Fuel System Codes
5,039 OBD-II diagnostic trouble codes in this category.
Showing page 15 of 51 (5,039 codes total)
| Code | Description | Subsystem | Severity |
|---|---|---|---|
| P0A76 | Generator Phase W Current Low | Fuel Metering | Medium |
| P0A77 | Generator Phase W Current High | Fuel Metering | Medium |
| P0A78 | Drive Motor A Inverter Performance | Fuel Metering | Medium |
| P0A79 | Drive Motor B Inverter Performance | Fuel Metering | Medium |
| P0A7A | Generator Inverter Performance | Fuel Metering | Medium |
| P0A7B | Battery Energy Control Module Requested MIL Illumination | Fuel Metering | Medium |
| P0A7C | Motor Electronics Over Temperature | Fuel Metering | Medium |
| P0A7D | Hybrid/EV Battery Pack State of Charge Low | Fuel Metering | Medium |
| P0A7E | Hybrid/EV Battery Pack A Over Temperature | Fuel Metering | Medium |
| P0A7F | Hybrid/EV Battery Pack A Deterioration | Fuel Metering | Medium |
| P0A80 | Replace Hybrid/EV Battery Pack | Fuel Metering | Medium |
| P0A81 | Hybrid/EV Battery Pack Cooling Fan 1 Control Circuit/Open | Fuel Metering | Medium |
| P0A82 | Hybrid/EV Battery Pack Cooling Fan 1 Performance/Stuck Off | Fuel Metering | Medium |
| P0A83 | Hybrid/EV Battery Pack Cooling Fan 1 Stuck On | Fuel Metering | Medium |
| P0A84 | Hybrid/EV Battery Pack Cooling Fan 1 Control Circuit Low | Fuel Metering | Medium |
| P0A85 | Hybrid/EV Battery Pack Cooling Fan 1 Control Circuit High | Fuel Metering | Medium |
| P0A86 | 14 Volt Power Module Current Sensor A Circuit | Fuel Metering | Medium |
| P0A87 | 14 Volt Power Module Current Sensor A Circuit Range/Performance | Fuel Metering | Medium |
| P0A88 | 14 Volt Power Module Current Sensor A Circuit Low | Fuel Metering | Medium |
| P0A89 | 14 Volt Power Module Current Sensor A Circuit High | Fuel Metering | Medium |
| P0A8A | 14 Volt Power Module Current Sensor A Circuit Intermittent | Fuel Metering | Medium |
| P0A8B | 14 Volt Power Module System Voltage | Fuel Metering | Medium |
| P0A8C | 14 Volt Power Module System Voltage Unstable | Fuel Metering | Medium |
| P0A8D | 14 Volt Power Module System Voltage Low | Fuel Metering | Medium |
| P0A8E | 14 Volt Power Module System Voltage High | Fuel Metering | Medium |
| P0A8F | 14 Volt Power Module System Performance | Fuel Metering | Medium |
| P0A90 | Drive Motor A Performance | Fuel Metering | Medium |
| P0A91 | Drive Motor B Performance | Fuel Metering | Medium |
| P0A92 | Hybrid Generator Performance | Fuel Metering | Medium |
| P0A93 | Inverter A Cooling System Performance | Fuel Metering | Medium |
| P0A94 | DC/DC Converter A Performance | Fuel Metering | Medium |
| P0A95 | High Voltage Fuse A | Fuel Metering | Medium |
| P0A96 | Hybrid/EV Battery Pack Cooling Fan 2 Control Circuit/Open | Fuel Metering | Medium |
| P0A97 | Hybrid/EV Battery Pack Cooling Fan 2 Performance/Stuck Off | Fuel Metering | Medium |
| P0A98 | Hybrid/EV Battery Pack Cooling Fan 2 Stuck On | Fuel Metering | Medium |
| P0A99 | Hybrid/EV Battery Pack Cooling Fan 2 Control Circuit Low | Fuel Metering | Medium |
| P0A9A | Hybrid/EV Battery Pack Cooling Fan 2 Control Circuit High | Fuel Metering | Medium |
| P0A9B | Hybrid/EV Battery Temperature Sensor A Circuit | Fuel Metering | Medium |
| P0A9C | Hybrid/EV Battery Temperature Sensor A Circuit Range/Performance | Fuel Metering | Medium |
| P0A9D | Hybrid/EV Battery Temperature Sensor A Circuit Low | Fuel Metering | Medium |
| P0A9E | Hybrid/EV Battery Temperature Sensor A Circuit High | Fuel Metering | Medium |
| P0A9F | Hybrid/EV Battery Temperature Sensor A Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P0AA0 | Hybrid/EV Battery Positive Contactor Circuit | Fuel Metering | Medium |
| P0AA1 | Hybrid/EV Battery Positive Contactor Circuit Stuck Closed | Fuel Metering | Medium |
| P0AA2 | Hybrid/EV Battery Positive Contactor Circuit Stuck Open | Fuel Metering | Medium |
| P0AA3 | Hybrid/EV Battery Negative Contactor Circuit | Fuel Metering | Medium |
| P0AA4 | Hybrid/EV Battery Negative Contactor Circuit Stuck Closed | Fuel Metering | Medium |
| P0AA5 | Hybrid/EV Battery Negative Contactor Circuit Stuck Open | Fuel Metering | Medium |
| P0AA6 | Hybrid/EV Battery Voltage System Isolation Fault | Fuel Metering | Medium |
| P0AA7 | Hybrid/EV Battery Voltage Isolation Sensor Circuit | Fuel Metering | Medium |
| P0AA8 | Hybrid/EV Battery Voltage Isolation Sensor Circuit Range/Performance | Fuel Metering | Medium |
| P0AA9 | Hybrid/EV Battery Voltage Isolation Sensor Circuit Low | Fuel Metering | Medium |
| P0AAA | Hybrid/EV Battery Voltage Isolation Sensor Circuit High | Fuel Metering | Medium |
| P0AAB | Hybrid/EV Battery Voltage Isolation Sensor Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P0AAC | Hybrid/EV Battery Pack Air Temperature Sensor A Circuit | Fuel Metering | Medium |
| P0AAD | Hybrid/EV Battery Pack Air Temperature Sensor A Circuit Range/Performance | Fuel Metering | Medium |
| P0AAE | Hybrid/EV Battery Pack Air Temperature Sensor A Circuit Low | Fuel Metering | Medium |
| P0AAF | Hybrid/EV Battery Pack Air Temperature Sensor A Circuit High | Fuel Metering | Medium |
| P0AB0 | Hybrid/EV Battery Pack Air Temperature Sensor A Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P0AB1 | Hybrid/EV Battery Pack Air Temperature Sensor B Circuit | Fuel Metering | Medium |
| P0AB2 | Hybrid/EV Battery Pack Air Temperature Sensor B Circuit Range/Performance | Fuel Metering | Medium |
| P0AB3 | Hybrid/EV Battery Pack Air Temperature Sensor B Circuit Low | Fuel Metering | Medium |
| P0AB4 | Hybrid/EV Battery Pack Air Temperature Sensor B Circuit High | Fuel Metering | Medium |
| P0AB5 | Hybrid/EV Battery Pack Air Temperature Sensor B Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P0AB6 | Engine Mount B Control Circuit/Open | Fuel Metering | Medium |
| P0AB7 | Engine Mount B Control Circuit Low | Fuel Metering | Medium |
| P0AB8 | Engine Mount B Control Circuit High | Fuel Metering | Medium |
| P0AB9 | Hybrid/EV System Performance | Fuel Metering | Medium |
| P0ABA | Hybrid/EV Battery Pack Voltage Sense A Circuit | Fuel Metering | Medium |
| P0ABB | Hybrid/EV Battery Pack Voltage Sense A Circuit Range/Performance | Fuel Metering | Medium |
| P0ABC | Hybrid/EV Battery Pack Voltage Sense A Circuit Low | Fuel Metering | Medium |
| P0ABD | Hybrid/EV Battery Pack Voltage Sense A Circuit High | Fuel Metering | Medium |
| P0ABE | Hybrid/EV Battery Pack Voltage Sense A Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P0ABF | Hybrid/EV Battery Pack Current Sensor A Circuit | Fuel Metering | Medium |
| P0AC0 | Hybrid/EV Battery Pack Current Sensor A Circuit Range/Performance | Fuel Metering | Medium |
| P0AC1 | Hybrid/EV Battery Pack Current Sensor A Circuit Low | Fuel Metering | Medium |
| P0AC2 | Hybrid/EV Battery Pack Current Sensor A Circuit High | Fuel Metering | Medium |
| P0AC3 | Hybrid/EV Battery Pack Current Sensor A Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P0AC4 | Hybrid/EV Powertrain Control Module Requested MIL Illumination | Fuel Metering | Medium |
| P0AC5 | Hybrid/EV Battery Temperature Sensor B Circuit | Fuel Metering | Medium |
| P0AC6 | Hybrid/EV Battery Temperature Sensor B Circuit Range/Performance | Fuel Metering | Medium |
| P0AC7 | Hybrid/EV Battery Temperature Sensor B Circuit Low | Fuel Metering | Medium |
| P0AC8 | Hybrid/EV Battery Temperature Sensor B Circuit High | Fuel Metering | Medium |
| P0AC9 | Hybrid/EV Battery Temperature Sensor B Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P0ACA | Hybrid/EV Battery Temperature Sensor C Circuit | Fuel Metering | Medium |
| P0ACB | Hybrid/EV Battery Temperature Sensor C Circuit Range/Performance | Fuel Metering | Medium |
| P0ACC | Hybrid/EV Battery Temperature Sensor C Circuit Low | Fuel Metering | Medium |
| P0ACD | Hybrid/EV Battery Temperature Sensor C Circuit High | Fuel Metering | Medium |
| P0ACE | Hybrid/EV Battery Temperature Sensor C Circuit Intermittent/Erratic | Fuel Metering | Medium |
| P0ACF | Hybrid/EV Battery Pack Cooling Fan 3 Control Circuit/Open | Fuel Metering | Medium |
| P0AD0 | Hybrid/EV Battery Pack Cooling Fan 3 Performance/Stuck Off | Fuel Metering | Medium |
| P0AD1 | Hybrid/EV Battery Pack Cooling Fan 3 Stuck On | Fuel Metering | Medium |
| P0AD2 | Hybrid/EV Battery Pack Cooling Fan 3 Control Circuit Low | Fuel Metering | Medium |
| P0AD3 | Hybrid/EV Battery Pack Cooling Fan 3 Control Circuit High | Fuel Metering | Medium |
| P0AD4 | Hybrid/EV Battery Pack Air Flow System Insufficient Air Flow | Fuel Metering | Medium |
| P0AD5 | Hybrid/EV Battery Pack Air Flow Valve A Control Circuit/Open | Fuel Metering | Medium |
| P0AD6 | Hybrid/EV Battery Pack Air Flow Valve A Control Circuit Range/Performance | Fuel Metering | Medium |
| P0AD7 | Hybrid/EV Battery Pack Air Flow Valve A Control Circuit Low | Fuel Metering | Medium |
| P0AD8 | Hybrid/EV Battery Pack Air Flow Valve A Control Circuit High | Fuel Metering | Medium |
| P0AD9 | Hybrid/EV Battery Positive Contactor Control Circuit/Open | 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.