Fuel System Codes
5,039 OBD-II diagnostic trouble codes in this category.
Showing page 45 of 51 (5,039 codes total)
| Code | Description | Subsystem | Severity |
|---|---|---|---|
| P2B63 | Coolant Pump B Stuck/Stalled | Fuel Metering | Medium |
| P2B64 | Coolant Pump B Control Module Overtemperature | Fuel Metering | Medium |
| P2B65 | Coolant Pump B Overspeed/Air in System | Fuel Metering | Medium |
| P2B66 | Coolant Pump D Control Circuit/Open | Fuel Metering | Medium |
| P2B67 | Coolant Pump D Control Circuit Low | Fuel Metering | Medium |
| P2B68 | Coolant Pump D Control Circuit High | Fuel Metering | Medium |
| P2B69 | Coolant Pump D Supply Voltage Circuit | Fuel Metering | Medium |
| P2B6A | Coolant Pump D Stuck/Stalled | Fuel Metering | Medium |
| P2B6B | Coolant Pump D Control Module Overtemperature | Fuel Metering | Medium |
| P2B6C | Coolant Pump D Overspeed/Air in System | Fuel Metering | Medium |
| P2B6D | Engine Coolant Flow Control Valve Position Sensor Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P2B72 | Coolant Heater A Control Circuit/Open | Fuel Metering | Medium |
| P2B73 | Coolant Heater A Control Circuit Low | Fuel Metering | Medium |
| P2B74 | Coolant Heater A Control Circuit High | Fuel Metering | Medium |
| P2B75 | Coolant Heater A Control Circuit Performance | Fuel Metering | Medium |
| P2B76 | Coolant Heater B Control Circuit/Open | Fuel Metering | Medium |
| P2B77 | Coolant Heater B Control Circuit Low | Fuel Metering | Medium |
| P2B78 | Coolant Heater B Control Circuit High | Fuel Metering | Medium |
| P2B79 | Coolant Heater B Control Circuit Performance | Fuel Metering | Medium |
| P2B7A | EVAP System Pressure Sensor/Switch C Circuit | Fuel Metering | Medium |
| P2B7B | EVAP System Pressure Sensor/Switch C Circuit Range/Performance | Fuel Metering | Medium |
| P2B7C | EVAP System Pressure Sensor/Switch C Circuit Low | Fuel Metering | Medium |
| P2B7D | EVAP System Pressure Sensor/Switch C Circuit High | Fuel Metering | Medium |
| P2B7E | EVAP System Pressure Sensor/Switch C Circuit Intermittent | Fuel Metering | Medium |
| P2B81 | Wastegate Position Sensor A Circuit Performance | Fuel Metering | Medium |
| P2B82 | Wastegate Position Sensor B Circuit Performance | Fuel Metering | Medium |
| P2B83 | Charge Air Cooler Coolant Pump A Overspeed/Air In System | Fuel Metering | Medium |
| P2B84 | Charge Air Cooler Coolant Pump A Underspeed | Fuel Metering | Medium |
| P2B85 | Engine Coolant Pump Underspeed | Fuel Metering | Medium |
| P2B86 | Coolant Pump A Overspeed/Air in System | Fuel Metering | Medium |
| P2B87 | Coolant Pump A Underspeed | Fuel Metering | Medium |
| P2B93 | Wastegate Position Sensor A Exceeded Learning Limit | Fuel Metering | Medium |
| P2B94 | Wastegate Position Sensor B Exceeded Learning Limit | Fuel Metering | Medium |
| P2B95 | Cold Start Injection Pulse Performance | Fuel Metering | Medium |
| P2B96 | Injection Pulse Performance | Fuel Metering | Medium |
| P2B97 | Exhaust Pressure Control Valve A Position Exceeded Learning Limit | Fuel Metering | Medium |
| P2B98 | Exhaust Pressure Control Valve A Supply Low | Fuel Metering | Medium |
| P2B99 | Exhaust Pressure Control Valve A Driver Current/Temperature Too High | Fuel Metering | Medium |
| P2B9A | Reductant Quality Sensor Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P2B9B | Vehicle Conditions Incorrect for Particulate Matter Sensor Regeneration | Fuel Metering | Medium |
| P2B9C | Coolant Pump A Stuck/Stalled | Fuel Metering | Medium |
| P2B9D | Coolant Pump A Supply Voltage Circuit | Fuel Metering | Medium |
| P2B9E | Coolant Pump A Control Module Overtemperature | Fuel Metering | Medium |
| P2B9F | Coolant Pump B Underspeed | Fuel Metering | Medium |
| P2BA0 | Coolant Pump C Underspeed | Fuel Metering | Medium |
| P2BA1 | Coolant Pump D Underspeed | Fuel Metering | Medium |
| P2BA2 | Engine Coolant Pump Stuck/Stalled | Fuel Metering | Medium |
| P2BA3 | Starter/Generator Mechanical Performance | Fuel Metering | Medium |
| P2BA4 | Catalyst Feedgas Performance | Fuel Metering | Medium |
| P2BA5 | Particulate Filter Feedgas Performance | Fuel Metering | Medium |
| P2BA6 | NOx Exceedance - SCR NOx Catalyst Performance | Fuel Metering | Medium |
| P2BA7 | NOx Exceedence - Empty Reagent Tank | Fuel Metering | Medium |
| P2BA8 | NOx Exceedence - Interruption of Reagent Dosing Activity | Fuel Metering | Medium |
| P2BA9 | NOx Exceedence - Insufficient Reagent Quality | Fuel Metering | Medium |
| P2BAA | NOx Exceedence - Low Reagent Consumption | Fuel Metering | Medium |
| P2BAB | NOx Exceedence - Incorrect EGR Flow | Fuel Metering | Medium |
| P2BAC | NOx Exceedence - Deactivation of EGR | Fuel Metering | Medium |
| P2BAD | NOx Exceedence - Root Cause Unknown | Fuel Metering | Medium |
| P2BAE | NOx Exceedence - NOx control monitoring system | Fuel Metering | Medium |
| P2BAF | NOx System Driver Inducement Active | Fuel Metering | Medium |
| P2BB0 | Alternative Fuel Consumption Too Low | Fuel Metering | Medium |
| P2BB1 | Alternative Fuel Consumption Too High | Fuel Metering | Medium |
| P2BB2 | Alternative Fuel Tank Empty | Fuel Metering | Medium |
| P2BB3 | Fuel Pump Secondary Circuit Performance | Fuel Metering | Medium |
| P2BB4 | Engine Coolant Temperature Sensor 4 Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P2BB5 | Engine Coolant Temperature Sensor 5 Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P2BB6 | Engine Coolant Temperature Sensor 6 Circuit | Fuel Metering | Medium |
| P2BB7 | Engine Coolant Temperature Sensor 6 Circuit Range/Performance | Fuel Metering | Medium |
| P2BB8 | Engine Coolant Temperature Sensor 6 Circuit Low | Fuel Metering | Medium |
| P2BB9 | Engine Coolant Temperature Sensor 6 Circuit High | Fuel Metering | Medium |
| P2BBA | Engine Coolant Temperature Sensor 6 Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P2BC1 | Charge Air Cooler Coolant Pump A Stuck/Stalled | Fuel Metering | Medium |
| P2BC2 | Charge Air Cooler Coolant Pump A Supply Voltage Circuit | Fuel Metering | Medium |
| P2BC3 | Charge Air Cooler Coolant Pump A Control Module Overtemperature | Fuel Metering | Medium |
| P2BC4 | Battery Charging System Positive Contactor B Circuit | Fuel Metering | Medium |
| P2BC5 | Battery Charging System Positive Contactor B Stuck Closed | Fuel Metering | Medium |
| P2BC6 | Battery Charging System Positive Contactor B Stuck Open | Fuel Metering | Medium |
| P2BC7 | Battery Charging System Positive Contactor B Control Circuit/Open | Fuel Metering | Medium |
| P2BC8 | Battery Charging System Positive Contactor B Control Circuit Range/Performance | Fuel Metering | Medium |
| P2BC9 | Battery Charging System Positive Contactor B Control Circuit Low | Fuel Metering | Medium |
| P2BCA | Battery Charging System Positive Contactor B Control Circuit High | Fuel Metering | Medium |
| P2BCB | Battery Charging System Negative Contactor B Circuit | Fuel Metering | Medium |
| P2BCC | Battery Charging System Negative Contactor B Stuck Closed | Fuel Metering | Medium |
| P2BCD | Battery Charging System Negative Contactor B Stuck Open | Fuel Metering | Medium |
| P2BCE | Battery Charging System Negative Contactor B Control Circuit/Open | Fuel Metering | Medium |
| P2BCF | Battery Charging System Negative Contactor B Control Circuit Range/Performance | Fuel Metering | Medium |
| P2BD0 | Battery Charging System Negative Contactor B Control Circuit Low | Fuel Metering | Medium |
| P2BD1 | Battery Charging System Negative Contactor B Control Circuit High | Fuel Metering | Medium |
| P2BD2 | Exhaust Aftertreatment System A Leak | Fuel Metering | Medium |
| P2BD3 | Exhaust Aftertreatment System B Leak | Fuel Metering | Medium |
| P2BD4 | Motor Electronics Coolant Pump C Control Circuit/Open | Fuel Metering | Medium |
| P2BD5 | Motor Electronics Coolant Pump C Control Circuit Low | Fuel Metering | Medium |
| P2BD6 | Motor Electronics Coolant Pump C Control Circuit High | Fuel Metering | Medium |
| P2BD7 | Motor Electronics Coolant Pump C Control Performance | Fuel Metering | Medium |
| P2BD8 | Motor Electronics Coolant Temperature Sensor B Circuit | Fuel Metering | Medium |
| P2BD9 | Motor Electronics Coolant Temperature Sensor B Circuit Range/Performance | Fuel Metering | Medium |
| P2BDA | Motor Electronics Coolant Temperature Sensor B Circuit Low | Fuel Metering | Medium |
| P2BDB | Motor Electronics Coolant Temperature Sensor B Circuit High | Fuel Metering | Medium |
| P2BDC | Motor Electronics Coolant Temperature Sensor C Circuit | Fuel Metering | Medium |
| P2BDD | Motor Electronics Coolant Temperature Sensor C 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.