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.

P0A81 — P0A81 — Hybrid Battery Pack Cooling Fan 1 Control Circuit/Open. A fault in the engine cooling and temperature control. Short, gentle driving to a shop is usually possible. Typical causes: failed cooling fan or fan relay, thermostat stuck open or closed, water pump or radiator issues.
P0A82 — P0A82 — Hybrid Battery Pack Cooling Fan 1 Performance/Stuck Off. A fault in the engine cooling and temperature control. Short, gentle driving to a shop is usually possible. Typical causes: low coolant level or air in the system, failed cooling fan or fan relay, thermostat stuck open or closed.
P0A83 — Hybrid Battery Pack Cooling Fan 1 Stuck On (P0A83): a powertrain (engine/transmission) fault affecting the engine cooling and temperature control. Short, gentle driving to a shop is usually possible. Most often caused by failed cooling fan or fan relay, thermostat stuck open or closed, faulty coolant temperature sensor.
P0A84 — Hybrid Battery Pack Cooling Fan 1 Control Circuit Low (P0A84): a powertrain (engine/transmission) fault affecting the engine cooling and temperature control. Short, gentle driving to a shop is usually possible. Most often caused by low coolant level or air in the system, thermostat stuck open or closed, wiring faults in the sensor circuit.
P0A85 — P0A85 — Hybrid Battery Pack Cooling Fan 1 Control Circuit High. A fault in the engine cooling and temperature control. Short, gentle driving to a shop is usually possible. Typical causes: faulty coolant temperature sensor, low coolant level or air in the system, wiring faults in the sensor circuit.
P0A86 — P0A86 — 14 Volt Power Module Current Sensor Circuit. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: blown fuse feeding the circuit, open or shorted wiring in the circuit, control module driver fault.
P0A87 — 14 Volt Power Module Current Sensor Circuit Range/Performance (P0A87): 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, corroded, loose or damaged connector, control module driver fault.
P0A88 — OBD2 code P0A88 flags a problem with the sensor and actuator circuits (14 volt power module current sensor circuit low). The car is usually drivable while you plan the repair. Common culprits: control module driver fault, poor ground connection, open or shorted wiring in the circuit.
P0A89 — 14 Volt Power Module Current Sensor Circuit High (P0A89): 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, faulty sensor or actuator of the affected circuit, poor ground connection.
P0A8A — P0A8A — 14 Volt Power Module Current Sensor Circuit Intermittent. 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, poor ground connection, control module driver fault.
P0A8B — 14 Volt Power Module System Voltage (P0A8B): 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, open or shorted wiring in the circuit, faulty sensor or actuator of the affected circuit.
P0A8C — 14 Volt Power Module System Voltage Unstable (P0A8C): 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 open or shorted wiring in the circuit, control module driver fault, faulty sensor or actuator of the affected circuit.
P0A8D — 14 Volt Power Module System Voltage Low (P0A8D): 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 open or shorted wiring in the circuit, faulty sensor or actuator of the affected circuit, poor ground connection.
P0A8E — P0A8E — 14 Volt Power Module System Voltage High. 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, faulty sensor or actuator of the affected circuit.
P0A8F — P0A8F — 14 Volt Power Module System Performance. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: blown fuse feeding the circuit, corroded, loose or damaged connector, open or shorted wiring in the circuit.
P0A90 — Drive Motor "A" Performance (P0A90): 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 open or shorted wiring in the circuit, faulty sensor or actuator of the affected circuit, blown fuse feeding the circuit.
P0A91 — P0A91 — Drive Motor "B" Performance. 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, blown fuse feeding the circuit.
P0A92 — OBD2 code P0A92 flags a problem with the sensor and actuator circuits (hybrid generator performance). The car is usually drivable while you plan the repair. Common culprits: open or shorted wiring in the circuit, control module driver fault, corroded, loose or damaged connector.
P0A93 — OBD2 code P0A93 flags a problem with the sensor and actuator circuits (inverter "A" cooling system performance). 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, blown fuse feeding the circuit.
P0A94 — DC/DC Converter Performance (P0A94): 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, control module driver fault.
P0A95 — P0A95 — High Voltage Fuse. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: blown fuse feeding the circuit, open or shorted wiring in the circuit, corroded, loose or damaged connector.
P0A96 — OBD2 code P0A96 flags a problem with the engine cooling and temperature control (hybrid battery pack cooling fan 2 control circuit/open). Short, gentle driving to a shop is usually possible. Common culprits: thermostat stuck open or closed, wiring faults in the sensor circuit, faulty coolant temperature sensor.
P0A97 — P0A97 — Hybrid Battery Pack Cooling Fan 2 Performance/Stuck Off. A fault in the engine cooling and temperature control. Short, gentle driving to a shop is usually possible. Typical causes: faulty coolant temperature sensor, low coolant level or air in the system, water pump or radiator issues.
P0A98 — Hybrid Battery Pack Cooling Fan 2 Stuck On (P0A98): a powertrain (engine/transmission) fault affecting the engine cooling and temperature control. Short, gentle driving to a shop is usually possible. Most often caused by thermostat stuck open or closed, faulty coolant temperature sensor, failed cooling fan or fan relay.