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

• B1872 — OBD2 code B1872 flags a problem with the body electrical system (turn signal / hazard power feed circuit short to battery). 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, blown fuse or failed relay.
• B1873 — Turn Signal / Hazard Power Feed Circuit Short To Ground (B1873): 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, body control module (BCM) fault.
• B1874 — OBD2 code B1874 flags a problem with the body electrical system (cellular phone handset not present). 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, corroded or loose connectors.
• B1875 — Turn Signal / Hazard Switch Signal Circuit Failure (B1875): 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.
• B1876 — OBD2 code B1876 flags a problem with the airbag / restraint system (SRS) (seatbelt driver pretensioner circuit failure). Short, gentle driving to a shop is usually possible. Common culprits: faulty impact or occupancy sensor, SRS control module fault or stored crash data, failed clockspring (driver airbag circuit).
• B1877 — OBD2 code B1877 flags a problem with the airbag / restraint system (SRS) (seatbelt driver pretensioner circuit open). Short, gentle driving to a shop is usually possible. Common culprits: failed clockspring (driver airbag circuit), damaged wiring under seats or in the steering column, SRS control module fault or stored crash data.
• B1878 — B1878 — Seatbelt Driver Pretensioner Circuit Short to Battery. A fault in the airbag / restraint system (SRS). Short, gentle driving to a shop is usually possible. Typical causes: SRS control module fault or stored crash data, faulty impact or occupancy sensor, failed clockspring (driver airbag circuit).
• B1879 — OBD2 code B1879 flags a problem with the airbag / restraint system (SRS) (seatbelt driver pretensioner circuit short to ground). Short, gentle driving to a shop is usually possible. Common culprits: depleted backup battery or low system voltage, SRS control module fault or stored crash data, failed clockspring (driver airbag circuit).
• B1880 — B1880 — Seatbelt Passenger Pretensioner Circuit Failure. A fault in the airbag / restraint system (SRS). Short, gentle driving to a shop is usually possible. Typical causes: SRS control module fault or stored crash data, failed clockspring (driver airbag circuit), faulty impact or occupancy sensor.
• B1881 — OBD2 code B1881 flags a problem with the airbag / restraint system (SRS) (seatbelt passenger pretensioner circuit open). Short, gentle driving to a shop is usually possible. Common culprits: damaged wiring under seats or in the steering column, depleted backup battery or low system voltage, faulty impact or occupancy sensor.
• B1882 — OBD2 code B1882 flags a problem with the airbag / restraint system (SRS) (seatbelt passenger pretensioner circuit short to battery). Short, gentle driving to a shop is usually possible. Common culprits: failed clockspring (driver airbag circuit), SRS control module fault or stored crash data, depleted backup battery or low system voltage.
• B1883 — B1883 — Seatbelt Passenger Pretensioner 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, failed clockspring (driver airbag circuit), damaged wiring under seats or in the steering column.
• B1884 — PAD Warning Lamp Inoperative (B1884): 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, body control module (BCM) fault.
• B1885 — Seatbelt Driver Pretensioner Circuit Resistance Low on Squib (B1885): a body electrical fault affecting the airbag / restraint system (SRS). Short, gentle driving to a shop is usually possible. Most often caused by failed clockspring (driver airbag circuit), damaged wiring under seats or in the steering column, faulty impact or occupancy sensor.
• B1886 — OBD2 code B1886 flags a problem with the airbag / restraint system (SRS) (seatbelt passenger pretensioner circuit resistance low on squib). Short, gentle driving to a shop is usually possible. Common culprits: damaged wiring under seats or in the steering column, failed clockspring (driver airbag circuit), depleted backup battery or low system voltage.
• B1887 — Air Bag Driver Circuit Resistance Low or Shorted Together (B1887): a body electrical fault affecting the airbag / restraint system (SRS). Short, gentle driving to a shop is usually possible. Most often caused by faulty impact or occupancy sensor, depleted backup battery or low system voltage, failed clockspring (driver airbag circuit).
• B1888 — B1888 — Air Bag Passenger Circuit Resistance Low or Shorted Together. 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, SRS control module fault or stored crash data, damaged wiring under seats or in the steering column.
• B1889 — B1889 — Passenger Airbag Disable Module Sensor Obstructed. A fault in the airbag / restraint system (SRS). Short, gentle driving to a shop is usually possible. Typical causes: faulty impact or occupancy sensor, failed clockspring (driver airbag circuit), SRS control module fault or stored crash data.
• B1890 — B1890 — PAD Warning Lamp 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, damaged wiring in door jambs or wet areas, corroded or loose connectors.
• B1891 — Air Bag Tone Warning Indicator Circuit Short to Battery (B1891): 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, depleted backup battery or low system voltage, failed clockspring (driver airbag circuit).
• B1892 — Air Bag Tone Warning Indicator Circuit Failure (B1892): a body electrical fault affecting the airbag / restraint system (SRS). Short, gentle driving to a shop is usually possible. Most often caused by failed clockspring (driver airbag circuit), faulty impact or occupancy sensor, SRS control module fault or stored crash data.
• B1893 — GPS Antenna Open Circuit (B1893): 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, damaged wiring in door jambs or wet areas.
• B1894 — OBD2 code B1894 flags a problem with the body electrical system (wiper rear motor speed sense circuit failure). 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.
• B1895 — B1895 — B1895 — Driver's / Passenger's Door Ajar Output Circuit Failure: Causes, Symptoms & Fix. 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.