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.

B2561 — OBD2 code B2561 flags a problem with the body electrical system (aux A/C blower speed 1 circuit failure). 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, body control module (BCM) fault.
B2562 — B2562 — Aux A/C Blower Speed 1 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, corroded or loose connectors, damaged wiring in door jambs or wet areas.
B2563 — Aux A/C Blower Speed 2 Circuit Failure (B2563): 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.
B2564 — Aux A/C Blower Speed 2 Circuit Short to Ground (B2564): 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.
B2565 — OBD2 code B2565 flags a problem with the body electrical system (right tail lamp 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, corroded or loose connectors.
B2566 — Right Tail Lamp Circuit Short to Ground (B2566): 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, corroded or loose connectors, blown fuse or failed relay.
B2567 — B2567 — Reverse Mirror Output 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, body control module (BCM) fault, faulty switch, motor or actuator of the affected system.
B2568 — OBD2 code B2568 flags a problem with the body electrical system (reverse mirror output circuit short to ground). The car is usually drivable while you plan the repair. Common culprits: body control module (BCM) fault, blown fuse or failed relay, damaged wiring in door jambs or wet areas.
B2569 — OBD2 code B2569 flags a problem with the body electrical system (liftgate disarm switch 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, damaged wiring in door jambs or wet areas.
B2570 — Right Lamp Outage Signal Circuit Short to Ground (B2570): 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.
B2571 — Left Lamp Outage Signal Circuit Short to Ground (B2571): 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, corroded or loose connectors, blown fuse or failed relay.
B2580 — OBD2 code B2580 flags a problem with the body electrical system (aux blower sense switch circuit failure). The car is usually drivable while you plan the repair. Common culprits: damaged wiring in door jambs or wet areas, faulty switch, motor or actuator of the affected system, corroded or loose connectors.
B2581 — B2581 — Passenger Seat Occupant Detection Circuit Short To Ground. A fault in the airbag / restraint system (SRS). Short, gentle driving to a shop is usually possible. Typical causes: depleted backup battery or low system voltage, faulty impact or occupancy sensor, damaged wiring under seats or in the steering column.
B2582 — B2582 — Passenger Seat Occupant Detection 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, depleted backup battery or low system voltage, faulty impact or occupancy sensor.
B2583 — Child Seat Detection Circuit Short to Ground (B2583): 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, damaged wiring in door jambs or wet areas, blown fuse or failed relay.
B2584 — Child Seat Detection Circuit Open (B2584): 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, faulty switch, motor or actuator of the affected system.
B2585 — Anti Theft Input Signal Circuit Short To Battery (B2585): 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, faulty switch, motor or actuator of the affected system.
B2586 — Headlamp Mode Select Circuit Failure (B2586): 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, body control module (BCM) fault.
B2587 — OBD2 code B2587 flags a problem with the airbag / restraint system (SRS) (passenger seat occupant detection circuit short to battery). Short, gentle driving to a shop is usually possible. Common culprits: damaged wiring under seats or in the steering column, faulty impact or occupancy sensor, failed clockspring (driver airbag circuit).
B2588 — OBD2 code B2588 flags a problem with the body electrical system (child seat detection 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.
B2589 — B2589 — Unexpected Door Reversal During Close. 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.
B2590 — B2590 — Vehicle Park/Speed Signal 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.
B2591 — Detent Signal Missing During Unlatch (B2591): 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, faulty switch, motor or actuator of the affected system.
B2592 — B2592 — PSD Not Fully Closed (Module Commanded Successfully). 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, faulty switch, motor or actuator of the affected system.