OBD2 Fault Code Library

Free lookup for thousands of OBD2 trouble codes: filter by family, read short meanings, and open deeper articles. Desktop ELM327 scanner with live data and AI guidance.

OBD2 symptoms

Look up diagnostic trouble codes by what the car is doing: misfire, overheating, rough idle, a check engine light, and other common symptoms.

• Engine misfire
• Engine overheating
• Rough idle
• Check engine light
• Poor fuel economy
• Hard starting
• Engine stalling
• Catalytic converter efficiency
• Oxygen sensor fault
• EVAP leak
• Thermostat not reaching temperature
• Lean air-fuel mixture
• Rich air-fuel mixture
• EGR flow fault
• Engine knock
• Charging system
• Throttle position
• Mass airflow sensor
• Turbo underboost
• Coolant temperature sensor
• Transmission fault

• P0A69 — P0A69 — Drive Motor "B" Phase V Current. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: blown fuse feeding the circuit, faulty sensor or actuator of the affected circuit, control module driver fault.
• P0A6A — Drive Motor "B" Phase V Current Low (P0A6A): a powertrain (engine/transmission) fault affecting the sensor and actuator circuits. The car is usually drivable while you plan the repair. Most often caused by open or shorted wiring in the circuit, corroded, loose or damaged connector, poor ground connection.
• P0A6B — OBD2 code P0A6B flags a problem with the sensor and actuator circuits (drive motor "B" phase v current high). The car is usually drivable while you plan the repair. Common culprits: open or shorted wiring in the circuit, corroded, loose or damaged connector, blown fuse feeding the circuit.
• P0A6C — P0A6C — Drive Motor "B" Phase W Current. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: control module driver fault, blown fuse feeding the circuit, corroded, loose or damaged connector.
• P0A6D — Drive Motor "B" Phase W Current Low (P0A6D): a powertrain (engine/transmission) fault affecting the sensor and actuator circuits. The car is usually drivable while you plan the repair. Most often caused by control module driver fault, corroded, loose or damaged connector, blown fuse feeding the circuit.
• P0A6E — Drive Motor "B" Phase W Current High (P0A6E): a powertrain (engine/transmission) fault affecting the sensor and actuator circuits. The car is usually drivable while you plan the repair. Most often caused by control module driver fault, blown fuse feeding the circuit, open or shorted wiring in the circuit.
• P0A6F — P0A6F — Generator Phase U Current. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: open or shorted wiring in the circuit, faulty sensor or actuator of the affected circuit, control module driver fault.
• P0A70 — OBD2 code P0A70 flags a problem with the sensor and actuator circuits (generator phase u current low). The car is usually drivable while you plan the repair. Common culprits: control module driver fault, faulty sensor or actuator of the affected circuit, corroded, loose or damaged connector.
• P0A71 — Generator Phase U Current High (P0A71): a powertrain (engine/transmission) fault affecting the sensor and actuator circuits. The car is usually drivable while you plan the repair. Most often caused by control module driver fault, blown fuse feeding the circuit, corroded, loose or damaged connector.
• P0A72 — OBD2 code P0A72 flags a problem with the sensor and actuator circuits (generator phase v current). The car is usually drivable while you plan the repair. Common culprits: control module driver fault, corroded, loose or damaged connector, open or shorted wiring in the circuit.
• P0A73 — OBD2 code P0A73 flags a problem with the sensor and actuator circuits (generator phase v current low). The car is usually drivable while you plan the repair. Common culprits: open or shorted wiring in the circuit, faulty sensor or actuator of the affected circuit, blown fuse feeding the circuit.
• P0A74 — Generator Phase V Current High (P0A74): a powertrain (engine/transmission) fault affecting the sensor and actuator circuits. The car is usually drivable while you plan the repair. Most often caused by open or shorted wiring in the circuit, blown fuse feeding the circuit, control module driver fault.
• P0A75 — P0A75 — Generator Phase W Current. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: blown fuse feeding the circuit, open or shorted wiring in the circuit, control module driver fault.
• P0A76 — P0A76 — Generator Phase W Current Low. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: poor ground connection, blown fuse feeding the circuit, open or shorted wiring in the circuit.
• P0A77 — OBD2 code P0A77 flags a problem with the sensor and actuator circuits (generator phase w current high). The car is usually drivable while you plan the repair. Common culprits: open or shorted wiring in the circuit, faulty sensor or actuator of the affected circuit, control module driver fault.
• P0A78 — P0A78 — Drive Motor "A" Inverter Performance. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: faulty sensor or actuator of the affected circuit, corroded, loose or damaged connector, open or shorted wiring in the circuit.
• P0A79 — P0A79 — Drive Motor "B" Inverter Performance. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: faulty sensor or actuator of the affected circuit, poor ground connection, corroded, loose or damaged connector.
• P0A7A — P0A7A — Generator Inverter Performance. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: faulty sensor or actuator of the affected circuit, control module driver fault, blown fuse feeding the circuit.
• P0A7B — OBD2 code P0A7B flags a problem with the sensor and actuator circuits (battery energy control module requested MIL illumination). The car is usually drivable while you plan the repair. Common culprits: blown fuse feeding the circuit, control module driver fault, corroded, loose or damaged connector.
• P0A7C — OBD2 code P0A7C flags a problem with the sensor and actuator circuits (motor electronics over temperature). The car is usually drivable while you plan the repair. Common culprits: open or shorted wiring in the circuit, poor ground connection, corroded, loose or damaged connector.
• P0A7D — Hybrid Battery Pack State of Charge Low (P0A7D): a powertrain (engine/transmission) fault affecting the sensor and actuator circuits. The car is usually drivable while you plan the repair. Most often caused by blown fuse feeding the circuit, poor ground connection, open or shorted wiring in the circuit.
• P0A7E — P0A7E — Hybrid Battery Pack Over Temperature. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: corroded, loose or damaged connector, control module driver fault, blown fuse feeding the circuit.
• P0A7F — P0A7F — Hybrid Battery Pack Deterioration. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: open or shorted wiring in the circuit, faulty sensor or actuator of the affected circuit, blown fuse feeding the circuit.
• P0A80 — Replace Hybrid Battery Pack (P0A80): a powertrain (engine/transmission) fault affecting the sensor and actuator circuits. The car is usually drivable while you plan the repair. Most often caused by faulty sensor or actuator of the affected circuit, control module driver fault, open or shorted wiring in the circuit.