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P0112 2007 Toyota Highlander Code - Intake Air Temperature Circuit Low Input

Quick Answer

The P0112 diagnostic trouble code (DTC) for a 2007 Toyota Highlander indicates an issue with the Intake Air Temperature (IAT) sensor circuit registering a low input. Common causes include Faulty IAT sensor, Damaged or corroded wiring/connectors in the IAT sensor circuit, Intake air leaks. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0112 2007 Toyota Highlander indicates Intake Air Temperature Circuit Low Input.
Common causes
Common causes include Faulty IAT sensor, Damaged or corroded wiring/connectors in the IAT sensor circuit, Intake air leaks.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 15, 2024
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Code P0112 2007 Toyota Highlander Description

The P0112 diagnostic trouble code (DTC) for a 2007 Toyota Highlander indicates an issue with the Intake Air Temperature (IAT) sensor circuit registering a low input. The IAT sensor is responsible for monitoring the temperature of the air entering the engine. This data is crucial for the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion. When the ECM detects a low input from the IAT sensor, it may cause the engine to run rich, leading to decreased fuel efficiency, increased emissions, and potential drivability issues.

OBDII Code P0112 2007 Toyota Highlander - Intake Air Temperature Circuit Low Input
P0112 2007 Toyota Highlander Code - Intake Air Temperature Circuit Low Input

Common Causes of P0112 2007 Toyota Highlander

  1. Faulty IAT sensor
  2. Damaged or corroded wiring/connectors in the IAT sensor circuit
  3. Intake air leaks
  4. ECM software issues
  5. Engine overheating affecting IAT sensor readings

Symptoms of P0112 2007 Toyota Highlander

  1. Decreased fuel efficiency
  2. Rough idling or stalling
  3. Engine misfires
  4. Check Engine Light illuminated
  5. Reduced engine power

How to Fix P0112 2007 Toyota Highlander

  1. Begin by locating the IAT sensor in the intake air duct or manifold.
  2. Inspect the wiring and connectors for any damage, corrosion, or loose connections. Repair or replace as necessary.
  3. Test the IAT sensor using a multimeter to ensure it is functioning correctly. Replace if faulty.
  4. Clear the DTC using an OBD-II scanner and monitor the system for any reoccurrence of the code.
  5. If the code persists, further diagnosis may be required to check for any underlying issues such as intake air leaks or ECM malfunctions.

Cost to Fix P0112 2007 Toyota Highlander

The typical repair costs for addressing a P0112 code on a 2007 Toyota Highlander can range from $100 to $300, depending on the specific cause of the issue and the cost of parts and labor. This estimate includes the cost of a new IAT sensor, wiring repairs, and diagnostic time. It is important to note that labor rates at auto repair shops can vary, so it is advisable to check with local shops for a more accurate estimate based on your location and vehicle specifics.

What does this mean?

Tech Notes for P0112 2007 Toyota Highlander

Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replaced the mass air flow sensor.

When is the Code Detected?

An excessively low voltage from the sensor is sent to ECM.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0112 2007 Toyota Highlander Code

1. What are the common symptoms of OBDII code P0112 in a 2007 Toyota Highlander?

The common symptoms of code P0112 in a 2007 Toyota Highlander may include poor fuel economy, rough idling, engine stalling, and a lack of power.

2. What does the OBDII code P0112 on a 2007 Toyota Highlander indicate?

The OBDII code P0112 on a 2007 Toyota Highlander indicates an issue with the Intake Air Temperature (IAT) sensor circuit registering a low input.

3. What are the possible causes of OBDII code P0112 in a 2007 Toyota Highlander?

Possible causes of code P0112 in a 2007 Toyota Highlander include a faulty IAT sensor, damaged wiring or connectors in the IAT circuit, or a problem with the engine control module (ECM).

4. How can I diagnose the OBDII code P0112 on my 2007 Toyota Highlander?

To diagnose code P0112 on a 2007 Toyota Highlander, you can start by visually inspecting the IAT sensor and its wiring for any visible damage. Using a multimeter, you can test the sensor's resistance and voltage to determine if it is functioning correctly.

5. Can I drive my 2007 Toyota Highlander with OBDII code P0112?

It is not recommended to drive your 2007 Toyota Highlander with OBDII code P0112 as it can lead to poor engine performance and potential damage if left unresolved.

6. How can I repair OBDII code P0112 on a 2007 Toyota Highlander?

Repairing OBDII code P0112 on a 2007 Toyota Highlander typically involves replacing the faulty IAT sensor, repairing any damaged wiring or connectors, and clearing the code with an OBDII scanner.

7. Can a dirty air filter cause OBDII code P0112 in a 2007 Toyota Highlander?

While a dirty air filter can affect engine performance, it is not a direct cause of OBDII code P0112 in a 2007 Toyota Highlander. The code is specifically related to the Intake Air Temperature sensor circuit.

8. How important is it to address OBDII code P0112 in a 2007 Toyota Highlander promptly?

It is important to address OBDII code P0112 in a 2007 Toyota Highlander promptly to prevent potential engine damage, poor fuel efficiency, and drivability issues.

9. Will resetting the OBDII code P0112 in a 2007 Toyota Highlander fix the issue?

Resetting the OBDII code P0112 in a 2007 Toyota Highlander may temporarily clear the warning light, but if the underlying issue (such as a faulty IAT sensor) is not addressed, the code is likely to reappear.

10. Can a DIY enthusiast repair OBDII code P0112 in a 2007 Toyota Highlander?

A DIY enthusiast with the necessary tools and knowledge can potentially repair OBDII code P0112 in a 2007 Toyota Highlander by following proper diagnostic procedures and replacing the faulty components.

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