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

• P0069 — Manifold Absolute Pressure - Barometric Pressure Correlation (P0069): a powertrain (engine/transmission) fault affecting the throttle and intake air metering. Short, gentle driving to a shop is usually possible. Most often caused by dirty throttle body or stuck throttle plate, wiring or connector faults in the throttle circuit, faulty throttle position sensor or pedal sensor.
• P006A — OBD2 code P006A flags a problem with the throttle and intake air metering (MAP - mass or volume air flow correlation bank 1). Short, gentle driving to a shop is usually possible. Common culprits: contaminated or failed MAF/MAP sensor, failed electronic throttle motor, dirty throttle body or stuck throttle plate.
• P006B — MAP - Exhaust Pressure Correlation (P006B): a powertrain (engine/transmission) fault affecting the throttle and intake air metering. Short, gentle driving to a shop is usually possible. Most often caused by faulty throttle position sensor or pedal sensor, dirty throttle body or stuck throttle plate, intake air leaks after the MAF sensor.
• P006C — MAP - Turbocharger/Supercharger Inlet Pressure Correlation (P006C): a powertrain (engine/transmission) fault affecting the turbocharger / supercharger boost control. Short, gentle driving to a shop is usually possible. Most often caused by boost leak in intercooler piping or hoses, faulty boost pressure sensor, clogged intake or exhaust (DPF/cat).
• P006D — OBD2 code P006D flags a problem with the turbocharger / supercharger boost control (barometric pressure - turbocharger/supercharger inlet pressure correlation). Short, gentle driving to a shop is usually possible. Common culprits: stuck wastegate or faulty boost control solenoid, boost leak in intercooler piping or hoses, clogged intake or exhaust (DPF/cat).
• P006E — Turbocharger/Supercharger Boost Control "A" Supply Voltage Circuit Low (P006E): a powertrain (engine/transmission) fault affecting the turbocharger / supercharger boost control. Short, gentle driving to a shop is usually possible. Most often caused by worn turbocharger, clogged intake or exhaust (DPF/cat), stuck wastegate or faulty boost control solenoid.
• P006F — OBD2 code P006F flags a problem with the turbocharger / supercharger boost control (turbocharger/supercharger boost control "A" supply voltage circuit high). Short, gentle driving to a shop is usually possible. Common culprits: stuck wastegate or faulty boost control solenoid, vacuum or actuator line damage, faulty boost pressure sensor.
• P0070 — Ambient Air Temperature Sensor Circuit (P0070): 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 control module driver fault, poor ground connection, open or shorted wiring in the circuit.
• P0071 — P0071 — Ambient Air Temperature Sensor Range/Performance. 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.
• P0072 — P0072 — Ambient Air Temperature Sensor Circuit Low Input. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: control module driver fault, corroded, loose or damaged connector, open or shorted wiring in the circuit.
• P0073 — OBD2 code P0073 flags a problem with the sensor and actuator circuits (ambient air temperature sensor circuit high input). 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, poor ground connection.
• P0074 — OBD2 code P0074 flags a problem with the sensor and actuator circuits (ambient air temperature sensor circuit intermittent). 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, corroded, loose or damaged connector.
• P0075 — P0075 — Intake Valve Control Solenoid Circuit (Bank 1). A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: open or shorted wiring in the circuit, faulty sensor or actuator of the affected circuit, corroded, loose or damaged connector.
• P0076 — Intake Valve Control Solenoid Circuit Low (Bank 1) (P0076): 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 corroded, loose or damaged connector, blown fuse feeding the circuit, control module driver fault.
• P0077 — P0077 — Intake Valve Control Solenoid Circuit High (Bank 1). A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: open or shorted wiring in the circuit, corroded, loose or damaged connector, blown fuse feeding the circuit.
• P0078 — Exhaust Valve Control Solenoid Circuit (Bank 1) (P0078): 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, blown fuse feeding the circuit.
• P0079 — P0079 — Exhaust Valve Control Solenoid Circuit Low (Bank 1). A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: control module driver fault, faulty sensor or actuator of the affected circuit, corroded, loose or damaged connector.
• P007A — OBD2 code P007A flags a problem with the sensor and actuator circuits (charge air cooler temperature sensor circuit bank 1). The car is usually drivable while you plan the repair. Common culprits: poor ground connection, control module driver fault, blown fuse feeding the circuit.
• P007B — Charge Air Cooler Temperature Sensor Circuit Range/Performance Bank 1 (P007B): 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, corroded, loose or damaged connector, faulty sensor or actuator of the affected circuit.
• P007C — OBD2 code P007C flags a problem with the sensor and actuator circuits (charge air cooler temperature sensor circuit low bank 1). The car is usually drivable while you plan the repair. Common culprits: poor ground connection, control module driver fault, blown fuse feeding the circuit.
• P007D — P007D — Charge Air Cooler Temperature Sensor Circuit High Bank 1. 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, open or shorted wiring in the circuit.
• P007E — OBD2 code P007E flags a problem with the sensor and actuator circuits (charge air cooler temperature sensor circuit intermittent/erratic bank 1). The car is usually drivable while you plan the repair. Common culprits: blown fuse feeding the circuit, control module driver fault, faulty sensor or actuator of the affected circuit.
• P007F — Charge Air Cooler Temperature Sensor Bank1/Bank2 Correlation (P007F): 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 corroded, loose or damaged connector, open or shorted wiring in the circuit, blown fuse feeding the circuit.
• P0080 — Exhaust Valve Control Solenoid Circuit High (Bank 1) (P0080): 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 corroded, loose or damaged connector, poor ground connection, faulty sensor or actuator of the affected circuit.