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

• B1440 — Wiper Mode Select Switch Circuit Short To Battery (B1440): 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, corroded or loose connectors.
• B1441 — OBD2 code B1441 flags a problem with the body electrical system (wiper mode select switch 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, body control module (BCM) fault.
• B1442 — Door Handle Switch Circuit Failure (B1442): 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, damaged wiring in door jambs or wet areas.
• B1443 — B1443 — Door Handle Switch 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, corroded or loose connectors, body control module (BCM) fault.
• B1444 — Door Handle Switch Circuit Short To Battery (B1444): 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, blown fuse or failed relay, body control module (BCM) fault.
• B1445 — B1445 — Door Handle Switch Circuit Short To Ground. 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.
• B1446 — B1446 — Wiper Park Sense Circuit Failure. 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, blown fuse or failed relay.
• B1447 — B1447 — Wiper Park Sense 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, blown fuse or failed relay.
• B1448 — B1448 — Wiper Park Sense 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, blown fuse or failed relay, corroded or loose connectors.
• B1449 — OBD2 code B1449 flags a problem with the body electrical system (wiper park sense circuit short to ground). The car is usually drivable while you plan the repair. Common culprits: faulty switch, motor or actuator of the affected system, body control module (BCM) fault, corroded or loose connectors.
• B1450 — Wiper Wash/Delay Switch Circuit Failure (B1450): 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, damaged wiring in door jambs or wet areas.
• B1451 — B1451 — Wiper Wash/Delay Switch 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.
• B1452 — B1452 — Wiper Wash/Delay Switch 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, corroded or loose connectors.
• B1453 — OBD2 code B1453 flags a problem with the body electrical system (wiper wash/delay switch 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, body control module (BCM) fault.
• B1454 — B1454 — Wiper Washer Fluid Lamp Circuit Failure. 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.
• B1455 — OBD2 code B1455 flags a problem with the body electrical system (wiper washer fluid lamp 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, blown fuse or failed relay.
• B1456 — Wiper Washer Fluid Lamp Circuit Short To Battery (B1456): 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, body control module (BCM) fault.
• B1457 — B1457 — Wiper Washer Fluid Lamp Circuit Short To Ground. 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.
• B1458 — B1458 — Wiper Washer Pump Motor Relay Circuit Failure. 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, damaged wiring in door jambs or wet areas.
• B1459 — Wiper Washer Pump Motor Relay Coil Circuit Open (B1459): a body electrical fault affecting the ignition system. Short, gentle driving to a shop is usually possible. Most often caused by moisture or oil in the spark plug wells, failed ignition coil or coil pack, faulty ignition control circuit in the ECM.
• B1460 — OBD2 code B1460 flags a problem with the ignition system (wiper washer pump motor relay coil circuit short to battery). Short, gentle driving to a shop is usually possible. Common culprits: faulty ignition control circuit in the ECM, damaged coil wiring or connector, moisture or oil in the spark plug wells.
• B1461 — OBD2 code B1461 flags a problem with the ignition system (wiper washer pump motor relay coil circuit short to ground). Short, gentle driving to a shop is usually possible. Common culprits: faulty ignition control circuit in the ECM, worn spark plugs or wrong plug gap, damaged coil wiring or connector.
• B1462 — Seat Belt Switch Circuit Failure (B1462): a body electrical fault affecting the airbag / restraint system (SRS). Short, gentle driving to a shop is usually possible. Most often caused by damaged wiring under seats or in the steering column, failed clockspring (driver airbag circuit), faulty impact or occupancy sensor.
• B1463 — B1463 — Seat Belt Switch Circuit Open. A fault in the airbag / restraint system (SRS). Short, gentle driving to a shop is usually possible. Typical causes: damaged wiring under seats or in the steering column, SRS control module fault or stored crash data, depleted backup battery or low system voltage.