Fuel System Codes
5,039 OBD-II diagnostic trouble codes in this category.
Showing page 44 of 51 (5,039 codes total)
| Code | Description | Subsystem | Severity |
|---|---|---|---|
| P2AC8 | Charge Air Cooler Coolant Temperature Sensor B Circuit Range/Performance | Fuel Metering | Medium |
| P2AC9 | Charge Air Cooler Coolant Temperature Sensor B Circuit Low | Fuel Metering | Medium |
| P2ACA | Charge Air Cooler Coolant Temperature Sensor B Circuit High | Fuel Metering | Medium |
| P2ACB | Charge Air Cooler Coolant Temperature Sensor B Intermittent/Erratic | Fuel Metering | Medium |
| P2ACC | Reductant Temperature Sensor B Circuit | Fuel Metering | Medium |
| P2ACD | Reductant Temperature Sensor B Circuit Range/Performance | Fuel Metering | Medium |
| P2ACE | Reductant Temperature Sensor B Circuit Low | Fuel Metering | Medium |
| P2ACF | Reductant Temperature Sensor B Circuit High | Fuel Metering | Medium |
| P2AD0 | Reductant Temperature Sensor B Circuit Intermittent | Fuel Metering | Medium |
| P2AD1 | Throttle/Pedal Position Sensor/Switch C/G Voltage Correlation | Fuel Metering | Medium |
| P2AD2 | Throttle/Pedal Position Sensor/Switch B/G Voltage Correlation | Fuel Metering | Medium |
| P2AD3 | Throttle/Pedal Position Sensor/Switch A/G Voltage Correlation | Fuel Metering | Medium |
| P2AD4 | Intermediate System Voltage Low | Fuel Metering | Medium |
| P2AD5 | Intermediate System Voltage High | Fuel Metering | Medium |
| P2AD6 | Reductant Pump Motor Position Sensor Circuit | Fuel Metering | Medium |
| P2AD7 | Reductant Pump Motor Position Sensor Circuit Range/Performance | Fuel Metering | Medium |
| P2AD8 | Reductant Pump Motor Position Sensor Circuit Low | Fuel Metering | Medium |
| P2AD9 | Reductant Pump Motor Position Sensor Circuit High | Fuel Metering | Medium |
| P2ADA | Reductant Tank Temperature Sensor B Circuit Range/Performance | Fuel Metering | Medium |
| P2ADB | Reductant Tank Temperature Sensor B Circuit Low | Fuel Metering | Medium |
| P2ADC | Reductant Tank Temperature Sensor B Circuit High | Fuel Metering | Medium |
| P2ADD | Reductant Tank Temperature Sensor B Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P2ADE | Reductant Tank Temperature Sensor B Circuit | Fuel Metering | Medium |
| P2ADF | Intake Air System Leak Bank 2 | Fuel Metering | Medium |
| P2AF2 | Starter Relay C Control Circuit/Open | Fuel Metering | Medium |
| P2AF3 | Starter Relay C Control Circuit Low | Fuel Metering | Medium |
| P2AF4 | Starter Relay C Control Circuit High | Fuel Metering | Medium |
| P2AF5 | Starter Relay C Stuck On | Fuel Metering | Medium |
| P2AF6 | Starter Relay C Stuck Off | Fuel Metering | Medium |
| P2AF7 | Starter Relay D Control Circuit/Open | Fuel Metering | Medium |
| P2AF8 | Starter Relay D Control Circuit Low | Fuel Metering | Medium |
| P2AF9 | Starter Relay D Control Circuit High | Fuel Metering | Medium |
| P2AFA | Starter Relay D Stuck On | Fuel Metering | Medium |
| P2AFB | Starter Relay D Stuck Off | Fuel Metering | Medium |
| P2AFC | Engine Coolant Temperature Sensor 4 Circuit | Fuel Metering | Medium |
| P2AFD | Engine Coolant Temperature Sensor 4 Circuit Range/Performance | Fuel Metering | Medium |
| P2AFE | Engine Coolant Temperature Sensor 4 Circuit Low | Fuel Metering | Medium |
| P2AFF | Engine Coolant Temperature Sensor 4 Circuit High | Fuel Metering | Medium |
| P2B00 | Cylinder 1 Injection Pulse Performance | Fuel Metering | Medium |
| P2B01 | Cylinder 2 Injection Pulse Performance | Fuel Metering | Medium |
| P2B02 | Cylinder 3 Injection Pulse Performance | Fuel Metering | Medium |
| P2B03 | Cylinder 4 Injection Pulse Performance | Fuel Metering | Medium |
| P2B04 | Cylinder 5 Injection Pulse Performance | Fuel Metering | Medium |
| P2B05 | Cylinder 6 Injection Pulse Performance | Fuel Metering | Medium |
| P2B06 | Cylinder 7 Injection Pulse Performance | Fuel Metering | Medium |
| P2B07 | Cylinder 8 Injection Pulse Performance | Fuel Metering | Medium |
| P2B08 | Cold Start Cylinder 1 Injection Pulse Performance | Fuel Metering | Medium |
| P2B09 | Cold Start Cylinder 2 Injection Pulse Performance | Fuel Metering | Medium |
| P2B0A | Cold Start Cylinder 3 Injection Pulse Performance | Fuel Metering | Medium |
| P2B0B | Cold Start Cylinder 4 Injection Pulse Performance | Fuel Metering | Medium |
| P2B0C | Cold Start Cylinder 5 Injection Pulse Performance | Fuel Metering | Medium |
| P2B0D | Cold Start Cylinder 6 Injection Pulse Performance | Fuel Metering | Medium |
| P2B0E | Cold Start Cylinder 7 Injection Pulse Performance | Fuel Metering | Medium |
| P2B0F | Cold Start Cylinder 8 Injection Pulse Performance | Fuel Metering | Medium |
| P2B10 | Cylinder 1 Injection Pulse Offset Not Learned | Fuel Metering | Medium |
| P2B11 | Cylinder 1 Injection Pulse Offset Exceeded Learning Limit | Fuel Metering | Medium |
| P2B12 | Cylinder 2 Injection Pulse Offset Not Learned | Fuel Metering | Medium |
| P2B13 | Cylinder 2 Injection Pulse Offset Exceeded Learning Limit | Fuel Metering | Medium |
| P2B14 | Cylinder 3 Injection Pulse Offset Not Learned | Fuel Metering | Medium |
| P2B15 | Cylinder 3 Injection Pulse Offset Exceeded Learning Limit | Fuel Metering | Medium |
| P2B16 | Cylinder 4 Injection Pulse Offset Not Learned | Fuel Metering | Medium |
| P2B17 | Cylinder 4 Injection Pulse Offset Exceeded Learning Limit | Fuel Metering | Medium |
| P2B18 | Cylinder 5 Injection Pulse Offset Not Learned | Fuel Metering | Medium |
| P2B19 | Cylinder 5 Injection Pulse Offset Exceeded Learning Limit | Fuel Metering | Medium |
| P2B1A | Cylinder 6 Injection Pulse Offset Not Learned | Fuel Metering | Medium |
| P2B1B | Cylinder 6 Injection Pulse Offset Exceeded Learning Limit | Fuel Metering | Medium |
| P2B1C | Cylinder 7 Injection Pulse Offset Not Learned | Fuel Metering | Medium |
| P2B1D | Cylinder 7 Injection Pulse Offset Exceeded Learning Limit | Fuel Metering | Medium |
| P2B1E | Cylinder 8 Injection Pulse Offset Not Learned | Fuel Metering | Medium |
| P2B1F | Cylinder 8 Injection Pulse Offset Exceeded Learning Limit | Fuel Metering | Medium |
| P2B20 | Hybrid/EV Electronics Coolant Temperature Sensor B Circuit | Fuel Metering | Medium |
| P2B21 | Hybrid/EV Electronics Coolant Temperature Sensor B Circuit Range/Perfomance | Fuel Metering | Medium |
| P2B22 | Hybrid/EV Electronics Coolant Temperature Sensor B Circuit Low | Fuel Metering | Medium |
| P2B23 | Hybrid/EV Electronics Coolant Temperature Sensor B Circuit High | Fuel Metering | Medium |
| P2B24 | Hybrid/EV Electronics Coolant Temperature Sensor C Circuit | Fuel Metering | Medium |
| P2B25 | Hybrid/EV Electronics Coolant Temperature Sensor C Circuit Range/Perfomance | Fuel Metering | Medium |
| P2B26 | Hybrid/EV Electronics Coolant Temperature Sensor C Circuit Low | Fuel Metering | Medium |
| P2B27 | Hybrid/EV Electronics Coolant Temperature Sensor C Circuit High | Fuel Metering | Medium |
| P2B28 | Hybrid/EV Battery Pack Coolant Pump A Performance | Fuel Metering | Medium |
| P2B29 | Hybrid/EV Battery Pack Coolant Pump A Overspeed - Dry Run | Fuel Metering | Medium |
| P2B2A | Hybrid/EV Electronics Coolant Pump A Overspeed - Dry Run | Fuel Metering | Medium |
| P2B2B | Engine Coolant Temperature Sensor 5 Circuit | Fuel Metering | Medium |
| P2B2C | Engine Coolant Temperature Sensor 5 Circuit Range/Performance | Fuel Metering | Medium |
| P2B2D | Engine Coolant Temperature Sensor 5 Circuit Low | Fuel Metering | Medium |
| P2B2E | Engine Coolant Temperature Sensor 5 Circuit High | Fuel Metering | Medium |
| P2B2F | Fan 1 Performance/Stuck Off | Fuel Metering | Medium |
| P2B30 | Fan 1 Stuck On | Fuel Metering | Medium |
| P2B31 | Fan 2 Performance/Stuck Off | Fuel Metering | Medium |
| P2B32 | Fan 2 Stuck On | Fuel Metering | Medium |
| P2B58 | Engine Coolant Flow Control Valve Motor Current High | Fuel Metering | Medium |
| P2B59 | Engine Coolant Flow Control Valve Control Circuit/Open | Fuel Metering | Medium |
| P2B5A | Engine Coolant Flow Control Valve Control Circuit Low | Fuel Metering | Medium |
| P2B5B | Engine Coolant Flow Control Valve Control Circuit High | Fuel Metering | Medium |
| P2B5C | Engine Coolant Flow Control Valve Supply Circuit Low | Fuel Metering | Medium |
| P2B5D | Engine Coolant Flow Control Valve Position Sensor Circuit | Fuel Metering | Medium |
| P2B5E | Engine Coolant Flow Control Valve Position Sensor Circuit Low | Fuel Metering | Medium |
| P2B5F | Engine Coolant Flow Control Valve Position Sensor Circuit High | Fuel Metering | Medium |
| P2B60 | Engine Coolant Flow Control Valve Position Sensor Circuit Range/Performance | Fuel Metering | Medium |
| P2B61 | Engine Coolant Flow Control Valve Stuck Closed | Fuel Metering | Medium |
| P2B62 | Coolant Pump B Supply Voltage Circuit | 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.