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P0112 Honda Code - Intake Air Temperature Sensor 1 Circuit Low Voltage

Quick Answer

The P0112 code for Honda vehicles indicates an issue with the Intake Air Temperature (IAT) Sensor 1 Circuit registering a low voltage. Common causes include Faulty Intake Air Temperature (IAT) Sensor, Wiring or connector issues in the IAT sensor circuit, Intake air leaks affecting sensor readings. 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 Honda indicates Intake Air Temperature Sensor 1 Circuit Low Voltage.
Common causes
Common causes include Faulty Intake Air Temperature (IAT) Sensor, Wiring or connector issues in the IAT sensor circuit, Intake air leaks affecting sensor readings.
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 08, 2024
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Code P0112 Honda Description

The P0112 code for Honda vehicles indicates an issue with the Intake Air Temperature (IAT) Sensor 1 Circuit registering a low voltage. The IAT sensor is responsible for measuring the temperature of the air entering the engine, providing vital information to the Engine Control Module (ECM) to adjust the air-fuel mixture for optimal combustion. A low voltage reading from the IAT sensor can lead to incorrect fuel trim adjustments, affecting engine performance, fuel efficiency, and emissions.

OBDII Code P0112 Honda - Intake Air Temperature Sensor 1 Circuit Low Voltage
P0112 Honda Code - Intake Air Temperature Sensor 1 Circuit Low Voltage

Common Causes of P0112 Honda

  1. Faulty Intake Air Temperature (IAT) Sensor.
  2. Wiring or connector issues in the IAT sensor circuit.
  3. Intake air leaks affecting sensor readings.
  4. ECM software or hardware issues.
  5. Extreme temperature conditions affecting sensor accuracy.

Symptoms of P0112 Honda

  1. Check Engine Light illuminated on the dashboard.
  2. Reduced engine performance or hesitation during acceleration.
  3. Poor fuel economy.
  4. Rough idling or stalling.
  5. Increased emissions output.

How to Fix P0112 Honda

  1. Begin by verifying the P0112 code with a diagnostic scan tool to confirm the issue.
  2. Inspect the IAT sensor and its wiring for any visible damage or corrosion. Replace the sensor if necessary.
  3. Check for any intake air leaks that could be affecting sensor readings.
  4. Clear the trouble codes and perform a test drive to monitor the sensor's performance.
  5. If the issue persists, further diagnostics may be needed to identify underlying ECM or wiring problems.

Cost to Fix P0112 Honda

The cost of repairing a P0112 code on a Honda vehicle can vary depending on the specific model and year. In general, replacing the Intake Air Temperature (IAT) Sensor can range from $50 to $150, while labor costs may add another $50 to $100. Additional diagnostic time and potential parts replacement for wiring issues or ECM faults can increase the total repair bill. It's recommended to consult with a trusted mechanic or dealership for an accurate cost estimate based on your vehicle's unique circumstances. Keep in mind that labor rates and parts prices can fluctuate based on location and service provider.

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Information for Specific Honda Models

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 Honda Code

1. What does the OBDII code P0112 for a Honda mean?

The code P0112 indicates that the Intake Air Temperature Sensor 1 Circuit is reporting a low voltage condition.

2. What are the common symptoms of a P0112 code on a Honda?

Common symptoms of a P0112 code include poor engine performance, decreased fuel efficiency, rough idling, and hesitation during acceleration.

3. What are the possible causes of a P0112 code in a Honda?

Possible causes of a P0112 code include a faulty intake air temperature sensor, damaged wiring or connectors in the sensor circuit, or issues with the engine control module (ECM).

4. How can I diagnose a P0112 code in my Honda?

Diagnosing a P0112 code typically involves using a multimeter to test the intake air temperature sensor's resistance, checking the sensor's wiring and connectors for damage, and verifying the ECM's functionality.

5. Can I continue driving my Honda with a P0112 code?

It is not recommended to drive your Honda with a P0112 code for an extended period, as it can lead to further engine problems and decreased fuel efficiency.

6. How can I repair a P0112 code in my Honda?

Repairing a P0112 code may involve replacing the intake air temperature sensor, repairing or replacing damaged wiring or connectors, or reprogramming the ECM.

7. Are there any DIY tips for fixing a P0112 code in a Honda?

DIY tips for fixing a P0112 code include checking the sensor's wiring for damage, ensuring proper sensor installation, and clearing the code with an OBDII scanner after making repairs.

8. Can a P0112 code be triggered by other underlying issues in a Honda?

Yes, a P0112 code can sometimes be triggered by other underlying issues such as a dirty air filter, vacuum leaks, or problems with the throttle body.

9. How long does it typically take to repair a P0112 code in a Honda?

The time it takes to repair a P0112 code in a Honda can vary depending on the exact cause of the issue and the extent of repairs needed, but it is usually a relatively quick fix.

10. Will resetting the ECM clear a P0112 code in a Honda?

Resetting the ECM may temporarily clear the P0112 code, but if the underlying issue causing the code is not addressed, it is likely to return.

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