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Engine-Codes – Toyota – P0112 2006 Toyota Highlander

P0112 2006 Toyota Highlander Code - Intake Air Temperature Circuit Low Input

Quick Answer

The P0112 code for a 2006 Toyota Highlander indicates that there is a low input signal from the intake air temperature (IAT) sensor circuit. Common causes include Faulty IAT sensor, Damaged wiring or connectors in the sensor circuit, Malfunctioning PCM. 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 2006 Toyota Highlander indicates Intake Air Temperature Circuit Low Input.
Common causes
Common causes include Faulty IAT sensor, Damaged wiring or connectors in the sensor circuit, Malfunctioning PCM.
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 10, 2024
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Code P0112 2006 Toyota Highlander Description

The P0112 code for a 2006 Toyota Highlander indicates that there is a low input signal from the intake air temperature (IAT) sensor circuit. The IAT sensor is responsible for measuring the temperature of the air entering the engine, which is crucial for the proper fuel mixture and ignition timing. When the PCM (powertrain control module) detects a lower than expected voltage signal from the IAT sensor, it triggers the P0112 code.

OBDII Code P0112 2006 Toyota Highlander - Intake Air Temperature Circuit Low Input
P0112 2006 Toyota Highlander Code - Intake Air Temperature Circuit Low Input

Common Causes of P0112 2006 Toyota Highlander

  1. Faulty IAT sensor
  2. Damaged wiring or connectors in the sensor circuit
  3. Malfunctioning PCM
  4. Clogged air filter affecting sensor readings
  5. Environmental factors affecting sensor performance (e.g., extreme temperatures)

Symptoms of P0112 2006 Toyota Highlander

  1. Poor engine performance
  2. Reduced fuel efficiency
  3. Rough idling or stalling
  4. Check Engine Light illuminated
  5. Increased emissions

How to Fix P0112 2006 Toyota Highlander

  1. Begin by diagnosing the issue using a scan tool to retrieve the specific trouble code and identify the underlying cause.
  2. Inspect the IAT sensor, wiring, and connectors for any visible damage or corrosion. Replace any faulty components.
  3. Test the sensor's resistance and voltage output to ensure it is functioning within the manufacturer's specifications.
  4. Clear the trouble code from the PCM using the scan tool and perform a test drive to verify that the issue has been resolved.
  5. If the problem persists, further diagnostics may be necessary to identify any underlying issues with the PCM or other related components.

Cost to Fix P0112 2006 Toyota Highlander

The cost of repairing a P0112 code on a 2006 Toyota Highlander can vary depending on the specific cause of the issue. In general, replacing a faulty IAT sensor can cost between $50 to $150, while addressing wiring or connector issues may range from $100 to $200. If the PCM needs to be replaced, the cost can be significantly higher, potentially exceeding $500 or more. Labor costs can add an additional $80 to $150 per hour, depending on the shop's rates and location. It's recommended to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate based on the specific diagnosis and repair needed.

What does this mean?

Tech Notes for P0112 2006 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.

Need more information about the P0112 2006 Toyota Highlander code?

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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 2006 Toyota Highlander Code

1. What are the common symptoms of OBDII code P0112 in a 2006 Toyota Highlander?

- Common symptoms include poor engine performance, decreased fuel efficiency, and potential illumination of the Check Engine Light.

2. What does the OBDII code P0112 in a 2006 Toyota Highlander mean?

- This code indicates a low input signal from the intake air temperature (IAT) sensor circuit.

3. What are the possible causes of OBDII code P0112 in a 2006 Toyota Highlander?

- Possible causes 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 cause of OBDII code P0112 in my 2006 Toyota Highlander?

- You can diagnose the issue by checking the IAT sensor for proper operation, inspecting the wiring and connectors for damage, and using a scan tool to monitor the sensor readings.

5. Can a dirty air filter trigger OBDII code P0112 in a 2006 Toyota Highlander?

- Yes, a dirty air filter restricting airflow to the IAT sensor can cause incorrect temperature readings and trigger code P0112.

6. What are some repair tips for fixing OBDII code P0112 in a 2006 Toyota Highlander?

- Repair tips include cleaning or replacing the IAT sensor, repairing any damaged wiring or connectors, and ensuring proper airflow to the sensor.

7. Is it safe to continue driving with OBDII code P0112 in a 2006 Toyota Highlander?

- It is not recommended to drive with this code present, as it can lead to engine performance issues and potentially cause further damage if left unresolved.

8. Can I reset the Check Engine Light after fixing OBDII code P0112 in my 2006 Toyota Highlander?

- Yes, you can reset the Check Engine Light using an OBDII scanner after resolving the underlying issue triggering code P0112.

9. How much does it typically cost to repair OBDII code P0112 in a 2006 Toyota Highlander?

- The cost of repairs can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

10. Are there any recalls or technical service bulletins related to OBDII code P0112 in a 2006 Toyota Highlander?

- It's advisable to check with Toyota dealership or online resources to see if there are any recalls or technical service bulletins related to this specific OBDII code in the 2006 Highlander model.

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