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

• B1560 — B1560 — Door Lock Cylinder Circuit Open. A fault in the body electrical system. The car is usually drivable while you plan the repair. Typical causes: corroded or loose connectors, faulty switch, motor or actuator of the affected system, body control module (BCM) fault.
• B1561 — B1561 — Door Lock Cylinder Circuit Short To Battery. A fault in the body electrical system. The car is usually drivable while you plan the repair. Typical causes: faulty switch, motor or actuator of the affected system, body control module (BCM) fault, blown fuse or failed relay.
• B1562 — OBD2 code B1562 flags a problem with the body electrical system (door lock cylinder circuit short to ground). The car is usually drivable while you plan the repair. Common culprits: corroded or loose connectors, faulty switch, motor or actuator of the affected system, damaged wiring in door jambs or wet areas.
• B1563 — OBD2 code B1563 flags a problem with the body electrical system (door ajar circuit failure). The car is usually drivable while you plan the repair. Common culprits: body control module (BCM) fault, faulty switch, motor or actuator of the affected system, blown fuse or failed relay.
• B1564 — B1564 — Door Ajar Circuit Open. A fault in the body electrical system. The car is usually drivable while you plan the repair. Typical causes: damaged wiring in door jambs or wet areas, faulty switch, motor or actuator of the affected system, blown fuse or failed relay.
• B1565 — OBD2 code B1565 flags a problem with the body electrical system (door ajar circuit short to battery). The car is usually drivable while you plan the repair. Common culprits: corroded or loose connectors, faulty switch, motor or actuator of the affected system, damaged wiring in door jambs or wet areas.
• B1566 — B1566 — Door Ajar Circuit Short To Ground. A fault in the body electrical system. The car is usually drivable while you plan the repair. Typical causes: body control module (BCM) fault, faulty switch, motor or actuator of the affected system, corroded or loose connectors.
• B1567 — OBD2 code B1567 flags a problem with the body electrical system (lamp headlamp high-beam circuit failure). The car is usually drivable while you plan the repair. Common culprits: body control module (BCM) fault, faulty switch, motor or actuator of the affected system, corroded or loose connectors.
• B1568 — B1568 — Lamp Headlamp High-Beam Circuit Open. A fault in the body electrical system. The car is usually drivable while you plan the repair. Typical causes: body control module (BCM) fault, damaged wiring in door jambs or wet areas, corroded or loose connectors.
• B1569 — Lamp Headlamp High-Beam Circuit Short To Battery (B1569): a body electrical fault affecting the body electrical system. The car is usually drivable while you plan the repair. Most often caused by damaged wiring in door jambs or wet areas, body control module (BCM) fault, blown fuse or failed relay.
• B1570 — B1570 — Lamp Headlamp High-Beam Circuit Short To Ground. A fault in the body electrical system. The car is usually drivable while you plan the repair. Typical causes: blown fuse or failed relay, corroded or loose connectors, damaged wiring in door jambs or wet areas.
• B1571 — OBD2 code B1571 flags a problem with the body electrical system (door ajar LR circuit failure). The car is usually drivable while you plan the repair. Common culprits: body control module (BCM) fault, faulty switch, motor or actuator of the affected system, blown fuse or failed relay.
• B1572 — B1572 — Door Ajar LR Circuit Open. A fault in the body electrical system. The car is usually drivable while you plan the repair. Typical causes: blown fuse or failed relay, faulty switch, motor or actuator of the affected system, corroded or loose connectors.
• B1573 — OBD2 code B1573 flags a problem with the body electrical system (door ajar LR circuit short to battery). The car is usually drivable while you plan the repair. Common culprits: corroded or loose connectors, body control module (BCM) fault, damaged wiring in door jambs or wet areas.
• B1574 — B1574 — Door Ajar LR Circuit Short To Ground. A fault in the body electrical system. The car is usually drivable while you plan the repair. Typical causes: faulty switch, motor or actuator of the affected system, damaged wiring in door jambs or wet areas, corroded or loose connectors.
• B1575 — OBD2 code B1575 flags a problem with the body electrical system (lamp park input circuit failure). The car is usually drivable while you plan the repair. Common culprits: corroded or loose connectors, faulty switch, motor or actuator of the affected system, body control module (BCM) fault.
• B1576 — OBD2 code B1576 flags a problem with the body electrical system (lamp park input circuit open). The car is usually drivable while you plan the repair. Common culprits: blown fuse or failed relay, faulty switch, motor or actuator of the affected system, damaged wiring in door jambs or wet areas.
• B1577 — B1577 — Lamp Park Input Circuit Short To Battery. A fault in the body electrical system. The car is usually drivable while you plan the repair. Typical causes: blown fuse or failed relay, body control module (BCM) fault, faulty switch, motor or actuator of the affected system.
• B1578 — OBD2 code B1578 flags a problem with the body electrical system (lamp park input circuit short to ground). The car is usually drivable while you plan the repair. Common culprits: blown fuse or failed relay, damaged wiring in door jambs or wet areas, faulty switch, motor or actuator of the affected system.
• B1579 — B1579 — Dim Panel Increase Input Circuit Failure. A fault in the body electrical system. The car is usually drivable while you plan the repair. Typical causes: blown fuse or failed relay, corroded or loose connectors, faulty switch, motor or actuator of the affected system.
• B1580 — OBD2 code B1580 flags a problem with the body electrical system (dim panel increase input circuit open). The car is usually drivable while you plan the repair. Common culprits: corroded or loose connectors, faulty switch, motor or actuator of the affected system, blown fuse or failed relay.
• B1581 — B1581 — Dim Panel Increase Input Circuit Short To Battery. A fault in the body electrical system. The car is usually drivable while you plan the repair. Typical causes: body control module (BCM) fault, damaged wiring in door jambs or wet areas, faulty switch, motor or actuator of the affected system.
• B1582 — B1582 — Dim Panel Increase Input Circuit Short To Ground. A fault in the body electrical system. The car is usually drivable while you plan the repair. Typical causes: blown fuse or failed relay, faulty switch, motor or actuator of the affected system, body control module (BCM) fault.
• B1583 — B1583 — Dim Panel Decrease Input Circuit Failure. A fault in the body electrical system. The car is usually drivable while you plan the repair. Typical causes: body control module (BCM) fault, corroded or loose connectors, faulty switch, motor or actuator of the affected system.