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

• B2116 — B2116 — Door Driver Reset Switch Stuck 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, corroded or loose connectors.
• B2117 — OBD2 code B2117 flags a problem with the body electrical system (driver side). 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, body control module (BCM) fault.
• B2118 — B2118 — Passenger Side. 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, body control module (BCM) fault.
• B2119 — OBD2 code B2119 flags a problem with the body electrical system (compressor failure). 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.
• B2120 — B2120 — Door Passenger Set Switch Stuck 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, corroded or loose connectors, faulty switch, motor or actuator of the affected system.
• B2122 — B2122 — Driver Side Satellite Communication 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, body control module (BCM) fault, corroded or loose connectors.
• B2123 — Passenger Side Satellite Communication Circuit Short to Ground (B2123): 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, blown fuse or failed relay, faulty switch, motor or actuator of the affected system.
• B2124 — B2124 — Door Passenger Reset Switch Stuck 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, faulty switch, motor or actuator of the affected system, blown fuse or failed relay.
• B2128 — OBD2 code B2128 flags a problem with the body electrical system (central lock motor failure). 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.
• B2129 — OBD2 code B2129 flags a problem with the body electrical system (central lock feedback failure). 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.
• B2130 — OBD2 code B2130 flags a problem with the body electrical system (double lock timeout 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.
• B2131 — Double Lock Feedback Failure (B2131): 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, faulty switch, motor or actuator of the affected system.
• B2132 — Dimmer switch Circuit Short to Gnd (B2132): 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, corroded or loose connectors.
• B2133 — OBD2 code B2133 flags a problem with the ABS / stability control (brake motor warning lamp circuit failure). Short, gentle driving to a shop is usually possible. Common culprits: blown fuse or low voltage to the ABS module, damaged sensor wiring or corroded connector, failed wheel speed sensor.
• B2134 — OBD2 code B2134 flags a problem with the ABS / stability control (brake motor warning lamp circuit short to vbatt). Short, gentle driving to a shop is usually possible. Common culprits: damaged tone (reluctor) ring on the hub, blown fuse or low voltage to the ABS module, failed wheel speed sensor.
• B2135 — OBD2 code B2135 flags a problem with the ABS / stability control (park brake applied warning lamp circuit failure). Short, gentle driving to a shop is usually possible. Common culprits: damaged tone (reluctor) ring on the hub, damaged sensor wiring or corroded connector, faulty ABS module or pump motor.
• B2136 — OBD2 code B2136 flags a problem with the ABS / stability control (park brake applied warning lamp circuit short to battery). Short, gentle driving to a shop is usually possible. Common culprits: damaged tone (reluctor) ring on the hub, blown fuse or low voltage to the ABS module, faulty ABS module or pump motor.
• B2139 — Data Mismatch (receive data does not match what was expected) (B2139): 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, corroded or loose connectors.
• B2141 — NVM Configuration Failure (B2141): 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, body control module (BCM) fault.
• B2142 — NVM TIC Failure (B2142): 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, damaged wiring in door jambs or wet areas, blown fuse or failed relay.
• B2143 — OBD2 code B2143 flags a problem with the body electrical system (NVM memory 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, body control module (BCM) fault.
• B2144 — OBD2 code B2144 flags a problem with the body electrical system (NVM alarm data failure). 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, damaged wiring in door jambs or wet areas.
• B2145 — B2145 — NVM RF HR 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.
• B2146 — B2146 — Seat Recline Motor Position Out of Range. 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.