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P0112 2004 Nissan Maxima Code - Intake Air Temperature Circuit Low Input

Quick Answer

The P0112 diagnostic trouble code (DTC) for a 2004 Nissan Maxima 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 or corroded wiring/connectors in the IAT sensor circuit, ECM software issue. 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 2004 Nissan Maxima indicates Intake Air Temperature Circuit Low Input.
Common causes
Common causes include Faulty intake air temperature (IAT) sensor, Damaged or corroded wiring/connectors in the IAT sensor circuit, ECM software issue.
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 13, 2024
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Code P0112 2004 Nissan Maxima Description

The P0112 diagnostic trouble code (DTC) for a 2004 Nissan Maxima 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, which is crucial for the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion. A low input signal suggests that the sensor is reading a temperature below the expected range, which can lead to various performance issues.

OBDII Code P0112 2004 Nissan Maxima - Intake Air Temperature Circuit Low Input
P0112 2004 Nissan Maxima Code - Intake Air Temperature Circuit Low Input

Common Causes of P0112 2004 Nissan Maxima

  1. Faulty intake air temperature (IAT) sensor
  2. Damaged or corroded wiring/connectors in the IAT sensor circuit
  3. ECM software issue
  4. Intake air leaks near the sensor
  5. Engine overheating affecting sensor readings

Symptoms of P0112 2004 Nissan Maxima

  1. Check Engine Light illuminated on the dashboard
  2. Decreased fuel efficiency
  3. Engine running rough or stalling
  4. Hesitation or lack of power during acceleration
  5. Increased emissions output

How to Fix P0112 2004 Nissan Maxima

  1. Begin by visually inspecting the wiring and connectors in the IAT sensor circuit for any damage or corrosion. Repair or replace as necessary.
  2. Test the IAT sensor using a multimeter to ensure it is functioning correctly. Replace the sensor if it is out of specification.
  3. Clear the DTC using an OBD-II scanner and monitor the sensor's readings to verify that the issue has been resolved.
  4. If the problem persists, perform a thorough diagnostic of the ECM to determine if it is causing the low input signal. Replace the ECM if necessary.
  5. After completing the repairs, test drive the vehicle to ensure that the symptoms associated with the P0112 code have been resolved.

Cost to Fix P0112 2004 Nissan Maxima

The typical repair costs for addressing a P0112 code on a 2004 Nissan Maxima can range from $100 to $300, depending on the specific cause of the issue and the cost of parts and labor in your area. It is important to note that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. Rates may be higher at dealerships or in metropolitan areas, while independent shops may offer lower prices. For a more accurate estimate, it is recommended to inquire with local auto repair shops.

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 2004 Nissan Maxima Code

1. What are the common symptoms of OBDII code P0112 on a 2004 Nissan Maxima?

- Common symptoms include poor fuel economy, rough idling, engine stalling, and a decrease in overall engine performance.

2. What can cause the Intake Air Temperature Circuit Low Input code (P0112) on a 2004 Nissan Maxima?

- The code P0112 can be triggered by a faulty intake air temperature sensor, damaged wiring or connectors, or a problem with the engine control module (ECM).

3. How can I diagnose the Intake Air Temperature Circuit Low Input code (P0112) on my 2004 Nissan Maxima?

- You can diagnose the issue by inspecting the intake air temperature sensor, checking the wiring for any damage, and using an OBDII scanner to read the code and data from the sensor.

4. Can a dirty air filter cause code P0112 on a 2004 Nissan Maxima?

- A dirty air filter itself is unlikely to cause the P0112 code, but it can affect the overall performance of the engine by restricting airflow, leading to related issues.

5. What are the repair options for resolving OBDII code P0112 on a 2004 Nissan Maxima?

- Repair options include replacing the intake air temperature sensor, repairing or replacing damaged wiring, or reprogramming the ECM if necessary.

6. Is it safe to continue driving my 2004 Nissan Maxima with OBDII code P0112?

- It is generally not recommended to continue driving with the P0112 code present, as it can lead to further engine problems and potential damage if left unresolved.

7. How much does it typically cost to repair OBDII code P0112 on a 2004 Nissan Maxima?

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

8. Can I reset the OBDII code P0112 on my 2004 Nissan Maxima without fixing the underlying issue?

- While you can clear the code with an OBDII scanner, it is not recommended to do so without addressing the root cause, as the problem will likely reoccur.

9. Will a P0112 code on a 2004 Nissan Maxima affect emissions testing?

- Yes, the P0112 code can cause your vehicle to fail emissions testing, as it indicates a problem with the intake air temperature sensor, which can affect emissions control.

10. How long does it typically take to repair OBDII code P0112 on a 2004 Nissan Maxima?

- The repair time for the P0112 code can vary depending on the exact cause of the issue and the availability of parts, but it may take anywhere from 1 to 3 hours to complete.

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