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Engine-Codes – Nissan – P0112 2008 Nissan Sentra

P0112 2008 Nissan Sentra Code - Intake Air Temperature Circuit Low Input

Quick Answer

The P0112 diagnostic trouble code (DTC) for a 2008 Nissan Sentra refers to the Intake Air Temperature (IAT) sensor circuit having a low input. Common causes include Faulty IAT sensor, Damaged wiring or connectors in the IAT circuit, Corrosion or poor connections in the 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 2008 Nissan Sentra indicates Intake Air Temperature Circuit Low Input.
Common causes
Common causes include Faulty IAT sensor, Damaged wiring or connectors in the IAT circuit, Corrosion or poor connections in the 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 12, 2024
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Code P0112 2008 Nissan Sentra Description

The P0112 diagnostic trouble code (DTC) for a 2008 Nissan Sentra refers to the Intake Air Temperature (IAT) sensor circuit having a low input. The IAT sensor is responsible for measuring 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. When the ECM detects a low input from the IAT sensor, it may cause the engine to run rich, leading to decreased fuel efficiency, increased emissions, and potential engine performance issues.

OBDII Code P0112 2008 Nissan Sentra - Intake Air Temperature Circuit Low Input
P0112 2008 Nissan Sentra Code - Intake Air Temperature Circuit Low Input

Common Causes of P0112 2008 Nissan Sentra

  1. Faulty IAT sensor
  2. Damaged wiring or connectors in the IAT circuit
  3. Corrosion or poor connections in the sensor circuit
  4. ECM malfunction
  5. Intake air leaks affecting sensor readings

Symptoms of P0112 2008 Nissan Sentra

  1. Decreased fuel efficiency
  2. Rough idling or stalling
  3. Engine performance issues
  4. Check Engine Light illuminated
  5. Increased emissions

How to Fix P0112 2008 Nissan Sentra

  1. Begin by locating the IAT sensor in the intake air duct or manifold.
  2. Inspect the sensor, wiring, and connectors for any visible damage or corrosion.
  3. Test the IAT sensor using a multimeter to ensure it is within the specified resistance range.
  4. If the sensor is faulty, replace it with a new one and ensure proper installation.
  5. Clear the DTC with a scan tool and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P0112 2008 Nissan Sentra

The typical repair costs for addressing a P0112 code on a 2008 Nissan Sentra can range from $100 to $300, including parts and labor. However, specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It is advisable to check local rates for a more accurate estimate. Keep in mind that rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less.

What does this mean?

Tech Notes for P0112 2008 Nissan Sentra

Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compressed air or mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replace the mass air flow sensor.

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 2008 Nissan Sentra Code

1. What are the common symptoms of OBDII code P0112 on a 2008 Nissan Sentra?

The common symptoms of code P0112 on a 2008 Nissan Sentra include poor fuel efficiency, rough idle, and potentially stalling issues.

2. What does the OBDII code P0112 for a 2008 Nissan Sentra mean?

OBDII code P0112 for a 2008 Nissan Sentra refers to the Intake Air Temperature Circuit Low Input, indicating that the intake air temperature sensor is detecting a lower than normal temperature.

3. What are the possible causes of OBDII code P0112 on a 2008 Nissan Sentra?

Potential causes of code P0112 on a 2008 Nissan Sentra include a faulty intake air temperature sensor, damaged wiring or connectors, or issues with the engine control module (ECM).

4. How can I diagnose the Intake Air Temperature Circuit Low Input issue on my 2008 Nissan Sentra?

To diagnose the P0112 code on a 2008 Nissan Sentra, you can use a multimeter to test the intake air temperature sensor's resistance, check the wiring for any damage, and inspect the connectors for proper connection.

5. Can a dirty air filter cause OBDII code P0112 on a 2008 Nissan Sentra?

A dirty air filter is unlikely to directly cause code P0112 on a 2008 Nissan Sentra. However, a restricted air filter can affect the intake air temperature readings and indirectly contribute to sensor issues.

6. How serious is the Intake Air Temperature Circuit Low Input problem on a 2008 Nissan Sentra?

While code P0112 may not cause immediate drivability issues, it can lead to poor engine performance and fuel efficiency over time if left unresolved. It is recommended to address the problem promptly.

7. Can I drive my 2008 Nissan Sentra with OBDII code P0112?

It is not recommended to drive your 2008 Nissan Sentra with an active P0112 code, as it can impact the overall performance of the vehicle and potentially lead to other issues.

8. How much does it typically cost to repair OBDII code P0112 on a 2008 Nissan Sentra?

The cost of repairing code P0112 on a 2008 Nissan Sentra can vary depending on the root cause of the issue. It may range from $100 to $300 for parts and labor.

9. Is it possible to reset the OBDII code P0112 on a 2008 Nissan Sentra without fixing the underlying problem?

Resetting the code without addressing the underlying issue will only temporarily clear the check engine light. The problem will likely reoccur until the root cause is fixed.

10. Can a DIY enthusiast fix OBDII code P0112 on a 2008 Nissan Sentra?

DIY enthusiasts with automotive repair experience may be able to address code P0112 by replacing the intake air temperature sensor or checking the wiring. However, professional diagnosis and repair are recommended for accurate resolution.

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