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Engine-Codes – Nissan – P0112 2005 Nissan Altima Sedan

P0112 2005 Nissan Altima Sedan Code - Intake Air Temperature Circuit Low Input

Quick Answer

The P0112 code on a 2005 Nissan Altima Sedan indicates a problem with the Intake Air Temperature (IAT) sensor circuit, specifically a low input signal. Common causes include Faulty IAT sensor, Damaged wiring or connectors in the IAT sensor circuit, Corrosion on the sensor terminals. 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 Nissan Altima Sedan indicates Intake Air Temperature Circuit Low Input.
Common causes
Common causes include Faulty IAT sensor, Damaged wiring or connectors in the IAT sensor circuit, Corrosion on the sensor terminals.
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 11, 2024
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Code P0112 2005 Nissan Altima Sedan Description

The P0112 code on a 2005 Nissan Altima Sedan indicates a problem with the Intake Air Temperature (IAT) sensor circuit, specifically a low input signal. The IAT sensor is responsible for measuring the temperature of the air entering the engine, which is crucial for the engine control unit (ECU) to accurately calculate the air-to-fuel ratio for combustion. When the ECU receives a low input signal from the IAT sensor, it may not be able to adjust the fuel mixture properly, leading to potential issues with engine performance, fuel efficiency, and emissions.

OBDII Code P0112 2005 Nissan Altima Sedan - Intake Air Temperature Circuit Low Input
P0112 2005 Nissan Altima Sedan Code - Intake Air Temperature Circuit Low Input

Common Causes of P0112 2005 Nissan Altima Sedan

  1. Faulty IAT sensor
  2. Damaged wiring or connectors in the IAT sensor circuit
  3. Corrosion on the sensor terminals
  4. Issues with the ECU

Symptoms of P0112 2005 Nissan Altima Sedan

  1. Rough idling
  2. Stalling
  3. Hesitation during acceleration
  4. Decreased fuel efficiency
  5. Engine misfires

How to Fix P0112 2005 Nissan Altima Sedan

  1. Begin by locating the IAT sensor, typically located near the air filter housing or intake manifold.
  2. Inspect the wiring and connectors for any visible damage or corrosion. Repair or replace as needed.
  3. Test the IAT sensor using a multimeter to check for proper resistance readings. Replace the sensor if it is faulty.
  4. Clear the diagnostic trouble codes from the ECU using an OBD-II scanner.
  5. Test drive the vehicle to ensure that the issue has been resolved and that the code does not reappear.

Cost to Fix P0112 2005 Nissan Altima Sedan

The cost of repairing a P0112 code on a 2005 Nissan Altima Sedan can vary depending on the specific cause of the issue. Typically, the cost of a new IAT sensor can range from $20 to $80, while the labor cost for diagnosis and repair can be around $100 to $200. Overall, the total repair cost may fall between $120 and $280. However, it is advisable to check with local auto repair shops for more accurate pricing based on your location and vehicle specifics. Labor rates can vary significantly, so it's essential to obtain multiple quotes before proceeding with the repair.

What does this mean?

Tech Notes for P0112 2005 Nissan Altima Sedan

Since the Intake Air Temperature (IAT) Sensor is par of the Mass Air Flow (MAF) Sensor, start by cleaning the MAF. If the problem persists the MAF may need to be replaced.

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 2005 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P0112 in a 2005 Nissan Altima Sedan?

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

2. What does the OBDII code P0112 "Intake Air Temperature Circuit Low Input" mean for a 2005 Nissan Altima Sedan?

- The code indicates that the intake air temperature sensor is reporting a lower than expected voltage to the engine control module.

3. What are the possible causes of OBDII code P0112 in a 2005 Nissan Altima Sedan?

- Possible causes include a faulty intake air temperature sensor, damaged wiring or connectors, a malfunctioning engine control module, or issues with the intake air temperature sensor circuit.

4. How can I diagnose the OBDII code P0112 in my 2005 Nissan Altima Sedan?

- You can diagnose the issue by checking the intake air temperature sensor for proper voltage, inspecting the sensor's wiring and connectors for damage, and using an OBDII scanner to reset the code and monitor sensor readings.

5. Can I drive my 2005 Nissan Altima Sedan with OBDII code P0112?

- It is not recommended to drive the vehicle with this code present as it can lead to poor engine performance and potential damage if left unresolved.

6. How can I repair OBDII code P0112 in my 2005 Nissan Altima Sedan?

- Repair options include replacing the intake air temperature sensor, repairing damaged wiring or connectors, or consulting a professional mechanic for further diagnosis and repair.

7. Is OBDII code P0112 a serious issue in a 2005 Nissan Altima Sedan?

- While the code may not cause immediate harm to the vehicle, it should be addressed promptly to prevent potential engine performance issues and further damage.

8. Can a DIY enthusiast fix OBDII code P0112 in a 2005 Nissan Altima Sedan?

- Depending on the skill level and tools available, a DIY enthusiast may be able to address the issue by replacing the intake air temperature sensor or repairing wiring, but professional assistance may be needed for more complex repairs.

9. Will resetting the OBDII code P0112 in my 2005 Nissan Altima Sedan make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to return after driving the vehicle for some time.

10. How much does it typically cost to repair OBDII code P0112 in a 2005 Nissan Altima Sedan?

- The cost of repair can vary depending on the specific cause of the issue, but it may range from around $100 to $300 for parts and labor.

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