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P0112 2011 Nissan Altima Sedan Code - Intake Air Temperature Circuit Low Input

Quick Answer

The OBD-II trouble code P0112 for a 2011 Nissan Altima Sedan indicates a problem with the Intake Air Temperature (IAT) sensor circuit, specifically a low input voltage. Common causes include Faulty Intake Air Temperature (IAT) sensor, Damaged or corroded wiring/connectors in the IAT 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 2011 Nissan Altima Sedan 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 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 07, 2024
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Code P0112 2011 Nissan Altima Sedan Description

The OBD-II trouble code P0112 for a 2011 Nissan Altima Sedan indicates a problem with the Intake Air Temperature (IAT) sensor circuit, specifically a low input voltage. 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. A low input voltage from the IAT sensor can lead to incorrect fuel delivery, ignition timing, and overall engine performance.

OBDII Code P0112 2011 Nissan Altima Sedan - Intake Air Temperature Circuit Low Input
P0112 2011 Nissan Altima Sedan Code - Intake Air Temperature Circuit Low Input

Common Causes of P0112 2011 Nissan Altima Sedan

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

Symptoms of P0112 2011 Nissan Altima Sedan

  1. Check engine light illuminated
  2. Rough idling or engine stalling
  3. Reduced fuel efficiency
  4. Poor acceleration
  5. Increased emissions

How to Fix P0112 2011 Nissan Altima Sedan

  1. Begin by diagnosing the exact cause of the low input voltage from the IAT sensor using a diagnostic scanner to pinpoint the issue accurately.
  2. Inspect the sensor, wiring, and connectors for any visible damage or corrosion. Replace any damaged components as needed.
  3. Test the IAT sensor using a multimeter to ensure it is functioning correctly. Replace the sensor if it is found to be faulty.
  4. Clear the trouble code from the ECM memory using the diagnostic scanner and road test the vehicle to verify that the issue has been resolved.
  5. If the code persists, further diagnosis may be required to check for any underlying issues such as an ECM problem or intake air leaks.

Cost to Fix P0112 2011 Nissan Altima Sedan

The typical repair costs for addressing the P0112 code on a 2011 Nissan Altima Sedan may 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 essential to consult with a qualified mechanic or repair shop for a precise estimate, as rates can vary based on location, vehicle make and model, and the severity of the problem. Keep in mind that diagnosis time and labor rates at auto repair shops can fluctuate, with hourly rates typically falling between $80 and $150.

What does this mean?

Tech Notes for P0112 2011 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 2011 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P0112 on a 2011 Nissan Altima Sedan?

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

2. What does the OBDII code P0112 "Intake Air Temperature Circuit Low Input" mean for a 2011 Nissan Altima Sedan?

- This code indicates that the engine control module (ECM) has detected a low input signal from the intake air temperature (IAT) sensor.

3. What are the possible causes of OBDII code P0112 on a 2011 Nissan Altima Sedan?

- Possible causes include a faulty IAT sensor, damaged wiring or connectors in the IAT circuit, or issues with the ECM itself.

4. How can I diagnose the cause of OBDII code P0112 on my 2011 Nissan Altima Sedan?

- To diagnose the issue, you can use a multimeter to test the IAT sensor's resistance, check the wiring for any damage, and inspect the connectors for corrosion.

5. Can I drive my 2011 Nissan Altima Sedan with the OBDII code P0112 present?

- It is not recommended to drive your vehicle with this code present, as it can lead to further engine performance issues and potential damage.

6. How can I repair OBDII code P0112 on a 2011 Nissan Altima Sedan?

- Repairing this code typically involves replacing the faulty IAT sensor, repairing any damaged wiring or connectors, and clearing the code with an OBDII scanner.

7. Are there any DIY tips for fixing OBDII code P0112 on a 2011 Nissan Altima Sedan?

- While replacing the IAT sensor is relatively straightforward, diagnosing and repairing wiring issues may require more advanced skills and tools, so it's recommended to consult a professional mechanic.

8. Will resetting the OBDII code P0112 on my 2011 Nissan Altima Sedan make it go away permanently?

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

9. How much does it cost to fix OBDII code P0112 on a 2011 Nissan Altima Sedan at a repair shop?

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

10. Can a faulty IAT sensor causing OBDII code P0112 affect the overall performance of my 2011 Nissan Altima Sedan?

- Yes, a faulty IAT sensor can impact the air-fuel mixture, ignition timing, and other engine functions, leading to decreased performance and fuel efficiency.

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