Fuel System Codes
5,039 OBD-II diagnostic trouble codes in this category.
Showing page 48 of 51 (5,039 codes total)
| Code | Description | Subsystem | Severity |
|---|---|---|---|
| P2CE1 | Intake Air Heater C Circuit/Open | Fuel Metering | Medium |
| P2CE2 | Intake Air Heater C Circuit Range/Performance | Fuel Metering | Medium |
| P2CE3 | Intake Air Heater C Circuit Low | Fuel Metering | Medium |
| P2CE4 | Intake Air Heater C Circuit High | Fuel Metering | Medium |
| P2CE5 | Particulate Filter Pressure Sensor C Circuit | Fuel Metering | Medium |
| P2CE6 | Particulate Filter Pressure Sensor C Circuit Range/Performance | Fuel Metering | Medium |
| P2CE7 | Particulate Filter Pressure Sensor C Circuit Low | Fuel Metering | Medium |
| P2CE8 | Particulate Filter Pressure Sensor C Circuit High | Fuel Metering | Medium |
| P2CE9 | Particulate Filter Pressure Sensor C Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P2CEA | Particulate Filter Pressure Sensor D Circuit | Fuel Metering | Medium |
| P2CEB | Particulate Filter Pressure Sensor D Circuit Range/Performance | Fuel Metering | Medium |
| P2CEC | Particulate Filter Pressure Sensor D Circuit Low | Fuel Metering | Medium |
| P2CED | Particulate Filter Pressure Sensor D Circuit High | Fuel Metering | Medium |
| P2CEE | Particulate Filter Pressure Sensor D Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P2CEF | Auxiliary Thermostat A Stuck Open | Fuel Metering | Medium |
| P2CF0 | Auxiliary Thermostat A Stuck Closed | Fuel Metering | Medium |
| P2CF1 | Auxiliary Thermostat B Stuck Open | Fuel Metering | Medium |
| P2CF2 | Auxiliary Thermostat B Stuck Closed | Fuel Metering | Medium |
| P2CF3 | Hybrid/EV Battery Pack Coolant Pump A Underspeed | Fuel Metering | Medium |
| P2CF4 | Hybrid/EV Battery Pack Coolant Pump B Supply Voltage Circuit | Fuel Metering | Medium |
| P2CF5 | Hybrid/EV Battery Pack Coolant Pump B Stuck/Stalled | Fuel Metering | Medium |
| P2CF6 | Hybrid/EV Battery Pack Coolant Pump B Overspeed /Air in System | Fuel Metering | Medium |
| P2CF7 | Hybrid/EV Battery Pack Coolant Pump B Underspeed | Fuel Metering | Medium |
| P2CF8 | Engine Coolant Bypass Valve D Control Circuit Driver Current/Temperature Too High | Fuel Metering | Medium |
| P2CF9 | Belt Integrated Starter Generator Belt Tensioner Control Circuit/Open | Fuel Metering | Medium |
| P2CFA | Belt Integrated Starter Generator Belt Tensioner Control Circuit Low | Fuel Metering | Medium |
| P2CFB | Belt Integrated Starter Generator Belt Tensioner Control Circuit High | Fuel Metering | Medium |
| P2CFC | A/C Clutch Control Circuit | Fuel Metering | Medium |
| P2CFD | A/C Clutch Control Circuit Low | Fuel Metering | Medium |
| P2CFE | A/C Clutch Control Circuit High | Fuel Metering | Medium |
| P2CFF | A/C Clutch Control Circuit Driver Current/Temperature Too High | Fuel Metering | Medium |
| P2D00 | Motor Electronics Coolant Pump A Stuck/Stalled | Fuel Metering | Medium |
| P2D01 | Motor Electronics Coolant Pump A Overspeed/Air in System | Fuel Metering | Medium |
| P2D02 | Motor Electronics Coolant Pump A Underspeed | Fuel Metering | Medium |
| P2D03 | Motor Electronics Coolant Pump A Supply Voltage Circuit | Fuel Metering | Medium |
| P2D04 | Motor Electronics Coolant Pump A Control Module Overtemperature | Fuel Metering | Medium |
| P2D05 | Motor Electronics Coolant Pump B Stuck/Stalled | Fuel Metering | Medium |
| P2D06 | Motor Electronics Coolant Pump B Overspeed/Air in System | Fuel Metering | Medium |
| P2D07 | Motor Electronics Coolant Pump B Underspeed | Fuel Metering | Medium |
| P2D08 | Motor Electronics Coolant Pump B Supply Voltage Circuit | Fuel Metering | Medium |
| P2D09 | Motor Electronics Coolant Pump B Control Module Overtemperature | Fuel Metering | Medium |
| P2D0A | Motor Electronics Coolant Pump C Stuck/Stalled | Fuel Metering | Medium |
| P2D0B | Motor Electronics Coolant Pump C Overspeed/Air in System | Fuel Metering | Medium |
| P2D0C | Motor Electronics Coolant Pump C Underspeed | Fuel Metering | Medium |
| P2D0D | Motor Electronics Coolant Pump C Supply Voltage Circuit | Fuel Metering | Medium |
| P2D0E | Motor Electronics Coolant Pump C Control Module Overtemperature | Fuel Metering | Medium |
| P2D11 | Exhaust Flow Control Valve A Position Not Learned | Fuel Metering | Medium |
| P2D12 | Exhaust Flow Control Valve B Position Not Learned | Fuel Metering | Medium |
| P2D13 | Exhaust Flow Control Valve C Control Circuit/Open | Fuel Metering | Medium |
| P2D14 | Exhaust Flow Control Valve C Control Circuit Low | Fuel Metering | Medium |
| P2D15 | Exhaust Flow Control Valve C Control Circuit High | Fuel Metering | Medium |
| P2D16 | Exhaust Flow Control Valve C Control Performance | Fuel Metering | Medium |
| P2D17 | Exhaust Flow Control Valve C Position Circuit | Fuel Metering | Medium |
| P2D18 | Exhaust Flow Control Valve C Position Circuit Range/Performance | Fuel Metering | Medium |
| P2D19 | Exhaust Flow Control Valve C Position Circuit Low | Fuel Metering | Medium |
| P2D1A | Exhaust Flow Control Valve C Position Circuit High | Fuel Metering | Medium |
| P2D1B | Exhaust Flow Control Valve C Position Not Learned | Fuel Metering | Medium |
| P2D1C | Cold Start EGR A/B Ratio Performance | Fuel Metering | Medium |
| P2D1D | Reductant System Leak Detected – Small Leak | Fuel Metering | Medium |
| P2D1E | Reductant System Leak Detected – Large Leak | Fuel Metering | Medium |
| P2D1F | Reductant System Flow – Restricted | Fuel Metering | Medium |
| P2D20 | Reductant System Flow – Blocked | Fuel Metering | Medium |
| P2D26 | Coolant Pump E Control Circuit Performance/Stuck Off | Fuel Metering | Medium |
| P2D27 | Coolant Pump F Control Circuit Performance/Stuck Off | Fuel Metering | Medium |
| P2D28 | Cold Start Propulsion Torque Performance | Fuel Metering | Medium |
| P2D29 | A/C Compressor Motor Stalled | Fuel Metering | Medium |
| P2D2A | Hybrid/EV Electronics Coolant Temperature Sensor A/B Correlation | Fuel Metering | Medium |
| P2D2B | Hybrid/EV Battery Pack Coolant Temperature Sensor A/B Correlation | Fuel Metering | Medium |
| P2D2C | Engine Coolant Temperature Measurement System - Multiple Sensor Correlation | Fuel Metering | Medium |
| P2D2D | Cold Start Intake Manifold Runner Performance Bank 1 | Fuel Metering | Medium |
| P2D2E | Cold Start Intake Manifold Runner Performance Bank 2 | Fuel Metering | Medium |
| P2D31 | Intake Manifold Tuning Valve Exceeded Learning Limit Bank 1 | Fuel Metering | Medium |
| P2D32 | Intake Manifold Tuning Valve Control Circuit Driver Current/Temperature Too High Bank 1 | Fuel Metering | Medium |
| P2D33 | Hybrid/EV Battery Inductive Charger Control Module Processor Performance | Fuel Metering | Medium |
| P2D34 | Hybrid/EV Battery Inductive Charger Control Circuit Range/Performance | Fuel Metering | Medium |
| P2D35 | Hybrid/EV Battery Inductive Charging System High Voltage Interlock Circuit Performance | Fuel Metering | Medium |
| P2D36 | Hybrid/EV Battery Inductive Charger Output Voltage Performance | Fuel Metering | Medium |
| P2D37 | Hybrid/EV Battery Inductive Charger Input Circuit Range/Performance | Fuel Metering | Medium |
| P2D38 | Hybrid/EV Battery Pack Heater Performance | Fuel Metering | Medium |
| P2D39 | Forced Hybrid/EV Battery Disconnect | Fuel Metering | Medium |
| P2D3A | Forced Hybrid/EV System Shutdown | Fuel Metering | Medium |
| P2D3B | Hybrid/EV Discharge System Fault | Fuel Metering | Medium |
| P2D3C | Cold Start Hybrid/EV Drive Motor Performance | Fuel Metering | Medium |
| P2D3D | Cold Start Hybrid/EV Drive Motor Inverter Torque Performance | Fuel Metering | Medium |
| P2D3E | Cold Start Hybrid/EV Battery Performance | Fuel Metering | Medium |
| P2D3F | Hybrid/EV Battery Cooling System B Performance | Fuel Metering | Medium |
| P2D40 | Hybrid/EV Battery Cooling System C Performance | Fuel Metering | Medium |
| P2D41 | A/C Compressor Motor Voltage B Performance | Fuel Metering | Medium |
| P2D42 | A/C Compressor Motor Voltage B Low | Fuel Metering | Medium |
| P2D43 | A/C Compressor Motor Voltage B High | Fuel Metering | Medium |
| P2D44 | A/C Compressor Motor Performance | Fuel Metering | Medium |
| P2D45 | Reductant Temperature Too Low | Fuel Metering | Medium |
| P2D46 | Hybrid/EV Battery Pack B Over Temperature | Fuel Metering | Medium |
| P2D47 | Hybrid/EV Battery Pack C Over Temperature | Fuel Metering | Medium |
| P2D48 | Hybrid/EV Battery Pack D Over Temperature | Fuel Metering | Medium |
| P2D49 | Hybrid/EV Battery Pack E Over Temperature | Fuel Metering | Medium |
| P2D4A | Hybrid/EV Battery Pack F Over Temperature | Fuel Metering | Medium |
| P2D4B | Hybrid/EV Battery Pack G Over Temperature | Fuel Metering | Medium |
| P2D4C | Hybrid/EV Battery Pack H Over Temperature | Fuel Metering | Medium |
| P2D4D | Hybrid/EV Battery Pack I Over Temperature | 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.