P0113: Intake Air Temperature Sensor 1 Circuit High

P0113 means the intake air temperature (IAT) sensor is reporting an unusually high voltage, which the ECU interprets as extremely cold air temperatures that do not match actual conditions. This almost always points to a wiring fault, a failed sensor, or a disconnected electrical connector rather than a real temperature problem.

P0113 is a emissions-related diagnostic trouble code classified as low severity. When your vehicle's ECU detects this condition, it stores P0113 and illuminates the check engine light.

If your vehicle has triggered P0113, you may notice one or more of these symptoms:

• Check engine light on
• Slightly rough idle, especially on cold starts
• Marginally higher fuel consumption
• Possible hard starting in cold weather
• Minor hesitation on acceleration

Here are the most common causes of P0113, ranked by how likely they are to be the culprit:

Generally yes, for short-term driving. Generally safe to drive. The ECU will use a default air temperature value, which may slightly reduce fuel efficiency and performance. Repair at your convenience but do not ignore indefinitely.

Follow these steps to pinpoint the root cause of P0113:

1. Locate the IAT sensor - it is typically in the air intake tube between the air filter box and the throttle body, or integrated into the MAF sensor housing
2. Inspect the electrical connector for corrosion, bent pins, or disconnection. Clean with electrical contact cleaner and reseat the connector firmly
3. Read the IAT sensor value with a scan tool. With the engine cold, it should match the ambient temperature. A reading of -40 degrees C indicates an open circuit
4. Measure resistance across the IAT sensor terminals. At 20 degrees C, resistance is typically 2,000-3,000 ohms. An open circuit (infinite resistance) means the sensor is faulty
5. If the sensor tests fine, check wiring continuity between the sensor connector and the ECU. Repair any open or damaged wires

Repair costs for P0113 vary depending on the root cause and your vehicle. Here are typical estimates:

P0113 behaves differently depending on your vehicle. Select your car below for model-specific causes, known issues, and adjusted cost estimates:

These codes are often seen alongside P0113 or indicate related issues: