What does this code mean?
A sensor measures the temperature of air entering the engine. P0113 indicates an excessively high electrical signal in its circuit. Despite the wording, a high signal does not mean the air is too hot.
Locate the reported problem
An open connection can produce an implausibly cold reading on many designs. The IAT may share a housing with another sensor.
Read it with the other codes
A temperature reading and an electrical voltage are different quantities. Check the cold-start reading and connector history together.
Possible causes to investigate
These are possibilities, not a diagnosis or a ranked list of failed parts.
- An intake connection, air leak or restriction affecting the measurement.
- A sensor, connector, power supply or signal-circuit problem.
What to do first
- Record whether the light appeared after an air-filter change or intake repair. Keep the complete code list.
- With the engine off and cool, look only for accessible disconnected intake fittings. Avoid touching sensing elements or spraying cleaners into them.
What the workshop can check
Ask the workshop to compare measured airflow, pressure or temperature with operating conditions and the correct wiring information. Electrical input faults and implausible readings call for different checks.
A useful question to ask
Does the cold-engine intake reading make sense, and is its connection intact?
Your vehicle changes the next step
Year, make, model, engine and the complete code list matter. Cylinder layout, test conditions and repair procedures can differ. Use service information for the exact vehicle; a generic code does not establish an exact failed part.
Can I keep driving?
This page cannot decide whether your car is safe to drive. A flashing engine light, severe shaking, overheating, strong fuel smell or major power loss calls for prompt attention. Stop safely when needed, follow your handbook and seek assistance rather than continuing a test drive.
Terms in this guide
These words appear in the explanation. Select an underlined term in the text to reach its definition.
- Sensor and signal
- A sensor measures something such as pressure or temperature. Its signal carries that information electrically to the car computer; a wrong reading does not always mean the measured component is faulty.
- Circuit, supply and ground
- A circuit includes the wiring and connections carrying electricity. Supply powers a component; ground is its electrical return. A fault in any of these can change a reading.
- Intake
- The passages and components that bring air into the engine. The intake manifold distributes that air among the cylinders.
- Sensor 1 and sensor 2
- In these guides, sensor 1 is before the catalytic converter and sensor 2 is after it. Sensor number is not cylinder number; confirm the physical location for the vehicle.
- IAT
- The intake-air temperature sensor. It may be built into another sensing component.
- Voltage
- The electrical difference that drives current, measured in volts. In a sensor code, high or low may describe this signal rather than the real temperature or pressure.
Sources and scope
Definitions and general OBD context are cross-checked against the references below. Manufacturer documents describe specific vehicles and systems; their procedures and thresholds are not instructions for every make. This is educational guidance, not a vehicle-specific repair procedure.