AutoCodes – Toyota – P0112 2005 Toyota Corolla

P0112 2005 Toyota Corolla Code - Intake Air Temperature Circuit Low Input 3ZZ-FE Engine

Quick Answer

The Intake Air Temperature (IAT) sensor is built into mass air flow sensor or in some vehicles mounted to the air filter duct housing. Common causes include Faulty Intake Air Temperature (IAT) sensor, Dirty air filter, Intake Air Temperature (IAT) sensor harness is open or shorted. 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 2005 Toyota Corolla indicates Intake Air Temperature Circuit Low Input 3ZZ-FE Engine.
Common causes: Common causes include Faulty Intake Air Temperature (IAT) sensor, Dirty air filter, Intake Air Temperature (IAT) sensor harness is open or shorted.
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.

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Code Popularity 4,219

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0112 2005 Toyota Corolla Description

The Intake Air Temperature (IAT) sensor is built into mass air flow sensor or in some vehicles mounted to the air filter duct housing. The sensor detects intake air temperature and transmits a signal to the Engine Control Module (ECM).The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. Electrical resistance of the thermistor decreases in response to the temperature rise. The Intake Air Temperature signal is used as an input for various systems in the vehicle.

OBDII Code P0112 2005 Toyota Corolla - Intake Air Temperature Circuit Low Input 3ZZ-FE Engine - AutoCodes.com — P0112 2005 Toyota Corolla Code - Intake Air Temperature Circuit Low Input 3ZZ-FE Engine

What does this mean?

What are the Possible Causes of the DTC P0112 2005 Toyota Corolla?

Faulty Intake Air Temperature (IAT) sensor
Dirty air filter
Intake Air Temperature (IAT) sensor harness is open or shorted
Intake Air Temperature (IAT) sensor circuit poor electrical connection

How to Fix the DTC P0112 2005 Toyota Corolla?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0112 2005 Toyota Corolla code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0112 2005 Toyota Corolla 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 2005 Toyota Corolla Code

1. What are the common symptoms of OBDII code P0112 on a 2005 Toyota Corolla (3ZZ-FE engine)?

The common symptoms of P0112 include poor fuel economy, rough idling, engine knocking, and a decrease in engine performance.

2. What does the OBDII code P0112 indicate on a 2005 Toyota Corolla with a 3ZZ-FE engine?

P0112 indicates that there is a low input signal from the Intake Air Temperature (IAT) sensor circuit.

3. What are the possible causes of the P0112 code on a 2005 Toyota Corolla?

Potential causes of the P0112 code can include a faulty IAT sensor, damaged sensor wiring, a disconnected sensor, or a problem with the engine control module.

4. How can I diagnose the P0112 code on my 2005 Toyota Corolla?

To diagnose the P0112 code, you can use a scan tool to check for the code, visually inspect the IAT sensor and its wiring, and test the sensor's resistance using a multimeter.

5. Can I drive my 2005 Toyota Corolla with the P0112 code?

It is not recommended to drive your vehicle with the P0112 code as it can lead to decreased performance and potential damage to the engine over time.

6. How do I repair the P0112 code on my 2005 Toyota Corolla?

To repair the P0112 code, you may need to replace the faulty IAT sensor, repair damaged wiring, or reset the engine control module after fixing the issue.

7. Are there any DIY tips for fixing the P0112 code on a 2005 Toyota Corolla?

DIY tips for fixing the P0112 code include checking and cleaning the sensor connector, ensuring the sensor is securely connected, and inspecting the sensor wiring for any visible damage.

8. Can a faulty IAT sensor cause other problems in my 2005 Toyota Corolla besides triggering the P0112 code?

Yes, a faulty IAT sensor can cause issues like incorrect fuel mixture, engine hesitation, and poor throttle response in addition to triggering the P0112 code.

9. How much does it typically cost to repair the P0112 code on a 2005 Toyota Corolla?

The cost of repairing the P0112 code on a 2005 Toyota Corolla can vary depending on the root cause of the issue, but it may range from $100 to $300 for parts and labor.

10. Is it necessary to clear the P0112 code after repairing the issue on a 2005 Toyota Corolla?

Yes, it is recommended to clear the P0112 code using a scan tool after repairing the issue to reset the Check Engine Light and ensure proper functioning of the vehicle's systems.