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Engine-Codes – Toyota – P0112 2006 Toyota Prius

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

Quick Answer

The P0112 diagnostic trouble code (DTC) for a 2006 Toyota Prius refers to the Intake Air Temperature Circuit Low Input. Common causes include Faulty Intake Air Temperature (IAT) sensor, Damaged wiring or connectors in the IAT circuit, Corrosion or poor connections in the IAT sensor circuit. 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 Prius indicates Intake Air Temperature Circuit Low Input.
Common causes
Common causes include Faulty Intake Air Temperature (IAT) sensor, Damaged wiring or connectors in the IAT circuit, Corrosion or poor connections in the IAT sensor circuit.
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 13, 2024
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Code P0112 2006 Toyota Prius Description

The P0112 diagnostic trouble code (DTC) for a 2006 Toyota Prius refers to the Intake Air Temperature Circuit Low Input. This code indicates that the Engine Control Module (ECM) has detected a lower than expected voltage signal from the Intake Air Temperature (IAT) sensor circuit. The IAT sensor measures the temperature of the air entering the engine, which is crucial for determining the optimal air-fuel mixture for combustion. When the ECM receives a low input signal from the IAT sensor, it can lead to incorrect fuel delivery and ignition timing, resulting in poor engine performance and efficiency.

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

Common Causes of P0112 2006 Toyota Prius

  1. Faulty Intake Air Temperature (IAT) sensor
  2. Damaged wiring or connectors in the IAT circuit
  3. Corrosion or poor connections in the IAT sensor circuit
  4. Malfunctioning Engine Control Module (ECM)
  5. Intake air leaks affecting IAT sensor readings

Symptoms of P0112 2006 Toyota Prius

  1. Decreased fuel efficiency
  2. Rough idling or stalling
  3. Engine hesitation or lack of power
  4. Check Engine Light illuminated
  5. Increased emissions

How to Fix P0112 2006 Toyota Prius

  1. Begin by visually inspecting the wiring and connectors in the IAT sensor circuit for any damage or corrosion. Repair or replace any damaged components.
  2. Test the IAT sensor using a multimeter to ensure it is functioning correctly. Replace the sensor if it is faulty.
  3. Clear the DTC and reset the ECM by disconnecting the battery for a few minutes or using a scan tool.
  4. Start the vehicle and monitor the IAT sensor readings 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 ECM or other components.

Cost to Fix P0112 2006 Toyota Prius

The typical repair costs for addressing a P0112 code on a 2006 Toyota Prius can range from $100 to $300, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnostic time and labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. Rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more competitive pricing. For a more accurate estimate, it is recommended to consult with local auto repair shops.

What does this mean?

Tech Notes for P0112 2006 Toyota Prius

Intake air temperature sensor is built into the mass air flow meter. Before doing anything else clean the mass air flow meter with mass air flow sensor cleaner and reset the light.

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 2006 Toyota Prius Code

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

The common symptoms include poor fuel economy, rough idling, engine stalling, and a noticeable decrease in engine performance.

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

The code P0112 indicates a low input from the intake air temperature (IAT) sensor circuit in the 2006 Toyota Prius.

3. What are the possible causes of the intake air temperature circuit low input in a 2006 Toyota Prius?

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 issue related to OBDII code P0112 in my 2006 Toyota Prius?

You can start by checking the IAT sensor for proper operation, inspecting the wiring and connectors for damage, and scanning the ECM for any related error codes.

5. Can I drive my 2006 Toyota Prius with the intake air temperature circuit low input issue?

It is not recommended to drive your vehicle with this issue as it can lead to poor engine performance, decreased fuel efficiency, and potential engine damage.

6. How can I repair the intake air temperature circuit low input problem in my 2006 Toyota Prius?

The repair process may involve replacing the faulty IAT sensor, repairing or replacing damaged wiring or connectors, and clearing the error code with a diagnostic tool.

7. Is it possible to reset the OBDII code P0112 in a 2006 Toyota Prius without fixing the issue?

While you can clear the error code temporarily, it is crucial to address the underlying problem to prevent further issues and ensure proper vehicle operation.

8. Will fixing the intake air temperature circuit low input issue improve my 2006 Toyota Prius's fuel efficiency?

Yes, addressing this issue can help improve fuel efficiency by ensuring the engine receives accurate temperature readings for optimal performance.

9. How much does it typically cost to repair the intake air temperature circuit low input problem in a 2006 Toyota Prius?

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

10. Can a DIY enthusiast fix the intake air temperature circuit low input problem in a 2006 Toyota Prius?

If you have experience working on automotive electrical systems and access to the necessary tools, you may be able to diagnose and repair this issue yourself.

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