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

• B1632 — B1632 — Mirror Driver Left 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, body control module (BCM) fault, corroded or loose connectors.
• B1633 — Mirror Driver Left Circuit Short To Battery (B1633): a body electrical fault affecting the body electrical system. The car is usually drivable while you plan the repair. Most often caused by blown fuse or failed relay, damaged wiring in door jambs or wet areas, faulty switch, motor or actuator of the affected system.
• B1634 — OBD2 code B1634 flags a problem with the body electrical system (mirror driver left circuit short to ground). The car is usually drivable while you plan the repair. Common culprits: damaged wiring in door jambs or wet areas, corroded or loose connectors, blown fuse or failed relay.
• B1635 — B1635 — Mirror Driver Right 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, damaged wiring in door jambs or wet areas, corroded or loose connectors.
• B1636 — Mirror Driver Right Circuit Open (B1636): a body electrical fault affecting the body electrical system. The car is usually drivable while you plan the repair. Most often caused by blown fuse or failed relay, corroded or loose connectors, body control module (BCM) fault.
• B1637 — B1637 — Mirror Driver Right 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, corroded or loose connectors, damaged wiring in door jambs or wet areas.
• B1638 — OBD2 code B1638 flags a problem with the body electrical system (mirror driver right short to ground). 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.
• B1639 — Mirror Passenger Left Circuit Failure (B1639): a body electrical fault affecting the body electrical system. The car is usually drivable while you plan the repair. Most often caused by faulty switch, motor or actuator of the affected system, blown fuse or failed relay, body control module (BCM) fault.
• B1640 — Mirror Passenger Left Circuit Open (B1640): a body electrical fault affecting the body electrical system. The car is usually drivable while you plan the repair. Most often caused by faulty switch, motor or actuator of the affected system, corroded or loose connectors, blown fuse or failed relay.
• B1641 — B1641 — Mirror Passenger Left 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, blown fuse or failed relay, corroded or loose connectors.
• B1642 — Mirror Passenger Left Circuit Short To Ground (B1642): a body electrical fault affecting the body electrical system. The car is usually drivable while you plan the repair. Most often caused by corroded or loose connectors, body control module (BCM) fault, faulty switch, motor or actuator of the affected system.
• B1643 — OBD2 code B1643 flags a problem with the body electrical system (mirror passenger right circuit failure). The car is usually drivable while you plan the repair. Common culprits: damaged wiring in door jambs or wet areas, corroded or loose connectors, blown fuse or failed relay.
• B1644 — Mirror Passenger Right Circuit Open (B1644): a body electrical fault affecting the body electrical system. The car is usually drivable while you plan the repair. Most often caused by corroded or loose connectors, faulty switch, motor or actuator of the affected system, blown fuse or failed relay.
• B1645 — B1645 — Mirror Passenger Right 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, blown fuse or failed relay, body control module (BCM) fault.
• B1646 — B1646 — Mirror Passenger Right 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, blown fuse or failed relay, damaged wiring in door jambs or wet areas.
• B1647 — OBD2 code B1647 flags a problem with the body electrical system (seat driver recline forward circuit failure). 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, body control module (BCM) fault.
• B1648 — B1648 — Seat Driver Recline Forward Circuit Open. 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, corroded or loose connectors.
• B1649 — B1649 — Seat Driver Recline Forward Circuit Short To Battery. A fault in the body electrical system. The car is usually drivable while you plan the repair. Typical causes: corroded or loose connectors, damaged wiring in door jambs or wet areas, body control module (BCM) fault.
• B1650 — OBD2 code B1650 flags a problem with the body electrical system (seat driver recline forward circuit short to ground). The car is usually drivable while you plan the repair. Common culprits: corroded or loose connectors, blown fuse or failed relay, faulty switch, motor or actuator of the affected system.
• B1651 — Seat Driver Recline Backward Circuit Failure (B1651): 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, corroded or loose connectors, blown fuse or failed relay.
• B1652 — OBD2 code B1652 flags a problem with the body electrical system (seat driver recline backward circuit open). 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, damaged wiring in door jambs or wet areas.
• B1653 — OBD2 code B1653 flags a problem with the body electrical system (seat driver recline backward circuit short to battery). 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.
• B1654 — OBD2 code B1654 flags a problem with the body electrical system (seat driver recline backward circuit short to ground). The car is usually drivable while you plan the repair. Common culprits: damaged wiring in door jambs or wet areas, blown fuse or failed relay, faulty switch, motor or actuator of the affected system.
• B1655 — OBD2 code B1655 flags a problem with the body electrical system (seat driver rear up circuit failure). 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.