Fuel System Codes
5,039 OBD-II diagnostic trouble codes in this category.
Showing page 5 of 51 (5,039 codes total)
| Code | Description | Subsystem | Severity |
|---|---|---|---|
| P02BF | Cylinder 10 - Fuel Trim at Min Limit | Fuel Metering | Medium |
| P02C0 | Cylinder 10 - Injector Restricted | Fuel Metering | Medium |
| P02C1 | Cylinder 10 - Injector Leaking | Fuel Metering | Medium |
| P02C2 | Cylinder 11 - Fuel Trim at Max Limit | Fuel Metering | Medium |
| P02C3 | Cylinder 11 - Fuel Trim at Min Limit | Fuel Metering | Medium |
| P02C4 | Cylinder 11 - Injector Restricted | Fuel Metering | Medium |
| P02C5 | Cylinder 11 - Injector Leaking | Fuel Metering | Medium |
| P02C6 | Cylinder 12 - Fuel Trim at Max Limit | Fuel Metering | Medium |
| P02C7 | Cylinder 12 - Fuel Trim at Min Limit | Fuel Metering | Medium |
| P02C8 | Cylinder 12 - Injector Restricted | Fuel Metering | Medium |
| P02C9 | Cylinder 12 - Injector Leaking | Fuel Metering | Medium |
| P02CC | Cylinder 1 Fuel Injector A Offset Learning At Min Limit | Fuel Metering | Medium |
| P02CD | Cylinder 1 Fuel Injector A Offset Learning At Max Limit | Fuel Metering | Medium |
| P02CE | Cylinder 2 Fuel Injector A Offset Learning At Min Limit | Fuel Metering | Medium |
| P02CF | Cylinder 2 Fuel Injector A Offset Learning At Max Limit | Fuel Metering | Medium |
| P02D0 | Cylinder 3 Fuel Injector A Offset Learning At Min Limit | Fuel Metering | Medium |
| P02D1 | Cylinder 3 Fuel Injector A Offset Learning At Max Limit | Fuel Metering | Medium |
| P02D2 | Cylinder 4 Fuel Injector A Offset Learning At Min Limit | Fuel Metering | Medium |
| P02D3 | Cylinder 4 Fuel Injector A Offset Learning At Max Limit | Fuel Metering | Medium |
| P02D4 | Cylinder 5 Fuel Injector A Offset Learning At Min Limit | Fuel Metering | Medium |
| P02D5 | Cylinder 5 Fuel Injector A Offset Learning At Max Limit | Fuel Metering | Medium |
| P02D6 | Cylinder 6 Fuel Injector A Offset Learning At Min Limit | Fuel Metering | Medium |
| P02D7 | Cylinder 6 Fuel Injector A Offset Learning At Max Limit | Fuel Metering | Medium |
| P02D8 | Cylinder 7 Fuel Injector A Offset Learning At Min Limit | Fuel Metering | Medium |
| P02D9 | Cylinder 7 Fuel Injector A Offset Learning At Max Limit | Fuel Metering | Medium |
| P02DA | Cylinder 8 Fuel Injector A Offset Learning At Min Limit | Fuel Metering | Medium |
| P02DB | Cylinder 8 Fuel Injector A Offset Learning At Max Limit | Fuel Metering | Medium |
| P02DC | Cylinder 9 Fuel Injector A Offset Learning At Min Limit | Fuel Metering | Medium |
| P02DD | Cylinder 9 Fuel Injector A Offset Learning At Max Limit | Fuel Metering | Medium |
| P02DE | Cylinder 10 Fuel Injector A Offset Learning At Min Limit | Fuel Metering | Medium |
| P02DF | Cylinder 10 Fuel Injector A Offset Learning At Max Limit | Fuel Metering | Medium |
| P02E0 | Diesel Intake Air Flow A Control Circuit/Open | Fuel Metering | Medium |
| P02E1 | Diesel Intake Air Flow A Control Performance | Fuel Metering | Medium |
| P02E2 | Diesel Intake Air Flow A Control Circuit Low | Fuel Injection | Medium |
| P02EA | Diesel Intake Air Flow A Position Sensor Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P02EB | Diesel Intake Air Flow A Control Motor Current Range/Performance | Fuel Metering | Medium |
| P02EC | Diesel Intake Air Flow A Control System - High Air Flow Detected | Fuel Metering | Medium |
| P02ED | Diesel Intake Air Flow A Control System - Low Air Flow Detected | Fuel Metering | Medium |
| P02EE | Cylinder 1 Injector Circuit Range/Performance | Fuel Metering | Medium |
| P02EF | Cylinder 2 Injector Circuit Range/Performance | Fuel Metering | Medium |
| P02F0 | Cylinder 3 Injector Circuit Range/Performance | Fuel Metering | Medium |
| P02F1 | Cylinder 4 Injector Circuit Range/Performance | Fuel Metering | Medium |
| P02F2 | Cylinder 5 Injector Circuit Range/Performance | Fuel Metering | Medium |
| P02F3 | Cylinder 6 Injector Circuit Range/Performance | Fuel Metering | Medium |
| P02F4 | Cylinder 7 Injector Circuit Range/Performance | Fuel Metering | Medium |
| P02F5 | Cylinder 8 Injector Circuit Range/Performance | Fuel Metering | Medium |
| P02F6 | Cylinder 9 Injector Circuit Range/Performance | Fuel Metering | Medium |
| P02F7 | Cylinder 10 Injector Circuit Range/Performance | Fuel Metering | Medium |
| P02F8 | Cylinder 11 Injector Circuit Range/Performance | Fuel Metering | Medium |
| P02F9 | Cylinder 12 Injector Circuit Range/Performance | Fuel Metering | Medium |
| P02FA | Diesel Intake Air Flow Position Sensor Minimum/Maximum Stop Performance | Fuel Metering | Medium |
| P02FB | Cold Start Fuel Injection Control Circuit/Open | Fuel Metering | Medium |
| P02FC | Cold Start Fuel Injection Control Circuit Low | Fuel Metering | Medium |
| P02FD | Cold Start Fuel Injection Control Circuit High | Fuel Metering | Medium |
| P02FE | Cold Start Fuel Injection Control Circuit Range/Performance | Fuel Metering | Medium |
| P02FF | Propulsion System Inactive Timer Performance | Fuel Metering | Medium |
| P032A | Knock/Combustion Vibration Sensor C Circuit | Fuel Metering | Medium |
| P032B | Knock/Combustion Vibration Sensor C Circuit Range/Performance | Fuel Metering | Medium |
| P032C | Knock/Combustion Vibration Sensor C Circuit Low | Fuel Metering | Medium |
| P032D | Knock/Combustion Vibration Sensor C Circuit High | Fuel Metering | Medium |
| P032E | Knock/Combustion Vibration Sensor C Circuit Intermittent | Fuel Metering | Medium |
| P032F | Combustion Engine Producing Insufficent Torque | Fuel Metering | Medium |
| P033A | Knock/Combustion Vibration Sensor D Circuit | Fuel Metering | Medium |
| P033B | Knock/Combustion Vibration Sensor D Circuit Range/Performance | Fuel Metering | Medium |
| P033C | Knock/Combustion Vibration Sensor D Circuit Low | Fuel Metering | Medium |
| P033D | Knock/Combustion Vibration Sensor D Circuit High | Fuel Metering | Medium |
| P033E | Knock/Combustion Vibration Sensor D Circuit Intermittent | Fuel Metering | Medium |
| P034C | Ion Sense System Performance | Fuel Metering | Medium |
| P037A | Glow Plug/Heater Indicator Control Circuit Low | Fuel Metering | Medium |
| P037B | Glow Plug/Heater Indicator Control Circuit High | Fuel Metering | Medium |
| P037D | Glow Plug Sense Circuit | Fuel Metering | Medium |
| P037E | Glow Plug Sense Circuit Low | Fuel Metering | Medium |
| P037F | Glow Plug Sense Circuit High | Fuel Metering | Medium |
| P039A | Cylinder 1 Pressure Too Low | Fuel Metering | Medium |
| P039B | Cylinder 1 Pressure Too High | Fuel Metering | Medium |
| P039C | Cylinder 1 Pressure Variation Low | Fuel Metering | Medium |
| P039D | Cylinder 1 Pressure Variation High | Fuel Metering | Medium |
| P039E | Cylinder 1 Combustion Performance | Fuel Metering | Medium |
| P039F | Cylinder 2 Pressure Sensor Circuit | Fuel Metering | Medium |
| P03A0 | Cylinder 2 Pressure Sensor Circuit Range/Performance | Fuel Metering | Medium |
| P03A1 | Cylinder 2 Pressure Sensor Circuit Low | Fuel Metering | Medium |
| P03A2 | Cylinder 2 Pressure Sensor Circuit High | Fuel Metering | Medium |
| P03A3 | Cylinder 2 Pressure Sensor Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P03A4 | Cylinder 2 Pressure Too Low | Fuel Metering | Medium |
| P03A5 | Cylinder 2 Pressure Too High | Fuel Metering | Medium |
| P03A6 | Cylinder 2 Pressure Variation Low | Fuel Metering | Medium |
| P03A7 | Cylinder 2 Pressure Variation High | Fuel Metering | Medium |
| P03A8 | Cylinder 2 Combustion Performance | Fuel Metering | Medium |
| P03A9 | Cylinder 3 Pressure Sensor Circuit | Fuel Metering | Medium |
| P03AA | Cylinder 3 Pressure Sensor Circuit Range/Performance | Fuel Metering | Medium |
| P03AB | Cylinder 3 Pressure Sensor Circuit Low | Fuel Metering | Medium |
| P03AC | Cylinder 3 Pressure Sensor Circuit High | Fuel Metering | Medium |
| P03AD | Cylinder 3 Pressure Sensor Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P03AE | Cylinder 3 Pressure Too Low | Fuel Metering | Medium |
| P03AF | Cylinder 3 Pressure Too High | Fuel Metering | Medium |
| P03B0 | Cylinder 3 Pressure Variation Low | Fuel Metering | Medium |
| P03B1 | Cylinder 3 Pressure Variation High | Fuel Metering | Medium |
| P03B2 | Cylinder 3 Combustion Performance | Fuel Metering | Medium |
| P03B3 | Cylinder 4 Pressure Sensor Circuit | Fuel Metering | Medium |
| P03B4 | Cylinder 4 Pressure Sensor 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.