Fuel System Codes
5,039 OBD-II diagnostic trouble codes in this category.
Showing page 36 of 51 (5,039 codes total)
| Code | Description | Subsystem | Severity |
|---|---|---|---|
| P247A | Exhaust Gas Temperature Out of Range Bank 1 Sensor 3 | Fuel Injection | Medium |
| P247B | Exhaust Gas Temperature Out of Range Bank 1 Sensor 4 | Fuel Injection | Medium |
| P247C | Exhaust Gas Temperature Out of Range Bank 2 Sensor 1 | Fuel Injection | Medium |
| P247D | Exhaust Gas Temperature Out of Range Bank 2 Sensor 2 | Fuel Injection | Medium |
| P247E | Exhaust Gas Temperature Out of Range Bank 2 Sensor 3 | Fuel Injection | Medium |
| P247F | Exhaust Gas Temperature Out of Range Bank 2 Sensor 4 | Fuel Injection | Medium |
| P248A | Reductant Heater A Sense Circuit Low | Fuel Injection | Medium |
| P248B | Reductant Heater A Sense Circuit High | Fuel Injection | Medium |
| P248C | Reductant Heater B Sense Circuit Low | Fuel Injection | Medium |
| P248D | Reductant Heater B Sense Circuit High | Fuel Injection | Medium |
| P248E | EGR Cooler Bypass Control Circuit/Open Bank 2 | Fuel Injection | Medium |
| P248F | EGR Cooler Bypass Control Circuit Range/Performance Bank 2 | Fuel Injection | Medium |
| P249A | EGR Cooler Bypass Position Sensor Circuit High Bank 2 | Fuel Injection | Medium |
| P249B | EGR Cooler Bypass Position Sensor Circuit Intermittent/Erratic Bank 2 | Fuel Injection | Medium |
| P249C | Excessive Time To Enter Closed Loop Reductant Injection Control | Fuel Injection | Medium |
| P249D | Closed Loop Reductant Injection Control At Limit - Flow Too Low | Fuel Injection | Medium |
| P249E | Closed Loop Reductant Injection Control At Limit - Flow Too High | Fuel Injection | Medium |
| P249F | Excessive Time To Enter Closed Loop Particulate Filter Regeneration Control | Fuel Injection | Medium |
| P24A0 | Closed Loop Particulate Filter Regeneration Control At Limit - Temperature Too Low | Fuel Metering | Medium |
| P24A1 | Closed Loop Particulate Filter Regeneration Control At Limit - Temperature Too High | Fuel Metering | Medium |
| P24A2 | Particulate Filter Regeneration Incomplete Bank 1 | Fuel Metering | Medium |
| P24A3 | Particulate Filter Restriction - Soot Accumulation Bank 2 | Fuel Metering | Medium |
| P24A4 | Particulate Filter Restriction - Soot Accumulation Too High Bank 1 | Fuel Metering | Medium |
| P24A5 | EGR Cooler Bypass Control Stuck/Open Bank 1 | Fuel Metering | Medium |
| P24A6 | EGR Cooler Bypass Control Stuck/Open Bank 2 | Fuel Metering | Medium |
| P24A7 | EGR Cooler Coolant Pump Control Circuit/Open | Fuel Metering | Medium |
| P24A8 | EGR Cooler Coolant Pump Performance/Stuck Off | Fuel Metering | Medium |
| P24A9 | EGR Cooler Coolant Pump Control Circuit Low | Fuel Metering | Medium |
| P24AA | EGR Cooler Coolant Pump Control Circuit High | Fuel Metering | Medium |
| P24AB | EGR Cooler Coolant Pump Stuck On | Fuel Metering | Medium |
| P24AC | EGR Cooler Coolant Pump Feedback Circuit Low | Fuel Metering | Medium |
| P24AD | EGR Cooler Coolant Pump Feedback Circuit High | Fuel Metering | Medium |
| P24AE | Particulate Matter Sensor Circuit | Fuel Metering | Medium |
| P24AF | Particulate Matter Sensor Circuit Range/Performance | Fuel Metering | Medium |
| P24B0 | Particulate Matter Sensor Circuit Low | Fuel Metering | Medium |
| P24B1 | Particulate Matter Sensor Circuit High | Fuel Metering | Medium |
| P24B2 | Particulate Matter Sensor Circuit Intermittent | Fuel Metering | Medium |
| P24B3 | Particulate Matter Sensor Heater Control Circuit/Open | Fuel Metering | Medium |
| P24B4 | Particulate Matter Sensor Heater Control Circuit Range/Performance | Fuel Metering | Medium |
| P24B5 | Particulate Matter Sensor Heater Control Circuit Low | Fuel Metering | Medium |
| P24B6 | Particulate Matter Sensor Heater Control Circuit High | Fuel Metering | Medium |
| P24B7 | Particulate Matter Sensor Heater Resistance | Fuel Metering | Medium |
| P24B8 | EVAP System Leak Detection Pump Pressure Sensor Circuit | Fuel Metering | Medium |
| P24B9 | EVAP System Leak Detection Pump Pressure Sensor Circuit Range/Performance | Fuel Metering | Medium |
| P24BA | EVAP System Leak Detection Pump Pressure Sensor Circuit Low | Fuel Metering | Medium |
| P24BB | EVAP System Leak Detection Pump Pressure Sensor Circuit High | Fuel Metering | Medium |
| P24BC | EVAP System Leak Detection Pump Pressure Sensor Circuit Intermittent | Fuel Metering | Medium |
| P24BD | EVAP System Leak Detection Pump Switching Valve Control Circuit/Open | Fuel Metering | Medium |
| P24BE | EVAP System Leak Detection Pump Switching Valve Control Circuit Low | Fuel Metering | Medium |
| P24BF | EVAP System Leak Detection Pump Switching Valve Control Circuit High | Fuel Metering | Medium |
| P24C0 | EVAP System Leak Detection Pump Switching Valve Stuck On | Fuel Metering | Medium |
| P24C1 | EVAP System Leak Detection Pump Switching Valve Performance/Stuck Off | Fuel Metering | Medium |
| P24C2 | Exhaust Gas Temperature Measurement System - Multiple Sensor Correlation Bank 1 | Fuel Metering | Medium |
| P24C3 | Exhaust Gas Temperature Measurement System - Multiple Sensor Correlation Bank 2 | Fuel Metering | Medium |
| P24C4 | EGR Cooler Bypass Position Sensor Exceeded Learning Limit Bank 1 | Fuel Metering | Medium |
| P24C5 | EGR Cooler Bypass Position Sensor Exceeded Learning Limit Bank 2 | Fuel Metering | Medium |
| P24C6 | Particulate Matter Sensor Temperature Circuit | Fuel Metering | Medium |
| P24C7 | Particulate Matter Sensor Temperature Circuit Range/performance | Fuel Metering | Medium |
| P24C8 | Particulate Matter Sensor Temperature Circuit Low | Fuel Metering | Medium |
| P24C9 | Particulate Matter Sensor Temperature Circuit High | Fuel Metering | Medium |
| P24CA | Particulate Matter Sensor Temperature Circuit Intermittent | Fuel Metering | Medium |
| P24CB | Reductant Tank Cap Switch Circuit | Fuel Metering | Medium |
| P24CC | Reductant Tank Cap Switch Circuit Range/Performance | Fuel Metering | Medium |
| P24CD | Reductant Tank Cap Switch Circuit Low | Fuel Metering | Medium |
| P24CE | Reductant Tank Cap Switch Circuit High | Fuel Metering | Medium |
| P24CF | Reductant Tank Cap Switch Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P24D0 | Particulate Matter Sensor Supply Voltage Circuit Low | Fuel Metering | Medium |
| P24D1 | Particulate Matter Sensor Regeneration Incomplete | Fuel Metering | Medium |
| P24D2 | Reductant Heater A Sense Circuit | Fuel Metering | Medium |
| P24D3 | Reductant Heater B Sense Circuit | Fuel Metering | Medium |
| P24D4 | EGR Cooler Coolant Pump Feedback Circuit | Fuel Metering | Medium |
| P24D5 | EVAP System Pressure Sensor/Switch B Circuit | Fuel Metering | Medium |
| P24D6 | EVAP System Pressure Sensor/Switch B Circuit Range/Performance | Fuel Metering | Medium |
| P24D7 | EVAP System Pressure Sensor/Switch B Circuit Low | Fuel Metering | Medium |
| P24D8 | EVAP System Pressure Sensor/Switch B Circuit High | Fuel Metering | Medium |
| P24D9 | EVAP System Pressure Sensor/Switch B Circuit Intermittent | Fuel Metering | Medium |
| P24DA | Particulate Matter Sensor Exhaust Sample Error Bank 1 | Fuel Metering | Medium |
| P24DB | Reductant Purge Control Valve B Circuit /Open | Fuel Metering | Medium |
| P24DC | Reductant Purge Control Valve B Performance | Fuel Metering | Medium |
| P24DD | Reductant Purge Control Valve B Circuit Low | Fuel Metering | Medium |
| P24DE | Reductant Purge Control Valve B Circuit High | Fuel Metering | Medium |
| P24DF | Reductant Purge Control Valve B Stuck Open | Fuel Metering | Medium |
| P24E0 | Reductant Purge Control Valve B Stuck Closed | Fuel Metering | Medium |
| P24E1 | NH3 Sensor Circuit | Fuel Injection | Medium |
| P24EA | NH3 Sensor Supply Voltage Circuit | Fuel Metering | Medium |
| P24EB | NH3 Sensor Supply Voltage Circuit Low | Fuel Metering | Medium |
| P24EC | NH3 Sensor Supply Voltage Circuit High | Fuel Metering | Medium |
| P24ED | NH3 Sensor Calibration Memory | Fuel Metering | Medium |
| P24EE | NH3 Sensor Processor Performance | Fuel Metering | Medium |
| P24EF | Control Module Wake-up Circuit/Open | Fuel Metering | Medium |
| P24F0 | Control Module Wake-up Circuit Low | Fuel Metering | Medium |
| P24F1 | Control Module Wake-up Circuit High | Fuel Metering | Medium |
| P24F2 | EGR Temperature/Charge Air Cooler Temperature Correlation | Fuel Metering | Medium |
| P24F3 | Reductant Tank Temperature/Fuel Temperature Correlation | Fuel Metering | Medium |
| P24F4 | NOx Sensor Delayed Response - High to Low Bank 1 Sensor 1 | Fuel Metering | Medium |
| P24F5 | NOx Sensor Delayed Response - High to Low Bank 1 Sensor 2 | Fuel Metering | Medium |
| P24F6 | Exhaust Aftertreatment Fuel Air Purge Valve Stuck Open | Fuel Metering | Medium |
| P24F7 | Exhaust Aftertreatment Fuel Air Purge Valve Stuck Closed | Fuel Metering | Medium |
| P24F8 | Exhaust Aftertreatment Fuel Air Purge Valve Control Circuit | Fuel Metering | Medium |
| P24F9 | Exhaust Aftertreatment Fuel Air Purge Valve Control Circuit Range/Performance | 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.