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

• P2710 — P2710 — Shift Solenoid F Intermittent. 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, faulty transmission speed sensor, low or degraded transmission fluid.
• P2711 — P2711 — Unexpected Mechanical Gear Disengagement. 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, open or shorted wiring in the circuit, faulty sensor or actuator of the affected circuit.
• P2712 — Hydraulic Power Unit Leakage (P2712): 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 blown fuse feeding the circuit, faulty sensor or actuator of the affected circuit, open or shorted wiring in the circuit.
• P2713 — OBD2 code P2713 flags a problem with the automatic transmission control (pressure control solenoid "D"). Short, gentle driving to a shop is usually possible. Common culprits: low or degraded transmission fluid, internal mechanical wear (clutches, torque converter), wiring or connector faults in the valve body harness.
• P2714 — OBD2 code P2714 flags a problem with the automatic transmission control (pressure control solenoid "D" performance/stuck off). Short, gentle driving to a shop is usually possible. Common culprits: internal mechanical wear (clutches, torque converter), low or degraded transmission fluid, valve body wear.
• P2715 — P2715 — Pressure Control Solenoid "D" Stuck On. A fault in the automatic transmission control. Short, gentle driving to a shop is usually possible. Typical causes: faulty transmission speed sensor, wiring or connector faults in the valve body harness, internal mechanical wear (clutches, torque converter).
• P2716 — OBD2 code P2716 flags a problem with the automatic transmission control (pressure control solenoid "D" electrical). Short, gentle driving to a shop is usually possible. Common culprits: faulty transmission speed sensor, low or degraded transmission fluid, failed shift or pressure control solenoid.
• P2717 — Pressure Control Solenoid "D" Intermittent (P2717): 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, faulty transmission speed sensor, low or degraded transmission fluid.
• P2718 — P2718 — Pressure Control Solenoid "D" Control Circuit/Open. 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).
• P2719 — Pressure Control Solenoid "D" Control Circuit Range/Performance (P2719): 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, low or degraded transmission fluid, faulty transmission speed sensor.
• P2720 — Pressure Control Solenoid "D" Control Circuit Low (P2720): 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.
• P2721 — OBD2 code P2721 flags a problem with the automatic transmission control (pressure control solenoid "D" control circuit high). Short, gentle driving to a shop is usually possible. Common culprits: faulty transmission speed sensor, low or degraded transmission fluid, failed shift or pressure control solenoid.
• P2722 — P2722 — Pressure Control Solenoid "E". A fault in the automatic transmission control. Short, gentle driving to a shop is usually possible. Typical causes: internal mechanical wear (clutches, torque converter), low or degraded transmission fluid, valve body wear.
• P2723 — OBD2 code P2723 flags a problem with the automatic transmission control (pressure control solenoid "E" performance/stuck off). Short, gentle driving to a shop is usually possible. Common culprits: internal mechanical wear (clutches, torque converter), valve body wear, failed shift or pressure control solenoid.
• P2724 — OBD2 code P2724 flags a problem with the automatic transmission control (pressure control solenoid "E" stuck on). Short, gentle driving to a shop is usually possible. Common culprits: low or degraded transmission fluid, failed shift or pressure control solenoid, faulty transmission speed sensor.
• P2725 — OBD2 code P2725 flags a problem with the automatic transmission control (pressure control solenoid "E" electrical). Short, gentle driving to a shop is usually possible. Common culprits: internal mechanical wear (clutches, torque converter), low or degraded transmission fluid, wiring or connector faults in the valve body harness.
• P2727 — Pressure Control Solenoid "E" Control Circuit/Open (P2727): 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), valve body wear, wiring or connector faults in the valve body harness.
• P2728 — P2728 — Pressure Control Solenoid "E" Control Circuit Range/Performance. 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, valve body wear, faulty transmission speed sensor.
• P2729 — OBD2 code P2729 flags a problem with the automatic transmission control (pressure control solenoid "E" control circuit low). Short, gentle driving to a shop is usually possible. Common culprits: internal mechanical wear (clutches, torque converter), wiring or connector faults in the valve body harness, failed shift or pressure control solenoid.
• P2730 — P2730 — Pressure Control Solenoid "E" Control Circuit High. 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.
• P2731 — P2731 — Pressure Control Solenoid "F". 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.
• P2732 — OBD2 code P2732 flags a problem with the automatic transmission control (pressure control solenoid "F" performance/stuck off). Short, gentle driving to a shop is usually possible. Common culprits: faulty transmission speed sensor, valve body wear, failed shift or pressure control solenoid.
• P2733 — OBD2 code P2733 flags a problem with the automatic transmission control (pressure control solenoid "F" stuck on). Short, gentle driving to a shop is usually possible. Common culprits: valve body wear, faulty transmission speed sensor, failed shift or pressure control solenoid.
• P2734 — Pressure Control Solenoid "F" Electrical (P2734): 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), low or degraded transmission fluid, wiring or connector faults in the valve body harness.