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

• P3461 — P3461 — Cylinder 8 Exhaust Valve Control Circuit/Open. 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, corroded, loose or damaged connector.
• P3462 — P3462 — Cylinder 8 Exhaust Valve Control Circuit Performance. 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, poor ground connection.
• P3463 — OBD2 code P3463 flags a problem with the sensor and actuator circuits (cylinder 8 exhaust valve control 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.
• P3464 — Cylinder 8 Exhaust Valve Control Circuit High (P3464): 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.
• P3465 — P3465 — Cylinder 9 Deactivation/Intake Valve Control Circuit/Open. 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, faulty sensor or actuator of the affected circuit.
• P3466 — Cylinder 9 Deactivation/Intake Valve Control Circuit Performance (P3466): 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, poor ground connection.
• P3467 — Cylinder 9 Deactivation/Intake Valve Control Circuit Low (P3467): 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, corroded, loose or damaged connector, poor ground connection.
• P3468 — OBD2 code P3468 flags a problem with the sensor and actuator circuits (cylinder 9 deactivation/intake valve control circuit 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, poor ground connection.
• P3469 — Cylinder 9 Exhaust Valve Control Circuit/Open (P3469): 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, open or shorted wiring in the circuit, poor ground connection.
• P3470 — P3470 — Cylinder 9 Exhaust Valve Control Circuit Performance. 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.
• P3471 — Cylinder 9 Exhaust Valve Control Circuit Low (P3471): 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, corroded, loose or damaged connector, poor ground connection.
• P3472 — P3472 — Cylinder 9 Exhaust Valve Control Circuit 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, open or shorted wiring in the circuit, poor ground connection.
• P3473 — P3473 — Cylinder 10 Deactivation/Intake Valve Control Circuit/Open. 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.
• P3474 — OBD2 code P3474 flags a problem with the sensor and actuator circuits (cylinder 10 deactivation/intake valve control circuit performance). 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.
• P3475 — P3475 — Cylinder 10 Deactivation/Intake Valve Control Circuit Low. 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.
• P3476 — Cylinder 10 Deactivation/Intake Valve Control Circuit High (P3476): 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, control module driver fault, open or shorted wiring in the circuit.
• P3477 — OBD2 code P3477 flags a problem with the sensor and actuator circuits (cylinder 10 exhaust valve control circuit/open). 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.
• P3478 — P3478 — Cylinder 10 Exhaust Valve Control Circuit 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, poor ground connection, faulty sensor or actuator of the affected circuit.
• P3479 — P3479 — Cylinder 10 Exhaust Valve Control Circuit 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, corroded, loose or damaged connector.
• P3480 — OBD2 code P3480 flags a problem with the sensor and actuator circuits (cylinder 10 exhaust valve control circuit high). 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.
• P3481 — OBD2 code P3481 flags a problem with the sensor and actuator circuits (cylinder 11 deactivation/intake valve control circuit/open). 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.
• P3482 — OBD2 code P3482 flags a problem with the sensor and actuator circuits (cylinder 11 deactivation/intake valve control circuit performance). The car is usually drivable while you plan the repair. Common culprits: blown fuse feeding the circuit, faulty sensor or actuator of the affected circuit, corroded, loose or damaged connector.
• P3483 — Cylinder 11 Deactivation/Intake Valve Control Circuit Low (P3483): 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, faulty sensor or actuator of the affected circuit.
• P3484 — P3484 — Cylinder 11 Deactivation/Intake Valve Control 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, control module driver fault, corroded, loose or damaged connector.