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

• P0C59 — OBD2 code P0C59 flags a problem with the sensor and actuator circuits (drive motor "B" position sensor circuit "A" intermittent/erratic). The car is usually drivable while you plan the repair. Common culprits: blown fuse feeding the circuit, poor ground connection, faulty sensor or actuator of the affected circuit.
• P0C5B — Drive Motor "A" Position Sensor Circuit "B" Range/Performance (P0C5B): 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, open or shorted wiring in the circuit, blown fuse feeding the circuit.
• P0C5C — P0C5C — Drive Motor "A" Position Sensor Circuit "B" 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, poor ground connection, blown fuse feeding the circuit.
• P0C5D — P0C5D — Drive Motor "A" Position Sensor Circuit "B" High. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: poor ground connection, control module driver fault, blown fuse feeding the circuit.
• P0C5E — P0C5E — Drive Motor "A" Position Sensor Circuit "B" Intermittent/Erratic. 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.
• P0C5F — OBD2 code P0C5F flags a problem with the sensor and actuator circuits (drive motor "B" position sensor circuit "B"). The car is usually drivable while you plan the repair. Common culprits: faulty sensor or actuator of the affected circuit, poor ground connection, blown fuse feeding the circuit.
• P0C60 — OBD2 code P0C60 flags a problem with the sensor and actuator circuits (drive motor "B" position sensor circuit "B" range/performance). The car is usually drivable while you plan the repair. Common culprits: faulty sensor or actuator of the affected circuit, control module driver fault, open or shorted wiring in the circuit.
• P0C61 — OBD2 code P0C61 flags a problem with the sensor and actuator circuits (drive motor "B" position sensor circuit "B" low). The car is usually drivable while you plan the repair. Common culprits: poor ground connection, control module driver fault, faulty sensor or actuator of the affected circuit.
• P0C62 — P0C62 — Drive Motor "B" Position Sensor Circuit "B" High. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: poor ground connection, corroded, loose or damaged connector, control module driver fault.
• P0C63 — P0C63 — Drive Motor "B" Position Sensor Circuit "B" Intermittent/Erratic. 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, control module driver fault.
• P0C64 — P0C64 — Generator Position Sensor Circuit "A". 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, faulty sensor or actuator of the affected circuit.
• P0C65 — Generator Position Sensor Circuit "A" Range/Performance (P0C65): 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, faulty sensor or actuator of the affected circuit.
• P0C66 — OBD2 code P0C66 flags a problem with the sensor and actuator circuits (generator position sensor circuit "A" low). The car is usually drivable while you plan the repair. Common culprits: control module driver fault, open or shorted wiring in the circuit, corroded, loose or damaged connector.
• P0C67 — Generator Position Sensor Circuit "A" High (P0C67): 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, open or shorted wiring in the circuit, faulty sensor or actuator of the affected circuit.
• P0C68 — Generator Position Sensor Circuit "A" Intermittent/Erratic (P0C68): 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, corroded, loose or damaged connector, open or shorted wiring in the circuit.
• P0C69 — P0C69 — Generator Position Sensor Circuit "B". 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.
• P0C6A — Generator Position Sensor Circuit "B" Range/Performance (P0C6A): 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, faulty sensor or actuator of the affected circuit.
• P0C6B — Generator Position Sensor Circuit "B" Low (P0C6B): 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, faulty sensor or actuator of the affected circuit.
• P0C6C — Generator Position Sensor Circuit "B" High (P0C6C): 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, corroded, loose or damaged connector.
• P0C6D — OBD2 code P0C6D flags a problem with the sensor and actuator circuits (generator position sensor circuit "B" intermittent/erratic). The car is usually drivable while you plan the repair. Common culprits: faulty sensor or actuator of the affected circuit, poor ground connection, blown fuse feeding the circuit.
• P0C6E — P0C6E — Hybrid Battery Temperature Sensor "A"/"B" Correlation. 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, open or shorted wiring in the circuit.
• P0C6F — Hybrid Battery Temperature Sensor "B"/"C" Correlation (P0C6F): 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, open or shorted wiring in the circuit, corroded, loose or damaged connector.
• P0C70 — OBD2 code P0C70 flags a problem with the sensor and actuator circuits (hybrid battery temperature sensor "C"/"D" correlation). The car is usually drivable while you plan the repair. Common culprits: poor ground connection, control module driver fault, faulty sensor or actuator of the affected circuit.
• P0C71 — OBD2 code P0C71 flags a problem with the sensor and actuator circuits (hybrid battery temperature sensor "D"/"E" correlation). The car is usually drivable while you plan the repair. Common culprits: faulty sensor or actuator of the affected circuit, corroded, loose or damaged connector, open or shorted wiring in the circuit.