Computer codes

Computer Fault Codes

Keep in mind that these codes are only known to be accurate with 2nd gen trucks. For 3rd gen and 3rd gen (2007 and up), please submit your information to us.

• P0016 Crankshaft/Camshaft Timing Misalignment/Out-of-Sync
• P0071 Ambient Temperature Sensor Performance / Rationality
• P0072 Ambient Temperature Sensor Low
• P0073 Ambient Temperature Sensor High
• P0088 Fuel Rail Pressure Too High
• P0106 Manifold Absolute Pressure Sensor Performance / Rationality
• P0107 Manifold Absolute Pressure Sensor Low
• P0108 Manifold Absolute Pressure Sensor High
• P0111 Intake Air / Charge Temperature Sensor Performance / Rationality
• P0112 Intake Air / Charge Temperature Sensor Low
• P0113 Intake Air / Charge Temperature Sensor High
• P0116 Engine Coolant Temperature Sensor Performance / Rationality
• P0117 Engine Coolant Temperature Sensor Low
• P0118 Engine Coolant Temperature Sensor High
• P0128 Cooling System Error / Thermostat Rationality
• P0148 Fuel Delivery Error
• P0169 Water-in-Fuel Detected For Too Long
• P0192 Fuel Rail Pressure Sensor Low
• P0193 Fuel Rail Pressure Sensor High
• P0201 Fuel Injector 1 Circuit
• P0202 Fuel Injector 2 Circuit
• P0203 Fuel Injector 3 Circuit
• P0204 Fuel Injector 4 Circuit
• P0205 Fuel Injector 5 Circuit
• P0206 Fuel Injector 6 Circuit
• P0217 Coolant Temperature Too High
• P0219 Engine Overspeed
• P0234 Turbocharger Overboost Condition
• P0236 Turbocharger Boost Pressure Sensor Performance / Rationality
• P0237 Turbocharger Boost Pressure Sensor Low
• P0238 Turbocharger Boost Pressure Sensor High
• P0251 Injection Pump Fuel Valve Feedback
• P0300 Multiple Cylinder Misfire
• P0301 Cylinder 1 Misfire
• P0302 Cylinder 2 Misfire
• P0303 Cylinder 3 Misfire
• P0304 Cylinder 4 Misfire
• P0305 Cylinder 5 Misfire
• P0306 Cylinder 6 Misfire
• P0335 Crankshaft Position Sensor Circuit
• P0336 Crankshaft Position Sensor Performance
• P0337 Crankshaft Position Sensor Circuit Low
• P0338 Crankshaft Position Sensor Circuit High
• P0340 Camshaft Position Sensor Circuit
• P0341 Camshaft Position Sensor Performance / Rationality
• P0381 Wait-to-Start Lamp Inoperative
• P0461 Fuel Level Sensor 1 Performance / Rationality
• P0462 Fuel Level Sensor 1 Low
• P0463 Fuel Level Sensor 1 High
• P0477 Exhaust Pressure Control Relay Low
• P0478 Exhaust Pressure Control Relay High
• P0480 Cooling Fan 1 Control Circuit/Open (Low Speed Fan Relay)
• P0483 Cooling Fan Speed
• P0500 Vehicle Speed Sensor 1 Circuit, or No Vehicle Speed Reference Signal 1
• P0514 Battery Temperature Sensor Performance / Rationality
• P0516 Battery Temperature Sensor Low
• P0517 Battery Temperature Sensor High
• P0521 Oil Pressure Sensor Performance / Rationality
• P0524 Oil Pressure Too Low
• P0532 A/C Pressure Sensor Low
• P0533 A/C Pressure Sensor High
• P0541 Intake Air Heater Relay 1 Low
• P0542 Intake Air Heater Relay 1 High
• P0562 Battery Voltage Low
• P0563 Battery Voltage High
• P0572 Brake Switch 1 Low
• P0573 Brake Switch 1 High
• P0580 Speed Control Multiplexed Switch 1 Low
• P0581 Speed Control Multiplexed Switch 1 High
• P0602 Control Module Programming Error/NotProgrammed
• P0604 Internal Control Module RAM Integrity Failure
• P0606 Internal ECM Processor
• P0607 ECU Internal Performance
• P0622 Generator Field Control Circuit
• P0628 Fuel Pump Relay Circuit Low, or Fuel Lift Pump Control Circuit Low
• P0629 Fuel Pump Relay Circuit High, or Fuel Lift Pump Control Circuit High
• P0630 VIN Not Programmed in PCM
• P0633 SKIM Key Not Programmed in PCM
• P0642 Sensor Reference Voltage 1 Circuit Low
• P0643 Sensor Reference Voltage 1 Circuit High
• P0646 A/C Clutch Relay Circuit Low
• P0647 A/C Clutch Relay Circuit High
• P0652 Sensor Reference Voltage 2 Circuit Low
• P0653 Sensor Reference Voltage 2 Circuit High
• P0698 Sensor Reference Voltage 3 Circuit Low
• P0699 Sensor Reference Voltage 3 Circuit High
• P0700 Transmission Control System (MIL Request)
• P0837 Four Wheel Drive (4WD) Switch Performance / Rationality
• P0838 Four Wheel Drive (4WD) Switch Circuit Low
• P0839 Four Wheel Drive (4WD) Switch Circuit High
• P1652 J1850 Communication Bus
• P2121 Pedal Position Sensor 1 Performance / Rationality
• P2122 Pedal Position Sensor 1 Low
• P2123 Pedal Position Sensor 1 High
• P2127 Pedal Validation Switch 2 Low
• P2128 Pedal Validation Switch 2 High
• P2146 Fuel Injector Group 1 Supply Voltage Circuit
• P2149 Fuel Injector Group 2 Supply Voltage Circuit
• P2266 Water in Fuel Sensor Circuit Low
• P2269 Water in Fuel Condition
• P2502 Charging System Output Voltage
• P2503 Charging System Output Low
• P2504 Charging System Output High
• P2509 ECM/PCM Power Input Signal Intermittent
• P2607 Intake Air Heater Relay 2 Low
• P2608 Intake Air Heater Relay 2 High
• P2609 Intake Air Heater System Performance