Fuel System Codes
5,039 OBD-II diagnostic trouble codes in this category.
Showing page 6 of 51 (5,039 codes total)
| Code | Description | Subsystem | Severity |
|---|---|---|---|
| P03B5 | Cylinder 4 Pressure Sensor Circuit Low | Fuel Metering | Medium |
| P03B6 | Cylinder 4 Pressure Sensor Circuit High | Fuel Metering | Medium |
| P03B7 | Cylinder 4 Pressure Sensor Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P03B8 | Cylinder 4 Pressure Too Low | Fuel Metering | Medium |
| P03B9 | Cylinder 4 Pressure Too High | Fuel Metering | Medium |
| P03BA | Cylinder 4 Pressure Variation Low | Fuel Metering | Medium |
| P03BB | Cylinder 4 Pressure Variation High | Fuel Metering | Medium |
| P03BC | Cylinder 4 Combustion Performance | Fuel Metering | Medium |
| P03BD | Cylinder 5 Pressure Sensor Circuit | Fuel Metering | Medium |
| P03BE | Cylinder 5 Pressure Sensor Circuit Range/Performance | Fuel Metering | Medium |
| P03BF | Cylinder 5 Pressure Sensor Circuit Low | Fuel Metering | Medium |
| P03C0 | Cylinder 5 Pressure Sensor Circuit High | Fuel Metering | Medium |
| P03C1 | Cylinder 5 Pressure Sensor Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P03C2 | Cylinder 5 Pressure Too Low | Fuel Metering | Medium |
| P03C3 | Cylinder 5 Pressure Too High | Fuel Metering | Medium |
| P03C4 | Cylinder 5 Pressure Variation Low | Fuel Metering | Medium |
| P03C5 | Cylinder 5 Pressure Variation High | Fuel Metering | Medium |
| P03C6 | Cylinder 5 Combustion Performance | Fuel Metering | Medium |
| P03C7 | Cylinder 6 Pressure Sensor Circuit | Fuel Metering | Medium |
| P03C8 | Cylinder 6 Pressure Sensor Circuit Range/Performance | Fuel Metering | Medium |
| P03C9 | Cylinder 6 Pressure Sensor Circuit Low | Fuel Metering | Medium |
| P03CA | Cylinder 6 Pressure Sensor Circuit High | Fuel Metering | Medium |
| P03CB | Cylinder 6 Pressure Sensor Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P03CC | Cylinder 6 Pressure Too Low | Fuel Metering | Medium |
| P03CD | Cylinder 6 Pressure Too High | Fuel Metering | Medium |
| P03CE | Cylinder 6 Pressure Variation Low | Fuel Metering | Medium |
| P03CF | Cylinder 6 Pressure Variation High | Fuel Metering | Medium |
| P03D0 | Cylinder 6 Combustion Performance | Fuel Metering | Medium |
| P03D1 | Cylinder 7 Pressure Sensor Circuit | Fuel Metering | Medium |
| P03D2 | Cylinder 7 Pressure Sensor Circuit Range/Performance | Fuel Metering | Medium |
| P03D3 | Cylinder 7 Pressure Sensor Circuit Low | Fuel Metering | Medium |
| P03D4 | Cylinder 7 Pressure Sensor Circuit High | Fuel Metering | Medium |
| P03D5 | Cylinder 7 Pressure Sensor Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P03D6 | Cylinder 7 Pressure Too Low | Fuel Metering | Medium |
| P03D7 | Cylinder 7 Pressure Too High | Fuel Metering | Medium |
| P03D8 | Cylinder 7 Pressure Variation Low | Fuel Metering | Medium |
| P03D9 | Cylinder 7 Pressure Variation High | Fuel Metering | Medium |
| P03DA | Cylinder 7 Combustion Performance | Fuel Metering | Medium |
| P03DB | Cylinder 8 Pressure Sensor Circuit | Fuel Metering | Medium |
| P03DC | Cylinder 8 Pressure Sensor Circuit Range/Performance | Fuel Metering | Medium |
| P03DD | Cylinder 8 Pressure Sensor Circuit Low | Fuel Metering | Medium |
| P03DE | Cylinder 8 Pressure Sensor Circuit High | Fuel Metering | Medium |
| P03DF | Cylinder 8 Pressure Sensor Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P03E0 | Cylinder 8 Pressure Too Low | Fuel Metering | Medium |
| P03E1 | Cylinder 8 Pressure Too High | Fuel Metering | Medium |
| P03E3 | Cylinder 8 Pressure Variation High | Fuel System | Medium |
| P040A | EGR Temperature Sensor A Circuit | Fuel Metering | Medium |
| P040B | EGR Temperature Sensor A Circuit Range/Performance | Fuel Metering | Medium |
| P040C | EGR Temperature Sensor A Circuit Low | Fuel Metering | Medium |
| P040D | EGR Temperature Sensor A Circuit High | Fuel Metering | Medium |
| P040E | EGR Temperature Sensor A Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P040F | EGR Temperature Sensor A/B Correlation | Fuel Metering | Medium |
| P041A | EGR Temperature Sensor B Circuit | Fuel Metering | Medium |
| P041B | EGR Temperature Sensor B Circuit Range/Performance | Fuel Metering | Medium |
| P041C | EGR Temperature Sensor B Circuit Low | Fuel Metering | Medium |
| P041D | EGR Temperature Sensor B Circuit High | Fuel Metering | Medium |
| P041E | EGR Temperature Sensor B Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P041F | AIR System Switching Valve A Circuit Low | Fuel Metering | Medium |
| P042A | Catalyst Temperature Sensor Circuit Bank 1 Sensor 2 | Fuel Metering | Medium |
| P042B | Catalyst Temperature Sensor Circuit Range/Performance Bank 1 Sensor 2 | Fuel Metering | Medium |
| P042C | Catalyst Temperature Sensor Circuit Low Bank 1 Sensor 2 | Fuel Metering | Medium |
| P042D | Catalyst Temperature Sensor Circuit High Bank 1 Sensor 2 | Fuel Metering | Medium |
| P042E | EGR A Control Stuck Open | Fuel Metering | Medium |
| P042F | EGR A Control Stuck Closed | Fuel Metering | Medium |
| P043A | Catalyst Temperature Sensor Circuit Bank 2 Sensor 2 | Fuel Metering | Medium |
| P043B | Catalyst Temperature Sensor Circuit Range/Performance Bank 2 Sensor 2 | Fuel Metering | Medium |
| P043C | Catalyst Temperature Sensor Circuit Low Bank 2 Sensor 2 | Fuel Metering | Medium |
| P043D | Catalyst Temperature Sensor Circuit High Bank 2 Sensor 2 | Fuel Metering | Medium |
| P043E | EVAP System Leak Detection Reference Orifice Low Flow | Fuel Metering | Medium |
| P043F | EVAP System Leak Detection Reference Orifice High Flow | Fuel Metering | Medium |
| P044A | EGR Sensor C Circuit | Fuel Metering | Medium |
| P044B | EGR Sensor C Circuit Range/Performance | Fuel Metering | Medium |
| P044C | EGR Sensor C Circuit Low | Fuel Metering | Medium |
| P044D | EGR Sensor C Circuit High | Fuel Metering | Medium |
| P044E | EGR Sensor C Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P044F | AIR System Switching Valve A Circuit High | Fuel Metering | Medium |
| P045A | EGR B Control Circuit | Fuel Metering | Medium |
| P045B | EGR B Control Circuit Range/Performance | Fuel Metering | Medium |
| P045C | EGR B Control Circuit Low | Fuel Metering | Medium |
| P045D | EGR B Control Circuit High | Fuel Metering | Medium |
| P045E | EGR B Control Stuck Open | Fuel Metering | Medium |
| P045F | EGR B Control Stuck Closed | Fuel Metering | Medium |
| P0460 | Fuel Level Sensor Circuit | Fuel Level | Medium |
| P0461 | Fuel Level Sensor Circuit Range/Performance | Fuel Level | Medium |
| P0462 | Fuel Level Sensor Circuit Low Input | Fuel Level | Medium |
| P0463 | Fuel Level Sensor Circuit High Input | Fuel Level | Medium |
| P0464 | Fuel Level Sensor Circuit Intermittent | Fuel Level | Low |
| P046A | Catalyst Temperature Sensor 1/2 Correlation Bank 1 | Fuel Metering | Medium |
| P046B | Catalyst Temperature Sensor 1/2 Correlation Bank 2 | Fuel Metering | Medium |
| P046C | EGR Sensor A Circuit Range/Performance | Fuel Metering | Medium |
| P046D | EGR Sensor A Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P046E | EGR Sensor B Circuit Range/Performance | Fuel Metering | Medium |
| P046F | EGR Sensor B Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P047A | Exhaust Pressure Sensor B Circuit | Fuel Metering | Medium |
| P047B | Exhaust Pressure Sensor B Circuit Range/Performance | Fuel Metering | Medium |
| P047C | Exhaust Pressure Sensor B Circuit Low | Fuel Metering | Medium |
| P047D | Exhaust Pressure Sensor B Circuit High | Fuel Metering | Medium |
| P047E | Exhaust Pressure Sensor B Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P047F | Exhaust Pressure Control Valve A Stuck Open | Fuel Metering | Medium |
| P048A | Exhaust Pressure Control Valve A Stuck Closed | 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.