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

• B1392 — B1392 — Power Door Memory Lock Relay Circuit Failure. 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, blown fuse or failed relay, body control module (BCM) fault.
• B1393 — B1393 — Power Door Memory Lock Relay 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, body control module (BCM) fault, corroded or loose connectors.
• B1394 — B1394 — Power Door Memory Lock Relay 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, corroded or loose connectors, faulty switch, motor or actuator of the affected system.
• B1395 — Power Door Memory Lock Relay Circuit Short To Ground (B1395): 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.
• B1396 — OBD2 code B1396 flags a problem with the body electrical system (power door lock circuit short to battery). The car is usually drivable while you plan the repair. Common culprits: damaged wiring in door jambs or wet areas, body control module (BCM) fault, faulty switch, motor or actuator of the affected system.
• B1397 — B1397 — Power Door Unlock 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.
• B1398 — OBD2 code B1398 flags a problem with the body electrical system (driver power window one touch window relay circuit failure). The car is usually drivable while you plan the repair. Common culprits: faulty switch, motor or actuator of the affected system, corroded or loose connectors, body control module (BCM) fault.
• B1399 — B1399 — Driver Power Window One Touch Window Relay 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, corroded or loose connectors, faulty switch, motor or actuator of the affected system.
• B1400 — Driver Power Window One Touch Window Relay Circuit Short To Battery (B1400): a body electrical fault affecting the body electrical system. The car is usually drivable while you plan the repair. Most often caused by body control module (BCM) fault, blown fuse or failed relay, corroded or loose connectors.
• B1401 — Driver Power Window One Touch Window Relay Circuit Short To Ground (B1401): 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, faulty switch, motor or actuator of the affected system, blown fuse or failed relay.
• B1402 — B1402 — Driver Power Window Down Switch 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, faulty switch, motor or actuator of the affected system, damaged wiring in door jambs or wet areas.
• B1403 — OBD2 code B1403 flags a problem with the body electrical system (driver power window up switch circuit failure). The car is usually drivable while you plan the repair. Common culprits: faulty switch, motor or actuator of the affected system, blown fuse or failed relay, damaged wiring in door jambs or wet areas.
• B1404 — Driver Power Window Down Circuit Open (B1404): 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, body control module (BCM) fault, faulty switch, motor or actuator of the affected system.
• B1405 — Driver Power Window Down Circuit Short To Battery (B1405): a body electrical fault affecting the body electrical system. The car is usually drivable while you plan the repair. Most often caused by body control module (BCM) fault, faulty switch, motor or actuator of the affected system, damaged wiring in door jambs or wet areas.
• B1406 — B1406 — Driver Power Window Down 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, blown fuse or failed relay, body control module (BCM) fault.
• B1407 — B1407 — Driver Power Window Up 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, faulty switch, motor or actuator of the affected system, damaged wiring in door jambs or wet areas.
• B1408 — B1408 — Driver Power Window Up Circuit Short To Battery. 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, corroded or loose connectors, blown fuse or failed relay.
• B1409 — B1409 — Driver Power Window Up Circuit Short To Ground. A fault in the body electrical system. The car is usually drivable while you plan the repair. Typical causes: corroded or loose connectors, body control module (BCM) fault, damaged wiring in door jambs or wet areas.
• B1410 — Driver Power Window Motor Circuit Failure (B1410): a body electrical fault affecting the body electrical system. The car is usually drivable while you plan the repair. Most often caused by body control module (BCM) fault, damaged wiring in door jambs or wet areas, blown fuse or failed relay.
• B1411 — B1411 — Driver Power Window Motor 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, body control module (BCM) fault.
• B1412 — Driver Power Window Motor Circuit Short To Battery (B1412): 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.
• B1413 — OBD2 code B1413 flags a problem with the body electrical system (driver power window motor circuit short to ground). The car is usually drivable while you plan the repair. Common culprits: blown fuse or failed relay, body control module (BCM) fault, damaged wiring in door jambs or wet areas.
• B1414 — B1414 — Power Window LR Motor Circuit Failure. 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, blown fuse or failed relay, faulty switch, motor or actuator of the affected system.
• B1415 — OBD2 code B1415 flags a problem with the body electrical system (power window LR motor circuit open). The car is usually drivable while you plan the repair. Common culprits: body control module (BCM) fault, damaged wiring in door jambs or wet areas, blown fuse or failed relay.