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

• P0707 — OBD2 code P0707 flags a problem with the automatic transmission control (transmission range sensor a circuit low input). Short, gentle driving to a shop is usually possible. Common culprits: faulty transmission speed sensor, wiring or connector faults in the valve body harness, low or degraded transmission fluid.
• P0708 — P0708 — Transmission Range Sensor A Circuit High Input. A fault in the automatic transmission control. Short, gentle driving to a shop is usually possible. Typical causes: low or degraded transmission fluid, valve body wear, internal mechanical wear (clutches, torque converter).
• P0709 — P0709 — Transmission Range Sensor A Circuit Intermittent. A fault in the automatic transmission control. Short, gentle driving to a shop is usually possible. Typical causes: failed shift or pressure control solenoid, internal mechanical wear (clutches, torque converter), valve body wear.
• P070A — P070A — Transmission Fluid Level Sensor Circuit. A fault in the automatic transmission control. Short, gentle driving to a shop is usually possible. Typical causes: failed shift or pressure control solenoid, low or degraded transmission fluid, valve body wear.
• P070B — Transmission Fluid Level Sensor Circuit Range/Performance (P070B): a powertrain (engine/transmission) fault affecting the automatic transmission control. Short, gentle driving to a shop is usually possible. Most often caused by failed shift or pressure control solenoid, faulty transmission speed sensor, wiring or connector faults in the valve body harness.
• P070C — P070C — Transmission Fluid Level Sensor Circuit Low. A fault in the automatic transmission control. Short, gentle driving to a shop is usually possible. Typical causes: faulty transmission speed sensor, valve body wear, low or degraded transmission fluid.
• P070D — OBD2 code P070D flags a problem with the automatic transmission control (transmission fluid level sensor circuit high). Short, gentle driving to a shop is usually possible. Common culprits: valve body wear, faulty transmission speed sensor, failed shift or pressure control solenoid.
• P070E — Transmission Fluid Level Sensor Circuit intermittent/Erratic (P070E): a powertrain (engine/transmission) fault affecting the automatic transmission control. Short, gentle driving to a shop is usually possible. Most often caused by faulty transmission speed sensor, valve body wear, low or degraded transmission fluid.
• P070F — OBD2 code P070F flags a problem with the automatic transmission control (transmission fluid level too low). Short, gentle driving to a shop is usually possible. Common culprits: wiring or connector faults in the valve body harness, failed shift or pressure control solenoid, faulty transmission speed sensor.
• P0710 — P0710 — Transmission Fluid Temperature Sensor A Circuit Malfunction. A fault in the automatic transmission control. Short, gentle driving to a shop is usually possible. Typical causes: wiring or connector faults in the valve body harness, failed shift or pressure control solenoid, low or degraded transmission fluid.
• P0711 — P0711 — Transmission Fluid Temperature Sensor A Circuit Range/Performance. A fault in the automatic transmission control. Short, gentle driving to a shop is usually possible. Typical causes: internal mechanical wear (clutches, torque converter), faulty transmission speed sensor, failed shift or pressure control solenoid.
• P0712 — Transmission Fluid Temperature Sensor A Circuit Low Input (P0712): a powertrain (engine/transmission) fault affecting the automatic transmission control. Short, gentle driving to a shop is usually possible. Most often caused by valve body wear, internal mechanical wear (clutches, torque converter), low or degraded transmission fluid.
• P0713 — Transmission Fluid Temperature Sensor A Circuit High Input (P0713): a powertrain (engine/transmission) fault affecting the automatic transmission control. Short, gentle driving to a shop is usually possible. Most often caused by internal mechanical wear (clutches, torque converter), wiring or connector faults in the valve body harness, valve body wear.
• P0714 — OBD2 code P0714 flags a problem with the automatic transmission control (transmission fluid temperature sensor a circuit intermittent). Short, gentle driving to a shop is usually possible. Common culprits: low or degraded transmission fluid, internal mechanical wear (clutches, torque converter), failed shift or pressure control solenoid.
• P0715 — OBD2 code P0715 flags a problem with the sensor and actuator circuits (input/turbine speed sensor a circuit malfunction). The car is usually drivable while you plan the repair. Common culprits: open or shorted wiring in the circuit, control module driver fault, blown fuse feeding the circuit.
• P0716 — Input/Turbine Speed Sensor A Circuit Range/Performance (P0716): a powertrain (engine/transmission) fault affecting the sensor and actuator circuits. The car is usually drivable while you plan the repair. Most often caused by poor ground connection, faulty sensor or actuator of the affected circuit, open or shorted wiring in the circuit.
• P0717 — OBD2 code P0717 flags a problem with the sensor and actuator circuits (input/turbine speed sensor a circuit no signal). The car is usually drivable while you plan the repair. Common culprits: open or shorted wiring in the circuit, control module driver fault, faulty sensor or actuator of the affected circuit.
• P0718 — OBD2 code P0718 flags a problem with the sensor and actuator circuits (input/turbine speed sensor a circuit intermittent). The car is usually drivable while you plan the repair. Common culprits: blown fuse feeding the circuit, corroded, loose or damaged connector, faulty sensor or actuator of the affected circuit.
• P0719 — OBD2 code P0719 flags a problem with the automatic transmission control (torque converter/brake switch b circuit low). Short, gentle driving to a shop is usually possible. Common culprits: wiring or connector faults in the valve body harness, faulty transmission speed sensor, low or degraded transmission fluid.
• P071A — Transmission Mode Switch "A" Circuit (P071A): a powertrain (engine/transmission) fault affecting the automatic transmission control. Short, gentle driving to a shop is usually possible. Most often caused by low or degraded transmission fluid, wiring or connector faults in the valve body harness, failed shift or pressure control solenoid.
• P071B — P071B — Transmission Mode Switch "A" Circuit Low. A fault in the automatic transmission control. Short, gentle driving to a shop is usually possible. Typical causes: wiring or connector faults in the valve body harness, low or degraded transmission fluid, failed shift or pressure control solenoid.
• P071C — P071C — Transmission Mode Switch "A" Circuit High. A fault in the automatic transmission control. Short, gentle driving to a shop is usually possible. Typical causes: internal mechanical wear (clutches, torque converter), wiring or connector faults in the valve body harness, valve body wear.
• P071D — Transmission Mode Switch "B" Circuit (P071D): a powertrain (engine/transmission) fault affecting the automatic transmission control. Short, gentle driving to a shop is usually possible. Most often caused by faulty transmission speed sensor, failed shift or pressure control solenoid, valve body wear.
• P071E — P071E — Transmission Mode Switch "B" Circuit Low. A fault in the automatic transmission control. Short, gentle driving to a shop is usually possible. Typical causes: failed shift or pressure control solenoid, valve body wear, wiring or connector faults in the valve body harness.