Intake Air Temperature Sensor Circuit High Input

The Intake Air Temperature (IAT) sensor plays a crucial role in modern automotive engines, measuring the temperature of the incoming air for the engine to adjust fuel delivery and ignition timing. 

The “Intake Air Temperature Sensor Circuit High Input” indicates a potential issue where the sensor reports a temperature higher than expected. 

This anomaly can trigger a range of complications in the engine’s performance, potentially affecting fuel efficiency, emissions, and overall driving experience. 

Resolving this problem requires a diagnostic approach to identify the root cause, whether it’s a faulty sensor, wiring issue, or other related factors. Understanding this error and its implications is fundamental for maintaining the optimal functionality of an automobile’s engine.

Common Causes of Intake Air Temperature Sensor Circuit High Input

The intake air temperature sensor plays a crucial role in engine performance by providing accurate temperature data to the ECU. However, several issues could lead to a high input circuit error, as indicated by the P0113 code.

Faulty IAT Sensor

A primary cause of the high input error is a faulty or damaged IAT sensor. When this sensor malfunctions, it can transmit incorrect temperature data to the ECU, triggering the P0113 code. 

Regular checks to ensure the sensor’s proper functionality and data accuracy are essential.

Faulty Wiring or Connector

Disrupted signal transmission from the IAT sensor to the ECU can stem from damaged wiring harnesses or faulty connectors. 

Thorough examination and repair of any damaged or disconnected wiring are imperative to rectify this issue.

Dirty or Contaminated IAT Sensor

Accumulation of dirt, debris, or engine oil on the IAT sensor can disrupt its functionality, leading to inaccurate temperature readings. Regular maintenance involving sensor cleaning can prevent such inaccuracies.

Intake Air Leaks

An often overlooked but significant issue contributing to the P0113 code is intake air leaks. Cracked or loose hoses causing abnormal airflow can impact the accuracy of the IAT sensor. 

Regular inspection and repairs of the intake system are crucial to maintain sensor precision.

Faulty ECU

Though rare, a malfunctioning ECU can also cause the P0113 code. If all other components are in proper working condition, an evaluation or replacement of the ECU by a qualified technician might be necessary.

Each of these factors can trigger the P0113 code, indicating a high input circuit error for the intake air temperature sensor. 

Addressing these potential causes systematically is essential to resolve the issue and ensure accurate readings and optimal engine performance.

Common Cars That Face Intake Air Temperature Sensor Circuit High Input

Audi

The “intake air temperature sensor circuit high input” in an Audi refers to a potential issue where the sensor detects a higher than normal reading for the intake air temperature. 

This anomaly could be caused by a faulty sensor, damaged wiring, or a connection issue, leading to inaccurate data being sent to the vehicle’s computer. 

BMW

In BMW vehicles, the intake air temperature sensor circuit high input refers to a potential issue where the sensor reports a higher than expected temperature reading.

This can lead to incorrect air-fuel mixture calculations, impacting engine performance and emissions.

Chevy

In Chevy vehicles, the intake air temperature (IAT) sensor circuit high input indicates a potential issue where the sensor reports an unusually high temperature reading to the engine control module (ECM). 

This can mislead the engine’s fuel-air mixture, impacting performance and fuel efficiency. 

Dodge

In Dodge vehicles, the intake air temperature sensor circuit high input signifies a potential issue in the sensor’s electrical circuit.

This problem often leads to inaccurate temperature readings, affecting the engine’s fuel-air mixture. 

Ford

In Ford vehicles, the intake air temperature sensor measures the temperature of incoming air for the engine. 

A “circuit high input” error indicates a potential issue, possibly caused by a faulty sensor or a problem within the wiring. 

GMC

In GMC vehicles, the intake air temperature sensor circuit’s high input indicates a potential issue where the sensor reports an excessively high temperature reading to the engine control module. 

This condition might be caused by sensor malfunctions, wiring problems, or even a faulty connection.

Honda

The intake air temperature sensor circuit high input in Honda vehicles typically indicates a potential issue with the sensor or its wiring.

This fault may lead to inaccurate temperature readings, affecting the engine’s fuel-air mixture. 

Jeep

The intake air temperature sensor in a Jeep measures the temperature of incoming air for the engine. 

If the sensor reports a high input in the circuit, it might imply a potential issue like a disconnected or faulty sensor, wiring problems, or sensor-related malfunctions. 

Kia

In Kia vehicles, an intake air temperature sensor circuit high input typically indicates a potential issue with the sensor or its associated wiring.

This fault often leads to inaccurate readings of the incoming air temperature, impacting the engine’s fuel-air mixture.

Lexus

The “Intake Air Temperature Sensor Circuit High Input” in a Lexus typically indicates a potential issue with the sensor or its circuitry.

This fault often leads to inaccurate temperature readings, affecting engine performance and fuel efficiency.

Mazda

In Mazda vehicles, an “intake air temperature sensor circuit high input” warning typically indicates an issue with the intake air temperature sensor or its associated wiring. 

This problem can result in the engine control module receiving unusually high readings from the sensor, potentially causing incorrect fuel mixture and performance issues.

Mercedes

The intake air temperature sensor in Mercedes vehicles monitors the temperature of incoming air for the engine. 

When the sensor circuit reports a “high input,” it typically indicates a potential issue with the sensor or its wiring, suggesting that the recorded temperature is unusually high. 

Mitsubishi

The intake air temperature sensor in a Mitsubishi measures the temperature of incoming air to the engine.

If the sensor circuit shows a “high input,” it typically indicates a potential issue, possibly a malfunction in the sensor or its wiring. 

Ram

The intake air temperature (IAT) sensor circuit’s high input in a Ram vehicle typically indicates a potential issue with the sensor or its wiring, signaling that the recorded temperature is unusually high.

This can lead to incorrect fuel delivery and potential performance issues. 

Subaru

In Subaru vehicles, an intake air temperature sensor circuit high input indicates a potential issue with the sensor or its wiring.

This fault can cause incorrect readings of the incoming air temperature, leading to poor engine performance or potential fuel efficiency problems. 

Toyota

The intake air temperature sensor circuit’s high input in Toyota vehicles typically signifies an abnormal reading from the sensor, suggesting that the intake air temperature is excessively high. 

This issue might cause the engine control module to inaccurately adjust air-fuel mixture ratios, potentially leading to poor engine performance, reduced fuel efficiency, or even triggering the check engine light. 

VW

The intake air temperature sensor in a VW measures the temperature of incoming air to the engine. If the sensor circuit shows a “high input,” it typically indicates a potential issue, possibly a malfunction in the sensor or its wiring. 

Volvo

In certain Volvo vehicles, the intake air temperature sensor circuit’s high input indicates a potential issue with the sensor system, registering a higher-than-normal input signal. 

This could result from wiring faults, sensor malfunctions, or issues within the sensor circuitry, impacting the engine’s air-fuel ratio and performance.

Conclusion

In conclusion, the “intake air temperature sensor circuit high input” issue indicates a potential problem with the sensor or its circuitry, leading to an inaccurate or excessively high reading of the intake air temperature. 

This condition could cause performance issues or incorrect air-fuel mixture, affecting engine efficiency. 

To resolve this issue, thorough inspection and potential replacement of the sensor or circuit components might be necessary, ensuring proper functionality and maintaining the optimal performance of the vehicle. 

Regular maintenance and timely addressing of such concerns are crucial for the smooth operation of the vehicle.

FAQs

What does ‘intake air temperature sensor circuit high input’ mean?

The error indicates that the intake air temperature sensor is detecting a higher-than-expected electrical input, often caused by a malfunction or a wiring issue in the sensor or its circuit.

What are the symptoms of a high input in the intake air temperature sensor circuit?

Common symptoms include poor engine performance, reduced fuel efficiency, and sometimes the illumination of the ‘Check Engine’ light on the dashboard due to the abnormal sensor readings.

What could cause a high input error in the intake air temperature sensor circuit?

Several factors might contribute to this issue, such as a faulty sensor, damaged wiring or connectors, or even issues with the engine control module.

How can I diagnose a high input error in the intake air temperature sensor circuit?

You can use an OBD-II scanner to read the error code. Additionally, checking the sensor and its wiring for any visible damage or corrosion may help pinpoint the issue.

Can I drive with a ‘high input’ error in the intake air temperature sensor circuit?

It’s generally not recommended to drive extensively with this issue as it could affect the engine’s performance and fuel efficiency. It’s advisable to have the problem diagnosed and repaired as soon as possible to prevent further complications.