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

• P1456 — P1456 — Evap Emission Control Sys Vent Control Valve Circuit. A fault in the evaporative emission (EVAP) system. The car is usually drivable while you plan the repair. Typical causes: cracked EVAP hoses or lines, saturated or damaged charcoal canister, small leak in the fuel tank or filler neck.
• P1457 — P1457 — Unable To Bleed - Up Vacuum in Tank. 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, blown fuse feeding the circuit, open or shorted wiring in the circuit.
• P1458 — P1458 — Injection Timing Solenoid Circuit Fault. P1458 can affect injection control and may cause hesitation, rough operation, or stalling.
• P1459 — P1459 — A/C Recirculation Switch Out of Range. P1459 primarily affects recirculation-mode control rather than engine cooling or vehicle drivability.
• P1460 — OBD2 code P1460 flags a problem with the sensor and actuator circuits (fuel tank pressure relief valve malfunction). 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.
• P1461 — OBD2 code P1461 flags a problem with the evaporative emission (EVAP) system (evaporative system vacuum test malfunction). The car is usually drivable while you plan the repair. Common culprits: faulty purge valve (canister purge solenoid), cracked EVAP hoses or lines, saturated or damaged charcoal canister.
• P1462 — Evap Emission Control Sys Leak Detected (Gross Leak/No Flow) (P1462): a powertrain (engine/transmission) fault affecting the evaporative emission (EVAP) system. The car is usually drivable while you plan the repair. Most often caused by faulty purge valve (canister purge solenoid), faulty vent valve or leak detection pump, small leak in the fuel tank or filler neck.
• P1463 — Fuel Tank Temperature Sensor Circuit Malfunction (P1463): 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, control module driver fault.
• P1464 — P1464 — Unable To Pull Vacuum In Tank. 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, corroded, loose or damaged connector, control module driver fault.
• P1465 — Wide open throttle A/C cutoff relay circuit (P1465): a powertrain (engine/transmission) fault affecting the throttle and intake air metering. Short, gentle driving to a shop is usually possible. Most often caused by intake air leaks after the MAF sensor, wiring or connector faults in the throttle circuit, dirty throttle body or stuck throttle plate.
• P1466 — P1466 — A/C pressure sensor circuit voltage 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, control module driver fault, corroded, loose or damaged connector.
• P1467 — A/C pressure sensor circuit voltage high (P1467): 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.
• P1468 — OBD2 code P1468 flags a problem with the sensor and actuator circuits (A/C pressure sensor insufficient pressure change). 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.
• P1469 — A/C Demand Out of Self Test Range (P1469): 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, poor ground connection, corroded, loose or damaged connector.
• P1471 — A/C Refrigerant Temperature Sensor/Circuit Malfunction (P1471): 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, faulty sensor or actuator of the affected circuit, control module driver fault.
• P1472 — A/C Compressor Temperature Sensor Malfunction (P1472): 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, corroded, loose or damaged connector.
• P1473 — OBD2 code P1473 flags a problem with the sensor and actuator circuits (SSPOD open circuit or closed circuit fault). 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.
• P1474 — Low A/C Cycling Period (P1474): 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, control module driver fault.
• P1475 — P1475 — A/C Cycling Period Too Short. 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.
• P1476 — Electrodrive Fan 1 Operational Failure (Driver Side) (P1476): 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.
• P1477 — OBD2 code P1477 flags a problem with the sensor and actuator circuits (electrodrive fan 2 operational failure (passenger side)). 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.
• P1478 — Fan Secondary High With Fan(s) Off (P1478): 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.
• P1479 — OBD2 code P1479 flags a problem with the sensor and actuator circuits (low fan control primary circuit malfunction). 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.
• P1481 — OBD2 code P1481 flags a problem with the sensor and actuator circuits (fan relay (High) circuit malfunction). 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, control module driver fault.