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.

C1525 — C1525 — Brake System Initialization Incomplete: Causes, Symptoms & Fix (C1525): a vehicle fault affecting the ABS / stability control. Short, gentle driving to a shop is usually possible. Most often caused by damaged tone (reluctor) ring on the hub, failed wheel speed sensor, damaged sensor wiring or corroded connector.
C1526 — C1526 — Brake Pedal Travel Sensor Fault: Causes, Symptoms & Fix (C1526): a vehicle fault affecting the ABS / stability control. Short, gentle driving to a shop is usually possible. Most often caused by failed wheel speed sensor, blown fuse or low voltage to the ABS module, damaged sensor wiring or corroded connector.
C1527 — C1527 — C1527 — Traction Control Rear Valve Circuit Excessive Temperature: Causes, Symptoms & Fix. A fault in the ABS / stability control. Short, gentle driving to a shop is usually possible. Typical causes: blown fuse or low voltage to the ABS module, damaged sensor wiring or corroded connector, damaged tone (reluctor) ring on the hub.
C1528 — OBD2 code C1528 flags a problem with the ABS / stability control (C1528 — traction control LF valve circuit excessive temperature: causes, symptoms & fix). Short, gentle driving to a shop is usually possible. Common culprits: failed wheel speed sensor, blown fuse or low voltage to the ABS module, faulty ABS module or pump motor.
C1529 — OBD2 code C1529 flags a problem with the turbocharger / supercharger boost control (C1529 — booster solenoid circuit excessive temperature: causes, symptoms & fix). Short, gentle driving to a shop is usually possible. Common culprits: clogged intake or exhaust (DPF/cat), vacuum or actuator line damage, boost leak in intercooler piping or hoses.
C1530 — C1530 — C1530 — Dynamic Stability Control RF Valve Circuit Excessive Temperature: Causes, Symptoms & Fix. A fault in the ABS / stability control. Short, gentle driving to a shop is usually possible. Typical causes: faulty ABS module or pump motor, damaged sensor wiring or corroded connector, blown fuse or low voltage to the ABS module.
C1531 — C1531 — C1531 — Dynamic Stability Control LF Valve Circuit Excessive Temperature: Causes, Symptoms & Fix. A fault in the ABS / stability control. Short, gentle driving to a shop is usually possible. Typical causes: failed wheel speed sensor, faulty ABS module or pump motor, blown fuse or low voltage to the ABS module.
C1600 — OBD2 code C1600 flags a problem with the ABS / stability control (C1600 — regenerative brake system fault: causes, symptoms & fix). Short, gentle driving to a shop is usually possible. Common culprits: faulty ABS module or pump motor, failed wheel speed sensor, blown fuse or low voltage to the ABS module.
C1699 — OBD2 code C1699 flags a problem with the sensor and actuator circuits (left rear sensor circuit short to vbat). The car is usually drivable while you plan the repair. Common culprits: faulty sensor or actuator of the affected circuit, open or shorted wiring in the circuit, corroded, loose or damaged connector.
C1700 — OBD2 code C1700 flags a problem with the sensor and actuator circuits (left rear sensor circuit failure). The car is usually drivable while you plan the repair. Common culprits: faulty sensor or actuator of the affected circuit, open or shorted wiring in the circuit, control module driver fault.
C1701 — Left Rear Sensor Circuit Fault (C1701): a chassis (brakes/steering/suspension) fault affecting the sensor and actuator circuits. The car is usually drivable while you plan the repair. Most often caused by control module driver fault, corroded, loose or damaged connector, open or shorted wiring in the circuit.
C1702 — C1702 — RightRear Sensor Circuit Short to Vbat. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: corroded, loose or damaged connector, control module driver fault, blown fuse feeding the circuit.
C1703 — OBD2 code C1703 flags a problem with the sensor and actuator circuits (right rear sensor circuit failure). The car is usually drivable while you plan the repair. Common culprits: blown fuse feeding the circuit, faulty sensor or actuator of the affected circuit, poor ground connection.
C1704 — Right Rear Sensor Circuit Fault (C1704): a chassis (brakes/steering/suspension) fault affecting the sensor and actuator circuits. The car is usually drivable while you plan the repair. Most often caused by control module driver fault, open or shorted wiring in the circuit, poor ground connection.
C1705 — Left Rear Center Sensor Circuit Short to Vbat (C1705): a chassis (brakes/steering/suspension) fault affecting the sensor and actuator circuits. The car is usually drivable while you plan the repair. Most often caused by corroded, loose or damaged connector, control module driver fault, faulty sensor or actuator of the affected circuit.
C1706 — C1706 — Left Rear Center Sensor Circuit Failure. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: faulty sensor or actuator of the affected circuit, poor ground connection, control module driver fault.
C1707 — Left Rear Center Sensor Circuit Fault (C1707): a chassis (brakes/steering/suspension) fault affecting the sensor and actuator circuits. The car is usually drivable while you plan the repair. Most often caused by blown fuse feeding the circuit, open or shorted wiring in the circuit, poor ground connection.
C1708 — Right Rear Center Sensor Circuit Short to Vbat (C1708): a chassis (brakes/steering/suspension) fault affecting the sensor and actuator circuits. The car is usually drivable while you plan the repair. Most often caused by blown fuse feeding the circuit, corroded, loose or damaged connector, control module driver fault.
C1709 — C1709 — Right Rear Center Sensor Circuit Failure. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: poor ground connection, blown fuse feeding the circuit, open or shorted wiring in the circuit.
C1710 — Right Rear Center Sensor Circuit Fault (C1710): a chassis (brakes/steering/suspension) fault affecting the sensor and actuator circuits. The car is usually drivable while you plan the repair. Most often caused by control module driver fault, blown fuse feeding the circuit, poor ground connection.
C1711 — OBD2 code C1711 flags a problem with the sensor and actuator circuits (left front sensor circuit short to vbat). The car is usually drivable while you plan the repair. Common culprits: poor ground connection, open or shorted wiring in the circuit, control module driver fault.
C1712 — OBD2 code C1712 flags a problem with the sensor and actuator circuits (left front sensor circuit failure). The car is usually drivable while you plan the repair. Common culprits: corroded, loose or damaged connector, blown fuse feeding the circuit, control module driver fault.
C1713 — OBD2 code C1713 flags a problem with the sensor and actuator circuits (left front sensor circuit fault). The car is usually drivable while you plan the repair. Common culprits: open or shorted wiring in the circuit, faulty sensor or actuator of the affected circuit, poor ground connection.
C1714 — Right Front Sensor Circuit Short to Vbat (C1714): a chassis (brakes/steering/suspension) fault affecting the sensor and actuator circuits. The car is usually drivable while you plan the repair. Most often caused by corroded, loose or damaged connector, blown fuse feeding the circuit, poor ground connection.