Fuel System Codes
5,039 OBD-II diagnostic trouble codes in this category.
Showing page 9 of 51 (5,039 codes total)
| Code | Description | Subsystem | Severity |
|---|---|---|---|
| P05EB | Cold Start SCR NOx Catalyst Inlet Temperature Too Low | Fuel Metering | Medium |
| P05ED | Reductant Heater Control Module Supply Voltage | Fuel Metering | Medium |
| P05EE | Reductant Pump Supply Voltage Circuit/Open | Fuel Metering | Medium |
| P05EF | Reductant Pump Supply Voltage Circuit Low | Fuel Metering | Medium |
| P05F0 | Reductant Pump Supply Voltage Circuit High | Fuel Metering | Medium |
| P05F1 | Reductant Pump Supply Voltage Circuit Stuck On | Fuel Metering | Medium |
| P05F2 | Reductant Pump Supply Voltage Circuit Stuck Off | Fuel Metering | Medium |
| P05F3 | Exhaust Aftertreatment Power Relay Control Circuit/Open | Fuel Metering | Medium |
| P05F4 | Exhaust Aftertreatment Power Relay Control Circuit Low | Fuel Metering | Medium |
| P05F5 | Exhaust Aftertreatment Power Relay Control Circuit High | Fuel Metering | Medium |
| P05F6 | Exhaust Aftertreatment Power Relay Control Circuit Stuck On | Fuel Metering | Medium |
| P05F7 | Exhaust Aftertreatment Power Relay Control Circuit Stuck Off | Fuel Metering | Medium |
| P05F8 | Reductant Heater Control Module Performance | Fuel Metering | Medium |
| P05F9 | Stop-Start Status Signal Circuit | Fuel Metering | Medium |
| P05FA | Stop-Start Status Signal Circuit Low | Fuel Metering | Medium |
| P05FB | Stop-Start Status Signal Circuit High | Fuel Metering | Medium |
| P05FC | Cold Start Fuel Pressure Performance Bank 2 | Fuel Metering | Medium |
| P05FE | Active Grille Air Shutter C Performance/Stuck Off | Fuel Metering | Medium |
| P05FF | Brake Pressure Sensor / Brake Pedal Position Sensor Correlation | Fuel Metering | Medium |
| P060A | Internal Control Module Monitoring Processor Performance | Fuel Metering | Medium |
| P060B | Internal Control Module A/D Processing Performance | Fuel Metering | Medium |
| P060C | Internal Control Module Main Processor Performance | Fuel Metering | Medium |
| P060D | Internal Control Module Accelerator Pedal Position Performance | Fuel Metering | Medium |
| P060E | Internal Control Module Throttle Position Performance | Fuel Metering | Medium |
| P060F | Internal Control Module Coolant Temperature Performance | Fuel Metering | Medium |
| P061A | Internal Control Module Torque Performance | Fuel Metering | Medium |
| P061B | Internal Control Module Torque Calculation Performance | Fuel Metering | Medium |
| P061C | Internal Control Module Engine RPM Performance | Fuel Metering | Medium |
| P061D | Internal Control Module Engine Air Mass Performance | Fuel Metering | Medium |
| P061E | Internal Control Module Brake Signal Performance | Fuel Metering | Medium |
| P061F | Internal Control Module Throttle Actuator Controller Performance | Fuel Metering | Medium |
| P0628 | Fuel Pump A Control Circuit Low | Fuel Pump | High |
| P0629 | Fuel Pump A Control Circuit High | Fuel Pump | Critical |
| P062A | Fuel Pump A Control Circuit Range/Performance | Fuel Metering | Medium |
| P062B | Internal Control Module Fuel Injector Control Performance | Fuel Metering | Medium |
| P062C | Internal Control Module Vehicle Speed Performance | Fuel Metering | Medium |
| P062D | Fuel Injector Driver Circuit Performance Bank 1 | Fuel Metering | Medium |
| P062E | Fuel Injector Driver Circuit Performance Bank 2 | Fuel Metering | Medium |
| P062F | Internal Control Module EEPROM Error | Fuel Metering | Medium |
| P063A | Generator Voltage Sense Circuit A | Fuel Metering | Medium |
| P063B | Generator Voltage Sense Circuit A Range/Performance | Fuel Metering | Medium |
| P063C | Generator Voltage Sense Circuit A Low | Fuel Metering | Medium |
| P063D | Generator Voltage Sense Circuit A High | Fuel Metering | Medium |
| P063E | Auto Configuration Throttle Input Not Present Bank 1 | Fuel Metering | Medium |
| P063F | Auto Configuration Engine Coolant Temperature Input Not Present | Fuel Metering | Medium |
| P064A | Fuel Pump Control Module A | Fuel Metering | Medium |
| P064B | PTO Control Module | Fuel Metering | Medium |
| P064C | Glow Plug Control Module 1 | Fuel Metering | Medium |
| P064F | Unauthorized Software/Calibration Detected | Fuel Metering | Medium |
| P065A | Generator System Performance | Fuel Metering | Medium |
| P065B | Generator A Control Circuit Range/Performance | Fuel Metering | Medium |
| P065C | Generator A Mechanical Performance | Fuel Metering | Medium |
| P065D | Reductant System Malfunction Lamp Control Circuit | Fuel Metering | Medium |
| P065E | Intake Manifold Tuning Valve Performance Bank 1 | Fuel Metering | Medium |
| P065F | Intake Manifold Tuning Valve Performance Bank 2 | Fuel Metering | Medium |
| P066A | Cylinder 1 Glow Plug Control Circuit Low | Fuel Metering | Medium |
| P066B | Cylinder 1 Glow Plug Control Circuit High | Fuel Metering | Medium |
| P066C | Cylinder 2 Glow Plug Control Circuit Low | Fuel Metering | Medium |
| P066D | Cylinder 2 Glow Plug Control Circuit High | Fuel Metering | Medium |
| P066E | Cylinder 3 Glow Plug Control Circuit Low | Fuel Metering | Medium |
| P066F | Cylinder 3 Glow Plug Control Circuit High | Fuel Metering | Medium |
| P067A | Cylinder 4 Glow Plug Control Circuit Low | Fuel Metering | Medium |
| P067B | Cylinder 4 Glow Plug Control Circuit High | Fuel Metering | Medium |
| P067C | Cylinder 5 Glow Plug Control Circuit Low | Fuel Metering | Medium |
| P067D | Cylinder 5 Glow Plug Control Circuit High | Fuel Metering | Medium |
| P067E | Cylinder 6 Glow Plug Control Circuit Low | Fuel Metering | Medium |
| P067F | Cylinder 6 Glow Plug Control Circuit High | Fuel Metering | Medium |
| P068A | ECM/PCM Power Relay De-Energized Performance - Too Early | Fuel Metering | Medium |
| P068B | ECM/PCM Power Relay De-Energized Performance - Too Late | Fuel Metering | Medium |
| P068C | Cylinder 7 Glow Plug Control Circuit Low | Fuel Metering | Medium |
| P068D | Cylinder 7 Glow Plug Control Circuit High | Fuel Metering | Medium |
| P068E | Cylinder 8 Glow Plug Control Circuit Low | Fuel Metering | Medium |
| P068F | Cylinder 8 Glow Plug Control Circuit High | Fuel Metering | Medium |
| P069A | Cylinder 9 Glow Plug Control Circuit Low | Fuel Metering | Medium |
| P069B | Cylinder 9 Glow Plug Control Circuit High | Fuel Metering | Medium |
| P069C | Cylinder 10 Glow Plug Control Circuit Low | Fuel Metering | Medium |
| P069D | Cylinder 10 Glow Plug Control Circuit High | Fuel Metering | Medium |
| P069E | Fuel Pump Control Module Requested MIL Illumination | Fuel Metering | Medium |
| P069F | Throttle Actuator Control Lamp Control Circuit | Fuel Metering | Medium |
| P06A0 | Variable A/C Compressor Control Circuit | Fuel Metering | Medium |
| P06A1 | Variable A/C Compressor Control Circuit Low | Fuel Metering | Medium |
| P06A2 | Variable A/C Compressor Control Circuit High | Fuel Metering | Medium |
| P06A3 | Sensor Reference Voltage D Circuit/Open | Fuel Metering | Medium |
| P06A4 | Sensor Reference Voltage D Circuit Low | Fuel Metering | Medium |
| P06A5 | Sensor Reference Voltage D Circuit High | Fuel Metering | Medium |
| P06A6 | Sensor Reference Voltage A Circuit Range/Performance | Fuel Metering | Medium |
| P06A7 | Sensor Reference Voltage B Circuit Range/Performance | Fuel Metering | Medium |
| P06A8 | Sensor Reference Voltage C Circuit Range/Performance | Fuel Metering | Medium |
| P06A9 | Sensor Reference Voltage D Circuit Range/Performance | Fuel Metering | Medium |
| P06AA | Control Module Internal Temperature B Too High | Fuel Metering | Medium |
| P06AB | Control Module Internal Temperature Sensor B Circuit | Fuel Metering | Medium |
| P06AC | Control Module Internal Temperature Sensor B Range/Performance | Fuel Metering | Medium |
| P06AD | Control Module Internal Temperature Sensor B Circuit Low | Fuel Metering | Medium |
| P06AE | Control Module Internal Temperature Sensor B Circuit High | Fuel Metering | Medium |
| P06AF | Torque Management System - Forced Engine Shutdown | Fuel Metering | Medium |
| P06B0 | Sensor Power Supply A Circuit/Open | Fuel Metering | Medium |
| P06B1 | Sensor Power Supply A Circuit Low | Fuel Metering | Medium |
| P06B2 | Sensor Power Supply A Circuit High | Fuel Metering | Medium |
| P06B3 | Sensor Power Supply B Circuit/Open | Fuel Metering | Medium |
| P06B4 | Sensor Power Supply B Circuit Low | Fuel Metering | Medium |
About Fuel System Codes
This page lists all 5,039 OBD-II diagnostic trouble codes classified under the Fuel System category. These codes are stored by your vehicle's onboard computer when a sensor detects a malfunction in the fuel system system. Each code begins with a letter indicating the system (P for Powertrain, B for Body, C for Chassis, U for Network) followed by four digits that identify the specific fault.
When your check engine light comes on, an OBD-II scanner reads these stored codes to help pinpoint the problem. Generic codes (where the second digit is 0) follow the SAE J2012 standard and mean the same thing on every vehicle. Manufacturer-specific codes (where the second digit is 1) may have different meanings depending on the vehicle brand.
Click any code in the table above to see its full description, possible causes, common symptoms, and step-by-step repair guidance. Use the search box to quickly find a specific code within this category.