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Engine-Codes – Nissan – P0112 2008 Nissan Altima Sedan

P0112 2008 Nissan Altima Sedan Code - Intake Air Temperature Circuit Low Input

Quick Answer

The P0112 diagnostic trouble code (DTC) for a 2008 Nissan Altima Sedan indicates that there is a low input signal from the Intake Air Temperature (IAT) sensor circuit. Common causes include Faulty Intake Air Temperature (IAT) sensor, Damaged wiring or connectors in the IAT sensor circuit, Malfunctioning Engine Control Module (ECM). 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 Altima Sedan 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 sensor circuit, Malfunctioning Engine Control Module (ECM).
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 15, 2024
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Code P0112 2008 Nissan Altima Sedan Description

The P0112 diagnostic trouble code (DTC) for a 2008 Nissan Altima Sedan indicates that there is a low input signal from the Intake Air Temperature (IAT) sensor circuit. 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 receives a low input signal from the IAT sensor, it may not be able to accurately adjust the air-fuel mixture, leading to potential performance issues.

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

Common Causes of P0112 2008 Nissan Altima Sedan

  1. Faulty Intake Air Temperature (IAT) sensor
  2. Damaged wiring or connectors in the IAT sensor circuit
  3. Malfunctioning Engine Control Module (ECM)
  4. Air intake system leaks
  5. Incorrect sensor placement or mounting

Symptoms of P0112 2008 Nissan Altima Sedan

  1. Rough idling
  2. Poor fuel efficiency
  3. Hesitation during acceleration
  4. Engine stalling
  5. Reduced power output

How to Fix P0112 2008 Nissan Altima Sedan

  1. Begin by locating the IAT sensor in the air intake system.
  2. Inspect the sensor, wiring, and connectors for any visible damage or corrosion.
  3. Test the IAT sensor using a multimeter to check for proper resistance values.
  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 Altima Sedan

The typical repair costs for addressing a P0112 code on a 2008 Nissan Altima Sedan can range from $100 to $300, including parts and labor. However, it is important to note that 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. Auto repair shops commonly charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships, and lower at independent shops. It is recommended to check local rates for a more accurate estimate.

What does this mean?

Tech Notes for P0112 2008 Nissan Altima Sedan

Intake Air Temperature (IAT) sensor is built into the mass air flow sensor. Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replaced 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 Altima Sedan Code

1. What does OBDII code P0112 for a 2008 Nissan Altima Sedan mean?

Code P0112 indicates a low input in the Intake Air Temperature (IAT) sensor circuit.

2. What are the common symptoms of OBDII code P0112 in a 2008 Nissan Altima Sedan?

Common symptoms include poor fuel economy, rough idling, engine stalling, and possible issues with acceleration.

3. What are the possible causes of OBDII code P0112 in a 2008 Nissan Altima Sedan?

Potential causes include a faulty IAT sensor, damaged wiring or connectors in the sensor circuit, or issues with the engine control module (ECM).

4. How can I diagnose the Intake Air Temperature sensor in a 2008 Nissan Altima Sedan?

You can use a multimeter to test the resistance of the IAT sensor at different temperatures or consult a professional mechanic for a more accurate diagnosis.

5. Can a dirty air filter trigger OBDII code P0112 in a 2008 Nissan Altima Sedan?

A dirty air filter is unlikely to directly cause code P0112, but it can affect overall engine performance and should be checked and replaced if necessary.

6. Is it safe to continue driving my 2008 Nissan Altima Sedan with OBDII code P0112?

It is not recommended to drive with unresolved OBDII codes, as they can lead to further damage and potential safety hazards. It's best to address the issue promptly.

7. How can I reset OBDII code P0112 in my 2008 Nissan Altima Sedan?

After repairing the underlying issue causing the code, you can reset it using an OBDII scanner or by disconnecting the car battery for a few minutes.

8. Are there any DIY repair tips for fixing OBDII code P0112 in a 2008 Nissan Altima Sedan?

DIY repair tips include checking and cleaning the IAT sensor, inspecting wiring for damage, and ensuring proper connections in the sensor circuit.

9. Can a malfunctioning IAT sensor affect the performance of a 2008 Nissan Altima Sedan?

Yes, a malfunctioning IAT sensor can impact the air-fuel mixture, ignition timing, and overall engine performance in the vehicle.

10. How much does it typically cost to repair OBDII code P0112 in a 2008 Nissan Altima Sedan?

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

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