AutoCodes – Nissan – P0112 2002 Nissan Sentra

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

Quick Answer

The Intake Air Temperature (IAT) sensor is built into mass air flow sensor or in some vehicles mounted to the air filter duct housing. Common causes include Faulty Intake Air Temperature (IAT) sensor, Dirty air filter, Intake Air Temperature (IAT) sensor harness is open or shorted. 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 (IAT) sensor, Dirty air filter, Intake Air Temperature (IAT) sensor harness is open or shorted.
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.

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Code Popularity 5,115

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0112 2002 Nissan Sentra Description

The Intake Air Temperature (IAT) sensor is built into mass air flow sensor or in some vehicles mounted to the air filter duct housing. The sensor detects intake air temperature and transmits a signal to the Engine Control Module (ECM).The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. Electrical resistance of the thermistor decreases in response to the temperature rise. The Intake Air Temperature signal is used as an input for various systems in the vehicle.

OBDII Code P0112 2002 Nissan Sentra - Intake Air Temperature Circuit Low Input - AutoCodes.com — P0112 2002 Nissan Sentra Code - Intake Air Temperature Circuit Low Input

What does this mean?

What are the Possible Causes of the DTC P0112 2002 Nissan Sentra?

Faulty Intake Air Temperature (IAT) sensor
Dirty air filter
Intake Air Temperature (IAT) sensor harness is open or shorted
Intake Air Temperature (IAT) sensor circuit poor electrical connection

How to Fix the DTC P0112 2002 Nissan Sentra?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0112 2002 Nissan Sentra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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

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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 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.