CarSense › Trouble codes › P0113

P0113: Intake Air Temperature (IAT) Sensor Circuit High Input

What this check-engine code means in plain English, what usually causes it, and what a fix typically costs.

Severity: Monitor — not an emergency, but address soon

What P0113 means

The engine computer has detected an unusually high voltage signal from the intake air temperature sensor, which measures the temperature of air entering the engine. This typically indicates the sensor is reading extremely cold temperatures (often below -40°F) when that's not realistic, suggesting a circuit problem rather than actual air temperature.

What causes P0113?

Likely
Faulty IAT sensorThe sensor itself has failed internally, causing it to send an incorrect high-voltage signal to the computer.
Likely
Open or damaged wiringBroken wires, corroded connections, or damaged insulation in the IAT sensor circuit create an open circuit that reads as high voltage.
Possible
Loose or corroded connectorThe electrical connector at the IAT sensor has become loose, corroded, or contaminated with oil or moisture.
Less common
ECM issueThe engine control module itself has a fault in the IAT sensor input circuit, though this is rare.

Is P0113 safe to drive?

Drive it?
Usually yes, short-term
Watch for
Poor fuel economy, rough idle, or hesitation
DIY-friendly?
Moderate — sensor replacement is easy, but diagnosis requires a multimeter

You can typically continue driving with this code, as the computer will use a default air temperature value. However, you may experience reduced fuel economy, rough running when cold, or hesitation because the engine isn't adjusting properly for actual air temperature conditions.

P0113 repair cost

~$50 – $200+

Industry-average estimates. Cost depends on whether it's just the sensor (inexpensive) or requires wiring harness repair; the sensor itself is usually affordable and easy to access.

Which one is it for your car?

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