Engine-Codes.com
Engine-Codes – Nissan – P0112 2002 Nissan Sentra

P0112 2002 Nissan Sentra Code - Intake Air Temperature Circuit Low Input

Quick Answer

The P0112 diagnostic trouble code (DTC) for the 2002 Nissan Sentra refers to the Intake Air Temperature Circuit Low Input. Common causes include Faulty intake air temperature sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or contamination in the sensor connection. 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 2002 Nissan Sentra indicates Intake Air Temperature Circuit Low Input.
Common causes
Common causes include Faulty intake air temperature sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or contamination in the sensor connection.
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 10, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0112 2002 Nissan Sentra Description

The P0112 diagnostic trouble code (DTC) for the 2002 Nissan Sentra refers to the Intake Air Temperature Circuit Low Input. This code indicates that there is a problem with the intake air temperature sensor circuit, specifically that the voltage signal being sent to the Engine Control Module (ECM) is lower than expected. The intake air temperature sensor is a crucial component of the engine management system, as it provides the ECM with data on the temperature of the incoming air. This information is vital for the ECM to adjust the air-fuel mixture and ignition timing for optimal engine performance and efficiency.

OBDII Code P0112 2002 Nissan Sentra - Intake Air Temperature Circuit Low Input
P0112 2002 Nissan Sentra Code - Intake Air Temperature Circuit Low Input

Common Causes of P0112 2002 Nissan Sentra

  1. Faulty intake air temperature sensor
  2. Damaged wiring or connectors in the sensor circuit
  3. Corrosion or contamination in the sensor connection
  4. ECM malfunction
  5. Intake air temperature sensor circuit shorted to ground

Symptoms of P0112 2002 Nissan Sentra

  1. Poor fuel economy
  2. Reduced power output
  3. Rough idling
  4. Stalling or hesitation during acceleration
  5. Check Engine Light illuminated on the dashboard

How to Fix P0112 2002 Nissan Sentra

  1. Begin by visually inspecting the intake air temperature sensor and its wiring for any signs of damage or corrosion.
  2. Test the intake air temperature sensor using a multimeter to check for proper resistance values within the specified range.
  3. Check the wiring and connectors for continuity and repair or replace any damaged components as necessary.
  4. Clear the DTC using an OBD-II scanner and road test the vehicle to ensure the issue has been resolved.
  5. If the problem persists, consider replacing the intake air temperature sensor or consulting a professional mechanic for further diagnostics.

Cost to Fix P0112 2002 Nissan Sentra

The typical repair costs for addressing a P0112 code on a 2002 Nissan Sentra can range from $100 to $300, including parts and labor. However, it is important to note that the specific diagnosis time and labor rates at auto repair shops can vary depending on factors such as location, vehicle make and model, and engine type. Auto repair shops typically charge between $80 and $150 per hour for labor, with rates potentially higher at dealerships or in metropolitan areas, and lower at independent shops. To get a more accurate estimate, it is advisable to check local rates and consult with a professional mechanic.

When is the Code Detected?

An excessively low voltage from the sensor is sent to ECM.

Need more information about the P0112 2002 Nissan Sentra code?

Need more information on how to fix the P0112 2002 Nissan Sentra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0112 2002 Nissan Sentra code diagnosed by a professional: Find a repair shop in your area

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 2002 Nissan Sentra Code

1. What are the common symptoms of OBDII code P0112 in a 2002 Nissan Sentra?

- 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 2002 Nissan Sentra?

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

3. What are the possible causes of OBDII code P0112 in a 2002 Nissan Sentra?

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

4. How can I diagnose the cause of OBDII code P0112 in my 2002 Nissan Sentra?

- You can diagnose the issue by visually inspecting the sensor and its wiring, testing the sensor's resistance, and using a scan tool to monitor live data from the sensor.

5. Is it safe to continue driving my 2002 Nissan Sentra with OBDII code P0112 activated?

- It is not recommended to continue driving with this code active, as it can lead to poor engine performance and potentially cause further damage if left unresolved.

6. Can I repair OBDII code P0112 in my 2002 Nissan Sentra myself?

- Depending on your experience and tools available, you may be able to replace the intake air temperature sensor or repair the wiring yourself. If unsure, it's best to consult a professional mechanic.

7. How much does it typically cost to repair OBDII code P0112 in a 2002 Nissan Sentra at a mechanic?

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

8. Are there any temporary fixes or workarounds for OBDII code P0112 in a 2002 Nissan Sentra?

- There are no recommended temporary fixes for this code. It's best to address the root cause of the issue to ensure proper engine function.

9. Will resetting the OBDII code P0112 in my 2002 Nissan Sentra make it go away permanently?

- Resetting the code may temporarily turn off the check engine light, but if the underlying issue is not fixed, the code is likely to reappear.

10. How can I prevent OBDII code P0112 from reoccurring in my 2002 Nissan Sentra?

- To prevent the code from reoccurring, regularly inspect and maintain the intake air temperature sensor, wiring, and connectors, and address any issues promptly.

Discuss the causes and fixes for P0112 2002 Nissan Sentra OBDII Code

Submit a New Comment

Code P0112 2002 Nissan Sentra comments

No comments found for this page.