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

• B2303 — Seat Headrest Feedback Potentiometer Circuit Open (B2303): 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.
• B2304 — OBD2 code B2304 flags a problem with the body electrical system (seat headrest feedback potentiometer circuit short to battery). 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.
• B2305 — Seat Headrest Feedback Potentiometer Circuit Short to Ground (B2305): 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.
• B2306 — OBD2 code B2306 flags a problem with the body electrical system (seat headrest motor stalled). 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.
• B2310 — Mirror Driver Memory Position Error (B2310): 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, corroded or loose connectors.
• B2311 — B2311 — Mirror Passenger Memory Position Error. 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, blown fuse or failed relay.
• B2312 — Mirror Passenger Horizontal Feedback Potentiometer Circuit Failure (B2312): 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.
• B2313 — OBD2 code B2313 flags a problem with the body electrical system (mirror passenger horizontal feedback potentiometer circuit open). The car is usually drivable while you plan the repair. Common culprits: blown fuse or failed relay, corroded or loose connectors, damaged wiring in door jambs or wet areas.
• B2314 — OBD2 code B2314 flags a problem with the body electrical system (mirror passenger horizontal feedback potentiometer 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, body control module (BCM) fault.
• B2315 — B2315 — Mirror Passenger Horizontal Feedback Potentiometer 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, damaged wiring in door jambs or wet areas.
• B2316 — B2316 — Mirror Passenger Vertical Feedback Potentiometer 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, damaged wiring in door jambs or wet areas, corroded or loose connectors.
• B2317 — Mirror Passenger Vertical Feedback Potentiometer Circuit Open (B2317): 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.
• B2318 — B2318 — Mirror Passenger Vertical Feedback Potentiometer 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, blown fuse or failed relay.
• B2319 — OBD2 code B2319 flags a problem with the body electrical system (mirror passenger vertical feedback potentiometer 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.
• B2320 — B2320 — Mirror Driver Horizontal Feedback Potentiometer 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, damaged wiring in door jambs or wet areas, faulty switch, motor or actuator of the affected system.
• B2321 — Mirror Driver Horizontal Feedback Potentiometer Circuit Open (B2321): 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, faulty switch, motor or actuator of the affected system.
• B2322 — OBD2 code B2322 flags a problem with the body electrical system (mirror driver horizontal feedback potentiometer circuit short to battery). 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.
• B2323 — Mirror Driver Horizontal Feedback Potentiometer Circuit Short to Ground (B2323): 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.
• B2324 — OBD2 code B2324 flags a problem with the body electrical system (mirror driver vertical feedback potentiometer circuit failure). The car is usually drivable while you plan the repair. Common culprits: body control module (BCM) fault, corroded or loose connectors, blown fuse or failed relay.
• B2325 — OBD2 code B2325 flags a problem with the body electrical system (mirror driver vertical feedback potentiometer circuit open). The car is usually drivable while you plan the repair. Common culprits: corroded or loose connectors, blown fuse or failed relay, body control module (BCM) fault.
• B2326 — B2326 — Mirror Driver Vertical Feedback Potentiometer 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, body control module (BCM) fault, faulty switch, motor or actuator of the affected system.
• B2327 — B2327 — Mirror Driver Vertical Feedback Potentiometer 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, body control module (BCM) fault.
• B2328 — Column Reach Feedback Potentiometer Circuit Failure (B2328): 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.
• B2329 — Column Reach Feedback Potentiometer Circuit Open (B2329): 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.