Engine-CodesNissan – P0112 Nissan

P0112 Nissan Code - Intake Air Temperature Circuit Low Input

Quick Answer

The P0112 code for Nissan vehicles indicates a problem with the Intake Air Temperature (IAT) sensor circuit, specifically a low input signal. Common causes include Faulty IAT sensor: The sensor itself may be malfunctioning and providing inaccurate temperature readings, Damaged sensor wiring harness: The wiring harness connecting the IAT sensor to the ECM may be damaged or frayed, Poor electrical connections: Corrosion or poor connections at the sensor or ECM can lead to a low input signal. 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 Nissan indicates Intake Air Temperature Circuit Low Input.
Common causes
Common causes include Faulty IAT sensor: The sensor itself may be malfunctioning and providing inaccurate temperature readings, Damaged sensor wiring harness: The wiring harness connecting the IAT sensor to the ECM may be damaged or frayed, Poor electrical connections: Corrosion or poor connections at the sensor or ECM can lead to a low input signal.
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.
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code P0112 Nissan Description

The P0112 code for Nissan vehicles indicates a problem with the Intake Air Temperature (IAT) sensor circuit, specifically a low input signal. The IAT sensor is responsible for monitoring the temperature of the air entering the engine. This information is crucial for the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion.

OBDII Code P0112 Nissan - Intake Air Temperature Circuit Low Input
P0112 Nissan Code - Intake Air Temperature Circuit Low Input

Common Causes of P0112 Nissan

  1. Faulty IAT sensor: The sensor itself may be malfunctioning and providing inaccurate temperature readings.
  2. Damaged sensor wiring harness: The wiring harness connecting the IAT sensor to the ECM may be damaged or frayed.
  3. Poor electrical connections: Corrosion or poor connections at the sensor or ECM can lead to a low input signal.
  4. ECM issues: Problems with the engine control module can also cause the P0112 code to appear.

Symptoms of P0112 Nissan

  1. Rough idling: The engine may idle roughly or stall due to incorrect air-fuel mixture adjustments.
  2. Reduced fuel efficiency: A faulty IAT sensor can lead to poor fuel economy as the engine may run rich or lean.
  3. Engine misfires: Incorrect air-fuel mixture can cause the engine to misfire, resulting in performance issues.
  4. Check Engine Light: The P0112 code will trigger the Check Engine Light on the dashboard to alert the driver of a problem.

How to Fix P0112 Nissan

  1. Diagnose the issue: Use a diagnostic scanner to retrieve the trouble code and perform testing on the IAT sensor and related components.
  2. Inspect wiring and connections: Check the wiring harness for any damage and ensure all electrical connections are secure.
  3. Replace the IAT sensor: If the sensor is faulty, replace it with a new one following manufacturer guidelines.
  4. Clear the code: After the repair, clear the trouble code with a diagnostic scanner to reset the Check Engine Light.
  5. Test drive: Take the vehicle for a test drive to ensure the issue has been resolved and the Check Engine Light does not reappear.

Cost to Fix P0112 Nissan

The typical repair costs for addressing a P0112 code on a Nissan vehicle can range from $100 to $300, including parts and labor. However, it is essential to note that actual costs can vary based on the specific diagnosis time and labor rates at auto repair shops. Factors such as the vehicle make and model, location, and engine type can also influence the final cost. It is recommended to obtain quotes from local auto repair shops to get a more accurate estimate.

When is the Code Detected?

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

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Information for Specific Nissan 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 Nissan Code

1. What are the common symptoms of OBDII code P0112 in a Nissan?

- Common symptoms include poor engine performance, decreased fuel efficiency, rough idling, and potential stalling.

2. What does the OBDII code P0112 in a Nissan indicate?

- The code P0112 indicates that the intake air temperature sensor circuit is detecting a low input signal.

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

- Possible causes include a faulty intake air temperature sensor, damaged wiring or connectors, or issues with the sensor's electrical circuit.

4. How can I diagnose the OBDII code P0112 in my Nissan?

- To diagnose the code P0112, you can use an OBDII scanner to read the code, inspect the intake air temperature sensor and its wiring for any visible damage, and test the sensor's resistance.

5. Can I continue to drive my Nissan with the OBDII code P0112?

- It is not recommended to drive your vehicle with the OBDII code P0112 present, as it can lead to further engine damage and potentially unsafe driving conditions.

6. How can I repair the OBDII code P0112 in my Nissan?

- Repairing the code P0112 typically involves replacing the faulty intake air temperature sensor, repairing any damaged wiring or connectors, and clearing the code with an OBDII scanner.

7. Is it possible to prevent the OBDII code P0112 from occurring in the future?

- Regular maintenance of your Nissan, including inspecting and cleaning the intake air temperature sensor, can help prevent the code P0112 from occurring.

8. Can a DIY enthusiast fix the OBDII code P0112 issue in a Nissan?

- Depending on your skill level and access to tools, a DIY enthusiast may be able to replace the intake air temperature sensor and address wiring issues associated with the code P0112.

9. How long does it typically take to repair the OBDII code P0112 in a Nissan?

- The repair time for the code P0112 can vary depending on the extent of the issue, but it generally takes around 1-2 hours to diagnose and fix the problem.

10. Will resetting the OBDII code P0112 resolve the issue in my Nissan?

- Resetting the code may temporarily clear the warning light, but if the underlying issue causing the code P0112 is not addressed, the problem is likely to reoccur.

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