 | 54 | Auxiliary Output No. 6 – Open Circuit | ||
| 62 | 4 | 40 | Auxiliary Output No. 2 – Open Circuit | ||
| 62 | 4 | 26 | Auxiliary Output No. 1 – Open Circuit | ||
| 62 | 4 | 53 | Auxiliary Output No. 5 – Open Circuit | ||
| 62 | 4 | 55 | Auxiliary Output No. 7 – Open Circuit | ||
| 62 | 4 | 54 | Auxiliary Output No. 6 – Open Circuit | ||
| 63 | 3 | 60 | PWM No. 4 – Short to Battery | ||
| 63 | 4 | 60 | PWM No. 4 – Open Circuit | ||
| 63 | 4 | 58 | PWM No. 2 – Open Circuit | ||
| 63 | 3 | 59 | PWM No. 3 – Short to Battery | ||
| 63 | 3 | 57 | PWM No. 1 – Short to Battery | ||
| 63 | 4 | 59 | PWM No. 3 – Open Circuit | ||
| 63 | 4 | 57 | PWM No. 1 – Open Circuit | ||
| 63 | 3 | 58 | PWM No. 2 – Short to Battery | ||
| 64 | 103 | 8 | Turbo Speed Sensor Input Failure | ||
| 64 | 103 | Turbo Overspeed | |||
| 65 | 107 | 4 | Air Filter Sensor Voltage Low (Diesel Engines) | ||
| 65 | 107 | 3 | Air Filter Sensor Voltage High (Diesel Engines) | ||
| 65 | 51 | 7 | Throttle Plate Not Responding | ||
| 65 | 51 | Throttle Plate Above Normal Range (Gas Engines) | |||
| 65 | 51 | 1 | Throttle Plate Below Normal Range (Gas Engines) | ||
| 66 | 4 | 76 | Knock Sensor Input Voltage Low (Gas Engines) | ||
| 66 | 99 | 4 | Oil Filter Sensor Input Voltage Low (Diesel Engines) | ||
| 66 | 76 | Knock Level Above Normal Range (Gas Engines) | |||
| 66 | 3 | 76 | Knock Sensor Input Voltage High (Gas Engines) | ||
| 66 | 99 | 3 | Oil Filter Sensor Input Voltage High (Diesel Engines) | ||
| 66 | 7 | 76 | Knock Level Torque Reduction (Gas Engines) | ||
| 67 | 109 | 3 | Coolant Pressure Sensor Input Voltage High (Diesel Engines) | ||
| 67 | 106 | 3 | Air Inlet Pressure Sensor Input Voltage High (Gas Engines) | ||
| 67 | 106 | 4 | Air Inlet Pressure Sensor Input Voltage Low (Gas Engines) | ||
| 67 | 109 | 4 | Coolant Pressure Sensor Input Voltage Low (Diesel Engines) | ||
| 68 | 5 | 230 | Idle Validation Switch (IVS) – Open Circuit | ||
| 68 | 6 | 230 | Idle Validation Switch (IVS) – Short to Ground | ||
| 71 | 1 | 1 | Injector No. 1 – Short Response Time | ||
| 71 | 1 | 2 | Injector No. 2 – Short Response Time | ||
| 71 | 1 | 3 | Injector No. 3 – Short Response Time | ||
| 71 | 1 | 5 | Injector No. 5 – Short Response Time | ||
| 71 | 1 | 4 | Injector No. 4 – Short Response Time | ||
| 71 | 1 | 6 | Injector No. 6 – Short Response Time | ||
| 72 | 84 | Overspeed with Fuel Limit Has Been Exceeded | |||
| 72 | 84 | 11 | Overspeed without Fuel Limit Has Been Exceeded | ||
| 73 | 107 | Air Filter Restriction High (Diesel Engines) | |||
| 73 | 11 | 226 | Neutral / In-Gear Switch Fault (Diesel Engines) | ||
| 73 | 4 | 77 | Gas Valve Position – Input Voltage Low (Gas Engines) | ||
| 73 | 3 | 227 | Shift Knob Voltage Above Normal or Shorted High (Diesel Engines) | ||
| 73 | 4 | 227 | Shift Knob Voltage Below Normal or Shorted Low (Diesel Engines) | ||
| 73 | 14 | 151 | Stuck In Gear Detected (Diesel Engines) | ||
| 73 | 1 | 77 | Gas Valve Position – Below Normal Range (Gas Engines) | ||
| 73 | 3 | 77 | Gas Valve Position – Input voltage High (Gas Engines) | ||
| 73 | 2 | 227 | Shift Knob Erratic, Intermittent or Incorrect (Diesel Engines) | ||
| 73 | 77 | Gas Valve Position – Above Normal Range (Gas Engines) | |||
| 74 | 70 | 4 | Optimized Idle Safety Loop | ||
| 75 | 168 | Battery Voltage High | |||
| 76 | 121 | Engine Overspeed with Engine Brake | |||
| 77 | 252 | 13 | Clock Module Failure | ||
| 77 | 252 | 10 | Clock Module Abnormal Rate of Change | ||
| 77 | 174 | 1 | TCO Temperature Below Range (Temporary Code) | ||
| 77 | 174 | TCO Temperature Above Range (Temporary Code) | |||
| 77 | 354 | Relative Humidity Above Range | |||
| 77 | 73 | 1 | Fire Pump Pressure Below Range | ||
| 77 | 354 | 1 | Relative Humidity Below Range | ||
| 77 | 174 | 1 | Fuel Temperature Below Range | ||
| 77 | 81 | 1 | Exhaust Back Pressure Below Range | ||
| 77 | 111 | Coolant Level Above Range | |||
| 77 | 251 | 13 | Clock Module Failure | ||
| 77 | 171 | Ambient Air Temperature Above Range | |||
| 77 | 108 | Barometric Pressure Above Range | |||
| 77 | 109 | Coolant Pressure Above Range | |||
| 77 | 81 | Exhaust Back Pressure Above Range | |||
| 77 | 81 | 3 | Exhaust Back Pressure Failed High | ||
| 77 | 81 | 4 | Exhaust Back Pressure Failed Low | ||
| 77 | 81 | 12 | Exhaust Back Pressure at Ramp Down Threshold | ||
| 77 | 95 | 1 | Fuel Filter Differential Pressure Below Range | ||
| 77 | 99 | 1 | Oil Filter Differential Below Range | ||
| 77 | 100 | Engine Oil Pressure Above Range | |||
| 77 | 102 | 1 | Turbo Boost Pressure Below Range | ||
| 77 | 105 | 1 | Inlet Manifold Temperature Below Range | ||
| 77 | 172 | 1 | Air Inlet Temperature Below Range | ||
| 77 | 171 | 1 | Ambient Air Temperature Below Range | ||
| 77 | 110 | 1 | Coolant Temperature Below Range | ||
| 77 | 251 | 10 | Clock Module Abnormal Rate of Change | ||
| 77 | 222 | 14 | Anti-Theft Fault Present | ||
| 77 | 175 | 1 | Engine Oil Temperature Below Range | ||
| 77 | 174 | Fuel Temperature Above Range | |||
| 77 | 108 | 1 | Barometric Pressure Below Range | ||
| 77 | 107 | 1 | Air Filter Differential Pressure Below Range | ||
| 78 | 86 | 14 | Cruise Control / Adaptive Cruise Control (aka Smart Cruise) | ||
| 81 | 98 | 3 | Oil Level Sensor Input Voltage High | ||
| 81 | 411 | 3 | EGR Delta P Circuit Failed High | ||
| 81 | 155 | 3 | EGR Delta P Circuit Failed High | ||
| 81 | 154 | 3 | EGR Temperature Circuit Failed High | ||
| 81 | 173 | 3 | Exhaust Gas Temperature Circuit Failed High | ||
| 81 | 412 | 3 | EGR Temperature Circuit Failed High | ||
| 82 | 4 | 155 | EGR Delta Pressure Failed Low | ||
| 82 | 4 | 412 | EGR Temperature Failed Low | ||
| 82 | 4 | 154 | EGR Temperature Failed Low | ||
| 82 | 98 | 4 | Oil Level Sensor Input Voltage Low | ||
| 82 | 4 | 411 | EGR Delta Pressure Failed Low | ||
| 82 | 173 | 4 | Exhaust Gas Temperature Circuit Failed Low | ||
| 83 | 154 | EGR Temperature High | |||
| 83 | 155 | EGR Delta Pressure High | |||
| 83 | 73 | External Pump Pressure High | |||
| 83 | 412 | EGR Temperature High | |||
| 83 | 173 | Exhaust Temperature High | |||
| 83 | 411 | EGR Delta Pressure High | |||
| 84 | 98 | 1 | Oil Level Low | ||
| 85 | 190 | Engine Overspeed | |||
| 86 | 73 | 3 | PGS Sensor High | ||
| 87 | 73 | 4 | PGS Sensor Low | ||
| 88 | Coolant Pressure Low | ||||
| 89 | 111 | 12 | ACLS Fault | ||
| 89 | 95 | Fuel Inlet Restriction High | |||
| 90 | 168 | 1 | Engine Sensor Harness | ||
| 91 | 168 | 1 | Vehicle Harness |
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