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Engine-Codes – Nissan – P0112 2008 Nissan Maxima

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

Quick Answer

The P0112 code for a 2008 Nissan Maxima indicates a problem with the Intake Air Temperature (IAT) sensor circuit registering a low input. Common causes include Faulty Intake Air Temperature (IAT) sensor, Damaged or disconnected wiring in the IAT circuit, Poor electrical connection at the sensor or ECU. 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 Maxima indicates Intake Air Temperature Circuit Low Input.
Common causes
Common causes include Faulty Intake Air Temperature (IAT) sensor, Damaged or disconnected wiring in the IAT circuit, Poor electrical connection at the sensor or ECU.
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 2008 Nissan Maxima Description

The P0112 code for a 2008 Nissan Maxima indicates a problem with the Intake Air Temperature (IAT) sensor circuit registering a low input. The IAT sensor is responsible for monitoring the temperature of the air entering the engine. This information is crucial for the engine control unit (ECU) to adjust the air-fuel mixture and ignition timing for optimal performance and efficiency. When the sensor reports a low input, it means that the temperature reading is lower than expected, which can lead to a variety of issues.

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

Common Causes of P0112 2008 Nissan Maxima

  1. Faulty Intake Air Temperature (IAT) sensor
  2. Damaged or disconnected wiring in the IAT circuit
  3. Poor electrical connection at the sensor or ECU
  4. Malfunctioning ECU
  5. Extreme temperature conditions affecting sensor readings

Symptoms of P0112 2008 Nissan Maxima

  1. Decreased fuel efficiency
  2. Rough idling or stalling
  3. Engine hesitation or lack of power
  4. Check Engine Light illuminated
  5. Poor overall engine performance

How to Fix P0112 2008 Nissan Maxima

  1. Begin by locating the IAT sensor in the intake air duct or manifold.
  2. Inspect the sensor and wiring for any visible damage or corrosion.
  3. Test the sensor using a multimeter to verify its resistance values.
  4. Check the wiring continuity from the sensor to the ECU.
  5. Replace the IAT sensor if it fails the resistance test or check for any wiring issues and repair as necessary.

Cost to Fix P0112 2008 Nissan Maxima

The cost of repairing a P0112 code on a 2008 Nissan Maxima can vary depending on the specific cause of the issue. On average, the cost of replacing an IAT sensor ranges from $50 to $150, while the labor costs can amount to $80 to $150 per hour. If the problem lies in the wiring or ECU, additional diagnostic and repair costs may apply. It is advisable to consult with a qualified mechanic or auto repair shop for an accurate cost estimate based on the specific circumstances of your vehicle.

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 Maxima Code

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

- Common symptoms include poor fuel economy, rough idling, lack of power, and potentially stalling of the vehicle.

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

- The P0112 code indicates that the Intake Air Temperature (IAT) sensor circuit is registering a low input, which can impact the engine's performance.

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

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

4. How can I diagnose the P0112 code on my 2008 Nissan Maxima?

- Diagnosis typically involves checking the IAT sensor for proper operation, inspecting the wiring and connectors for damage, and using a scan tool to gather data from the ECM.

5. Can a dirty air filter trigger the P0112 code on a 2008 Nissan Maxima?

- While a dirty air filter can affect engine performance, it is unlikely to directly cause the P0112 code. Focus on checking the IAT sensor and its circuit first.

6. What are some DIY repair tips for addressing the P0112 code on a 2008 Nissan Maxima?

- DIYers can start by checking the IAT sensor's wiring and connectors for any visible damage or corrosion before considering sensor replacement if necessary.

7. Is it safe to drive with the P0112 code illuminated on a 2008 Nissan Maxima?

- It is generally not recommended to drive with the P0112 code present, as it can impact the engine's performance and fuel efficiency. Prompt attention to the issue is advisable.

8. Can a disconnected IAT sensor cause the P0112 code on a 2008 Nissan Maxima?

- Yes, a disconnected or faulty IAT sensor can trigger the P0112 code due to the ECM receiving a low input signal from the sensor.

9. How much does it typically cost to repair the P0112 code on a 2008 Nissan Maxima?

- The cost of repairing the P0112 code can vary depending on the root cause. DIY repairs may cost less, while professional repairs at a dealership or mechanic shop could range from $100 to $300 or more.

10. Will resetting the OBDII code clear the P0112 code on a 2008 Nissan Maxima?

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

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