Fuel System Codes
5,039 OBD-II diagnostic trouble codes in this category.
Showing page 4 of 51 (5,039 codes total)
| Code | Description | Subsystem | Severity |
|---|---|---|---|
| P0255 | Injection Pump Fuel Metering Control A Intermittent | Diesel Injection | Medium |
| P0256 | Injection Pump Fuel Metering Control B Cam/Rotor | Diesel Injection | High |
| P0257 | Injection Pump Fuel Metering Control B Range/Performance (Cam/Rotor/Injector) | Fuel Injection | Medium |
| P0258 | Injection Pump Fuel Metering Control B Low (Cam/Rotor/Injector) | Fuel Injection | Medium |
| P0259 | Injection Pump Fuel Metering Control B High (Cam/Rotor/Injector) | Fuel Injection | Medium |
| P025A | Fuel Pump Module A Control Circuit/Open | Fuel Metering | Medium |
| P025B | Fuel Pump Module A Control Circuit Range/Performance | Fuel Metering | Medium |
| P025C | Fuel Pump Module A Control Circuit Low | Fuel Metering | Medium |
| P025D | Fuel Pump Module A Control Circuit High | Fuel Metering | Medium |
| P0260 | Injection Pump Fuel Metering Control B Intermittent (Cam/Rotor/Injector) | Fuel Injection | Medium |
| P0261 | Cylinder 1 Injector Circuit Low | Fuel Injector | Medium |
| P0262 | Cylinder 1 Injector Circuit High | Fuel Injector | Medium |
| P0263 | Cylinder 1 Contribution/Balance | Fuel Injector | Medium |
| P0264 | Cylinder 2 Injector Circuit Low | Fuel Injection | Medium |
| P0265 | Cylinder 2 Injector Circuit High | Fuel Injection | Medium |
| P0266 | Cylinder 2 Contribution/Balance | Fuel Injection | Medium |
| P0267 | Cylinder 3 Injector Circuit Low | Fuel Injection | Medium |
| P0268 | Cylinder 3 Injector Circuit High | Fuel Injection | Medium |
| P0269 | Cylinder 3 Contribution/Balance | Fuel Injection | Medium |
| P026A | Charge Air Cooler Efficiency Below Threshold | Fuel Metering | Medium |
| P026C | Fuel Injection Quantity A Lower Than Expected | Fuel Metering | Medium |
| P026D | Fuel Injection Quantity A Higher Than Expected | Fuel Metering | Medium |
| P026E | Charge Air Cooler Coolant Pump A Performance | Fuel Metering | Medium |
| P026F | Coolant Thermostat Performance | Fuel Metering | Medium |
| P0270 | Cylinder 4 Injector Circuit Low | Fuel Injection | Medium |
| P0271 | Cylinder 4 Injector Circuit High | Fuel Injection | Medium |
| P0272 | Cylinder 4 Contribution/Balance | Fuel Injection | Medium |
| P0273 | Cylinder 5 Injector Circuit Low | Fuel Injection | Medium |
| P0274 | Cylinder 5 Injector Circuit High | Fuel Injection | Medium |
| P0275 | Cylinder 5 Contribution/Balance | Fuel Injection | Medium |
| P0276 | Cylinder 6 Injector Circuit Low | Fuel Injection | Medium |
| P0277 | Cylinder 6 Injector Circuit High | Fuel Injection | Medium |
| P0278 | Cylinder 6 Contribution/Balance | Fuel Injection | Medium |
| P0279 | Cylinder 7 Injector Circuit Low | Fuel Injection | Medium |
| P027A | Fuel Pump Module B Control Circuit/Open | Fuel Metering | Medium |
| P027B | Fuel Pump Module B Control Circuit Range/Performance | Fuel Metering | Medium |
| P027C | Fuel Pump Module B Control Circuit Low | Fuel Metering | Medium |
| P027D | Fuel Pump Module B Control Circuit High | Fuel Metering | Medium |
| P027E | Cold Start Fuel Injection Quantity A Lower Than Expected | Fuel Metering | Medium |
| P027F | Cold Start Fuel Injection Quantity A Higher Than Expected | Fuel Metering | Medium |
| P0280 | Cylinder 7 Injector Circuit High | Fuel Injection | Medium |
| P0281 | Cylinder 7 Contribution/Balance | Fuel Injection | Medium |
| P0282 | Cylinder 8 Injector Circuit Low | Fuel Injection | Medium |
| P0283 | Cylinder 8 Injector Circuit High | Fuel Injection | Medium |
| P0284 | Cylinder 8 Contribution/Balance | Fuel Injection | Medium |
| P0285 | Cylinder 9 Injector Circuit Low | Fuel Injection | Medium |
| P0286 | Cylinder 9 Injector Circuit High | Fuel Injection | Medium |
| P0287 | Cylinder 9 Contribution/Balance | Fuel Injection | Medium |
| P0288 | Cylinder 10 Injector Circuit Low | Fuel Injection | Medium |
| P0289 | Cylinder 10 Injector Circuit High | Fuel Injection | Medium |
| P028A | Charge Air Cooler Cooling Fan Control Circuit/Open | Fuel Metering | Medium |
| P028B | Charge Air Cooler Cooling Fan Performance/Stuck Off | Fuel Metering | Medium |
| P028C | Charge Air Cooler Cooling Fan Stuck On | Fuel Metering | Medium |
| P028D | Charge Air Cooler Cooling Fan Control Circuit Low | Fuel Metering | Medium |
| P028E | Charge Air Cooler Cooling Fan Control Circuit High | Fuel Metering | Medium |
| P028F | Charge Air Cooler Cooling Fan Control Circuit Driver Performance | Fuel Metering | Medium |
| P0290 | Cylinder 10 Contribution/Balance | Fuel Injection | Medium |
| P0291 | Cylinder 11 Injector Circuit Low | Fuel Injection | Medium |
| P0292 | Cylinder 11 Injector Circuit High | Fuel Injection | Medium |
| P0293 | Cylinder 11 Contribution/Balance | Fuel Injection | Medium |
| P0294 | Cylinder 12 Injector Circuit Low | Fuel Injection | Medium |
| P0295 | Cylinder 12 Injector Circuit High | Fuel Injection | Medium |
| P0296 | Cylinder 12 Contribution/Balance | Fuel Injection | Medium |
| P029A | Cylinder 1 - Fuel Trim at Max Limit | Fuel Metering | Medium |
| P029B | Cylinder 1 - Fuel Trim at Min Limit | Fuel Metering | Medium |
| P029C | Cylinder 1 - Injector Restricted | Fuel Metering | Medium |
| P029D | Cylinder 1 - Injector Leaking | Fuel Metering | Medium |
| P029E | Cylinder 2 - Fuel Trim at Max Limit | Fuel Metering | Medium |
| P029F | Cylinder 2 - Fuel Trim at Min Limit | Fuel Metering | Medium |
| P02A0 | Cylinder 2 - Injector Restricted | Fuel Metering | Medium |
| P02A1 | Cylinder 2 - Injector Leaking | Fuel Metering | Medium |
| P02A2 | Cylinder 3 - Fuel Trim at Max Limit | Fuel Metering | Medium |
| P02A3 | Cylinder 3 - Fuel Trim at Min Limit | Fuel Metering | Medium |
| P02A4 | Cylinder 3 - Injector Restricted | Fuel Metering | Medium |
| P02A5 | Cylinder 3 - Injector Leaking | Fuel Metering | Medium |
| P02A6 | Cylinder 4 - Fuel Trim at Max Limit | Fuel Metering | Medium |
| P02A7 | Cylinder 4 - Fuel Trim at Min Limit | Fuel Metering | Medium |
| P02A8 | Cylinder 4 - Injector Restricted | Fuel Metering | Medium |
| P02A9 | Cylinder 4 - Injector Leaking | Fuel Metering | Medium |
| P02AA | Cylinder 5 - Fuel Trim at Max Limit | Fuel Metering | Medium |
| P02AB | Cylinder 5 - Fuel Trim at Min Limit | Fuel Metering | Medium |
| P02AC | Cylinder 5 - Injector Restricted | Fuel Metering | Medium |
| P02AD | Cylinder 5 - Injector Leaking | Fuel Metering | Medium |
| P02AE | Cylinder 6 - Fuel Trim at Max Limit | Fuel Metering | Medium |
| P02AF | Cylinder 6 - Fuel Trim at Min Limit | Fuel Metering | Medium |
| P02B0 | Cylinder 6 - Injector Restricted | Fuel Metering | Medium |
| P02B1 | Cylinder 6 - Injector Leaking | Fuel Metering | Medium |
| P02B2 | Cylinder 7 - Fuel Trim at Max Limit | Fuel Metering | Medium |
| P02B3 | Cylinder 7 - Fuel Trim at Min Limit | Fuel Metering | Medium |
| P02B4 | Cylinder 7 - Injector Restricted | Fuel Metering | Medium |
| P02B5 | Cylinder 7 - Injector Leaking | Fuel Metering | Medium |
| P02B6 | Cylinder 8 - Fuel Trim at Max Limit | Fuel Metering | Medium |
| P02B7 | Cylinder 8 - Fuel Trim at Min Limit | Fuel Metering | Medium |
| P02B8 | Cylinder 8 - Injector Restricted | Fuel Metering | Medium |
| P02B9 | Cylinder 8 - Injector Leaking | Fuel Metering | Medium |
| P02BA | Cylinder 9 - Fuel Trim at Max Limit | Fuel Metering | Medium |
| P02BB | Cylinder 9 - Fuel Trim at Min Limit | Fuel Metering | Medium |
| P02BC | Cylinder 9 - Injector Restricted | Fuel Metering | Medium |
| P02BD | Cylinder 9 - Injector Leaking | Fuel Metering | Medium |
| P02BE | Cylinder 10 - Fuel Trim at Max Limit | 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.