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

• P0A51 — OBD2 code P0A51 flags a problem with the sensor and actuator circuits (drive motor "A" current sensor circuit). The car is usually drivable while you plan the repair. Common culprits: poor ground connection, blown fuse feeding the circuit, faulty sensor or actuator of the affected circuit.
• P0A52 — Drive Motor "A" Current Sensor Circuit Range/Performance (P0A52): 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, faulty sensor or actuator of the affected circuit, corroded, loose or damaged connector.
• P0A53 — P0A53 — Drive Motor "A" Current Sensor Circuit Low. 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, poor ground connection, faulty sensor or actuator of the affected circuit.
• P0A54 — Drive Motor "A" Current Sensor Circuit High (P0A54): 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 corroded, loose or damaged connector, poor ground connection, faulty sensor or actuator of the affected circuit.
• P0A55 — Drive Motor "B" Current Sensor Circuit (P0A55): 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 corroded, loose or damaged connector, control module driver fault, poor ground connection.
• P0A56 — Drive Motor "B" Current Sensor Circuit Range/Performance (P0A56): 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, poor ground connection, corroded, loose or damaged connector.
• P0A57 — P0A57 — Drive Motor "B" Current Sensor Circuit Low. 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, open or shorted wiring in the circuit, blown fuse feeding the circuit.
• P0A58 — P0A58 — Drive Motor "B" Current Sensor Circuit High. 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, open or shorted wiring in the circuit, poor ground connection.
• P0A59 — OBD2 code P0A59 flags a problem with the sensor and actuator circuits (generator current sensor circuit). The car is usually drivable while you plan the repair. Common culprits: control module driver fault, corroded, loose or damaged connector, faulty sensor or actuator of the affected circuit.
• P0A5A — Generator Current Sensor Circuit Range/Performance (P0A5A): 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 poor ground connection, blown fuse feeding the circuit, corroded, loose or damaged connector.
• P0A5B — Generator Current Sensor Circuit Low (P0A5B): 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, blown fuse feeding the circuit, open or shorted wiring in the circuit.
• P0A5C — Generator Current Sensor Circuit High (P0A5C): 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, poor ground connection, blown fuse feeding the circuit.
• P0A5D — OBD2 code P0A5D flags a problem with the sensor and actuator circuits (drive motor "A" phase u current). The car is usually drivable while you plan the repair. Common culprits: open or shorted wiring in the circuit, corroded, loose or damaged connector, control module driver fault.
• P0A5E — P0A5E — Drive Motor "A" Phase U Current Low. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: control module driver fault, open or shorted wiring in the circuit, poor ground connection.
• P0A5F — OBD2 code P0A5F flags a problem with the sensor and actuator circuits (drive motor "A" phase u current high). 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.
• P0A60 — Drive Motor "A" Phase V Current (P0A60): 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, faulty sensor or actuator of the affected circuit, control module driver fault.
• P0A61 — P0A61 — Drive Motor "A" Phase V Current Low. 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, control module driver fault, open or shorted wiring in the circuit.
• P0A62 — Drive Motor "A" Phase V Current High (P0A62): 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, poor ground connection, corroded, loose or damaged connector.
• P0A63 — OBD2 code P0A63 flags a problem with the sensor and actuator circuits (drive motor "A" phase w current). The car is usually drivable while you plan the repair. Common culprits: corroded, loose or damaged connector, control module driver fault, open or shorted wiring in the circuit.
• P0A64 — OBD2 code P0A64 flags a problem with the sensor and actuator circuits (drive motor "A" phase w 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, poor ground connection.
• P0A65 — P0A65 — Drive Motor "A" Phase W Current High. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: control module driver fault, faulty sensor or actuator of the affected circuit, open or shorted wiring in the circuit.
• P0A66 — P0A66 — Drive Motor "B" Phase U 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, corroded, loose or damaged connector, faulty sensor or actuator of the affected circuit.
• P0A67 — OBD2 code P0A67 flags a problem with the sensor and actuator circuits (drive motor "B" phase u current low). 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.
• P0A68 — Drive Motor "B" Phase U Current High (P0A68): 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 corroded, loose or damaged connector, open or shorted wiring in the circuit, control module driver fault.