Fuel System Codes
5,039 OBD-II diagnostic trouble codes in this category.
Showing page 3 of 51 (5,039 codes total)
| Code | Description | Subsystem | Severity |
|---|---|---|---|
| P019E | Alternative Fuel Tank A Pressure Sensor Circuit | Fuel Metering | Medium |
| P019F | Alternative Fuel Tank A Pressure Sensor Performance | Fuel Metering | Medium |
| P01A0 | Alternative Fuel Tank A Pressure Sensor Circuit Low | Fuel Metering | Medium |
| P01A1 | Alternative Fuel Tank A Pressure Sensor Circuit High | Fuel Metering | Medium |
| P01A2 | Alternative Fuel Tank A Pressure Sensor Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P01A3 | Alternative Fuel Rail Pressure Sensor Circuit | Fuel Metering | Medium |
| P01A4 | Alternative Fuel Rail Pressure Sensor Performance | Fuel Metering | Medium |
| P01A5 | Alternative Fuel Rail Pressure Sensor Circuit Low | Fuel Metering | Medium |
| P01A6 | Alternative Fuel Rail Pressure Sensor Circuit High | Fuel Metering | Medium |
| P01A7 | Alternative Fuel Rail Pressure Sensor Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P01A8 | Alternative Fuel Rail/System Pressure - Too Low | Fuel Metering | Medium |
| P01A9 | Alternative Fuel Rail/System Pressure - Too High | Fuel Metering | Medium |
| P01AA | Alternative Fuel Tank Temperature Sensor Circuit | Fuel Metering | Medium |
| P01AB | Alternative Fuel Tank Temperature Sensor Range/Performance | Fuel Metering | Medium |
| P01AC | Alternative Fuel Tank Temperature Sensor Circuit Low | Fuel Metering | Medium |
| P01AD | Alternative Fuel Tank Temperature Sensor Circuit High | Fuel Metering | Medium |
| P01AE | Alternative Fuel Tank Temperature Sensor Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P01AF | Alternative Fuel Tank A Level Sensor Circuit | Fuel Metering | Medium |
| P01B0 | Alternative Fuel Tank A Level Sensor Range/Performance | Fuel Metering | Medium |
| P01B1 | Alternative Fuel Tank A Level Sensor Circuit Low | Fuel Metering | Medium |
| P01B2 | Alternative Fuel Tank A Level Sensor Circuit High | Fuel Metering | Medium |
| P01B3 | Alternative Fuel Tank A Level Sensor Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P01B4 | Alternative Fuel Rail Temperature Sensor Circuit | Fuel Metering | Medium |
| P01B5 | Alternative Fuel Rail Temperature Sensor Performance | Fuel Metering | Medium |
| P01B6 | Alternative Fuel Rail Temperature Sensor Circuit Low | Fuel Metering | Medium |
| P01B7 | Alternative Fuel Rail Temperature Sensor Circuit High | Fuel Metering | Medium |
| P01B8 | Alternative Fuel Rail Temperature Sensor Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P01B9 | Engine Oil Temperature Sensor B Circuit | Fuel Metering | Medium |
| P01BA | Engine Oil Temperature Sensor B Range/Performance | Fuel Metering | Medium |
| P01BB | Engine Oil Temperature Sensor B Circuit Low | Fuel Metering | Medium |
| P01BC | Engine Oil Temperature Sensor B Circuit High | Fuel Metering | Medium |
| P01BD | Engine Oil Temperature Sensor B Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P01BE | Fuel Rail Pressure Sensor Circuit Bank 2 | Fuel Metering | Medium |
| P01BF | Fuel Rail Pressure Sensor Circuit Range/Performance Bank 2 | Fuel Metering | Medium |
| P01C0 | Fuel Rail Pressure Sensor Circuit Low Bank 2 | Fuel Metering | Medium |
| P01C1 | Fuel Rail Pressure Sensor Circuit High Bank 2 | Fuel Metering | Medium |
| P01C2 | Fuel Rail Pressure Sensor Circuit Intermittent/Erratic Bank 2 | Fuel Metering | Medium |
| P01C3 | Fuel Pressure Sensor A Circuit | Fuel Metering | Medium |
| P01C4 | Fuel Pressure Sensor A Circuit Range/Performance | Fuel Metering | Medium |
| P01C5 | Fuel Pressure Sensor A Circuit Low | Fuel Metering | Medium |
| P01C6 | Fuel Pressure Sensor A Circuit High | Fuel Metering | Medium |
| P01C7 | Fuel Pressure Sensor A Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P01C8 | Fuel Rail/System Pressure - Too Low Bank 2 | Fuel Metering | Medium |
| P01C9 | Fuel Rail/System Pressure - Too High Bank 2 | Fuel Metering | Medium |
| P01EA | Engine Coolant Heater A Control Circuit High | Fuel Metering | Medium |
| P01EB | Engine Coolant Heater A Control Circuit Performance | Fuel Metering | Medium |
| P01EC | Engine Coolant Heater B Control Circuit/Open | Fuel Metering | Medium |
| P01ED | Engine Coolant Heater B Control Circuit Low | Fuel Metering | Medium |
| P01EE | Engine Coolant Heater B Control Circuit High | Fuel Metering | Medium |
| P01EF | Engine Coolant Heater B Control Circuit Performance | Fuel Metering | Medium |
| P01F0 | Coolant Temperature Relapsed Below Diagnostic Monitoring Temperature | Fuel Metering | Medium |
| P01F8 | Engine Coolant Heater A Control Circuit Driver Current/Temperature Too High | Fuel Metering | Medium |
| P01F9 | Engine Coolant Heater B Control Circuit Driver Current/Temperature Too High | Fuel Metering | Medium |
| P0200 | Injector Circuit Malfunction | Fuel Injector | Medium |
| P0201 | Injector Circuit Malfunction - Cylinder 1 | Fuel Injector | Medium |
| P0202 | Injector Circuit Malfunction - Cylinder 2 | Fuel Injector | Medium |
| P0203 | Injector Circuit Malfunction - Cylinder 3 | Fuel Injector | Medium |
| P0204 | Injector Circuit Malfunction - Cylinder 4 | Fuel Injector | Medium |
| P0205 | Injector Circuit Malfunction - Cylinder 5 | Fuel Injector | Medium |
| P0206 | Injector Circuit Malfunction - Cylinder 6 | Fuel Injector | Medium |
| P0207 | Injector Circuit Malfunction - Cylinder 7 | Fuel Injector | Medium |
| P0208 | Injector Circuit Malfunction - Cylinder 8 | Fuel Injector | Medium |
| P0209 | Injector Circuit Malfunction - Cylinder 9 | Fuel Injector | Medium |
| P0210 | Injector Circuit Malfunction - Cylinder 10 | Fuel Injector | Medium |
| P0211 | Injector Circuit Malfunction - Cylinder 11 | Fuel Injector | Medium |
| P0212 | Injector Circuit Malfunction - Cylinder 12 | Fuel Injector | Medium |
| P0213 | Cold Start Injector 1 | Cold Start | Medium |
| P0214 | Cold Start Injector 2 | Cold Start | Medium |
| P0215 | Engine Shutoff Solenoid Malfunction | Fuel Shutoff | High |
| P0216 | Injection Timing Control Circuit | Fuel Timing | High |
| P0217 | Engine Over Temperature Condition | Cooling | Critical |
| P0219 | Engine Over Speed Condition | RPM Control | High |
| P022A | Charge Air Cooler Bypass Control A Circuit /Open | Fuel Metering | Medium |
| P022B | Charge Air Cooler Bypass Control A Circuit Low | Fuel Metering | Medium |
| P022C | Charge Air Cooler Bypass Control A Circuit High | Fuel Metering | Medium |
| P022D | Charge Air Cooler Bypass Control B Circuit /Open | Fuel Metering | Medium |
| P022E | Charge Air Cooler Bypass Control B Circuit Low | Fuel Metering | Medium |
| P022F | Charge Air Cooler Bypass Control B Circuit High | Fuel Metering | Medium |
| P0230 | Fuel Pump Primary Circuit Malfunction | Fuel Pump | High |
| P0231 | Fuel Pump Secondary Circuit Low | Fuel Pump | High |
| P0232 | Fuel Pump Secondary Circuit High | Fuel Pump | High |
| P0233 | Fuel Pump Secondary Circuit Intermittent | Fuel Pump | Medium |
| P0234 | Engine Over Boost Condition | Turbocharger | High |
| P0235 | Turbocharger Boost Sensor A Circuit | Turbocharger | Medium |
| P023A | Charge Air Cooler Coolant Pump A Control Circuit/Open | Fuel Metering | Medium |
| P023B | Charge Air Cooler Coolant Pump A Control Circuit Low | Fuel Metering | Medium |
| P023C | Charge Air Cooler Coolant Pump A Control Circuit High | Fuel Metering | Medium |
| P023F | Fuel Pump Secondary Circuit/Open | Fuel Metering | Medium |
| P0243 | Turbocharger Wastegate Solenoid A | Turbocharger | Medium |
| P0244 | Turbocharger Wastegate Solenoid A Range/Performance | Turbocharger | Medium |
| P024A | Charge Air Cooler Bypass Control A Range/Performance | Fuel Metering | Medium |
| P024B | Charge Air Cooler Bypass Control A Stuck | Fuel Metering | Medium |
| P024C | Charge Air Cooler Bypass Position Sensor A Circuit | Fuel Metering | Medium |
| P024D | Charge Air Cooler Bypass Position Sensor A Circuit Range/Performance | Fuel Metering | Medium |
| P024E | Charge Air Cooler Bypass Position Sensor A Circuit Low | Fuel Metering | Medium |
| P024F | Charge Air Cooler Bypass Position Sensor A Circuit High | Fuel Metering | Medium |
| P0251 | Injection Pump Fuel Metering Control A Cam/Rotor | Diesel Injection | High |
| P0252 | Injection Pump Fuel Metering Control A Range/Performance | Diesel Injection | Medium |
| P0253 | Injection Pump Fuel Metering Control A Low | Diesel Injection | High |
| P0254 | Injection Pump Fuel Metering Control A High | Diesel Injection | High |
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.