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

• P0573 — P0573 — Cruise Control/Brake Switch A Circuit High. A fault in the ABS / stability control. Short, gentle driving to a shop is usually possible. Typical causes: faulty ABS module or pump motor, damaged tone (reluctor) ring on the hub, blown fuse or low voltage to the ABS module.
• P0574 — P0574 — Cruise Control System - Vehicle Speed Too High. 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.
• P0575 — OBD2 code P0575 flags a problem with the sensor and actuator circuits (cruise control input circuit). The car is usually drivable while you plan the repair. Common culprits: faulty sensor or actuator of the affected circuit, open or shorted wiring in the circuit, corroded, loose or damaged connector.
• P0576 — OBD2 code P0576 flags a problem with the sensor and actuator circuits (cruise control input circuit low). 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.
• P0577 — OBD2 code P0577 flags a problem with the sensor and actuator circuits (cruise control input circuit high). The car is usually drivable while you plan the repair. Common culprits: control module driver fault, open or shorted wiring in the circuit, faulty sensor or actuator of the affected circuit.
• P0578 — Cruise Control Multi-Function Input "A" Circuit Stuck (P0578): 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, open or shorted wiring in the circuit.
• P0579 — OBD2 code P0579 flags a problem with the sensor and actuator circuits (cruise control multi-function input "A" circuit range/performance). The car is usually drivable while you plan the repair. Common culprits: control module driver fault, corroded, loose or damaged connector, blown fuse feeding the circuit.
• P0580 — OBD2 code P0580 flags a problem with the sensor and actuator circuits (cruise control multi-function input "A" circuit low). The car is usually drivable while you plan the repair. Common culprits: faulty sensor or actuator of the affected circuit, open or shorted wiring in the circuit, control module driver fault.
• P0581 — Cruise Control Multi-Function Input "A" Circuit High (P0581): 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, control module driver fault, faulty sensor or actuator of the affected circuit.
• P0582 — OBD2 code P0582 flags a problem with the sensor and actuator circuits (cruise control vacuum control circuit /open). The car is usually drivable while you plan the repair. Common culprits: corroded, loose or damaged connector, open or shorted wiring in the circuit, control module driver fault.
• P0583 — OBD2 code P0583 flags a problem with the sensor and actuator circuits (cruise control vacuum control circuit low). The car is usually drivable while you plan the repair. Common culprits: corroded, loose or damaged connector, poor ground connection, open or shorted wiring in the circuit.
• P0584 — OBD2 code P0584 flags a problem with the sensor and actuator circuits (cruise control vacuum control circuit high). The car is usually drivable while you plan the repair. Common culprits: corroded, loose or damaged connector, poor ground connection, faulty sensor or actuator of the affected circuit.
• P0585 — OBD2 code P0585 flags a problem with the sensor and actuator circuits (cruise control multi-function input "A"/"B" correlation). The car is usually drivable while you plan the repair. Common culprits: corroded, loose or damaged connector, blown fuse feeding the circuit, open or shorted wiring in the circuit.
• P0586 — P0586 — Cruise Control Vent Control Circuit/Open. 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, poor ground connection, corroded, loose or damaged connector.
• P0587 — Cruise Control Vent Control Circuit Low (P0587): 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, corroded, loose or damaged connector.
• P0588 — P0588 — Cruise Control Vent Control Circuit High. 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, blown fuse feeding the circuit, faulty sensor or actuator of the affected circuit.
• P0589 — OBD2 code P0589 flags a problem with the sensor and actuator circuits (cruise control multi-function input "B" 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.
• P0590 — OBD2 code P0590 flags a problem with the sensor and actuator circuits (cruise control multi-function input "B" circuit stuck). The car is usually drivable while you plan the repair. Common culprits: corroded, loose or damaged connector, faulty sensor or actuator of the affected circuit, control module driver fault.
• P0591 — P0591 — Cruise Control Multi-Function Input "B" Circuit Range/Performance. 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, control module driver fault, faulty sensor or actuator of the affected circuit.
• P0592 — OBD2 code P0592 flags a problem with the sensor and actuator circuits (cruise control multi-function input "B" circuit 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, control module driver fault.
• P0593 — P0593 — Cruise Control Multi-Function Input "B" Circuit High. 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, poor ground connection, blown fuse feeding the circuit.
• P0594 — OBD2 code P0594 flags a problem with the sensor and actuator circuits (cruise control servo control circuit/open). The car is usually drivable while you plan the repair. Common culprits: faulty sensor or actuator of the affected circuit, blown fuse feeding the circuit, control module driver fault.
• P0595 — P0595 — Cruise Control Servo Control 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, corroded, loose or damaged connector.
• P0596 — Cruise Control Servo Control Circuit High (P0596): 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, control module driver fault.