AutoCodes – Nissan – P0112 2003 Nissan Sentra

P0112 2003 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 2003 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 5,314

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 2003 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 2003 Nissan Sentra - Intake Air Temperature Circuit Low Input - AutoCodes.com — P0112 2003 Nissan Sentra Code - Intake Air Temperature Circuit Low Input

What does this mean?

What are the Possible Causes of the DTC P0112 2003 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 2003 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 2003 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 2003 Nissan Sentra code?

Need more information on how to fix the P0112 2003 Nissan Sentra code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 2003 Nissan Sentra Code

1. What are the common symptoms of OBDII code P0112 in a 2003 Nissan Sentra?

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

2. What does the OBDII code P0112 indicate in a 2003 Nissan Sentra?

- The code P0112 indicates a low input signal from the intake air temperature (IAT) sensor circuit in the vehicle.

3. What are the potential causes of the OBDII code P0112 in a 2003 Nissan Sentra?

- Possible 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 OBDII code P0112 in my 2003 Nissan Sentra?

- You can diagnose the code P0112 by checking the IAT sensor for proper operation, inspecting the wiring and connectors for damage, and using a scan tool to retrieve and analyze the code.

5. Can I drive my 2003 Nissan Sentra with the OBDII code P0112?

- It is not recommended to drive the vehicle with the code P0112 as it can lead to potential engine performance issues and further damage if left unresolved.

6. How can I repair the OBDII code P0112 in my 2003 Nissan Sentra?

- Repair options include replacing the faulty IAT sensor, repairing any damaged wiring or connectors, and resetting the ECM to clear the code.

7. Will resetting the ECM clear the OBDII code P0112 in my 2003 Nissan Sentra?

- Resetting the ECM may temporarily clear the code, but if the underlying issue is not fixed, the code is likely to reappear after driving the vehicle.

8. How much does it cost to fix the OBDII code P0112 in a 2003 Nissan Sentra?

- The cost of fixing the code P0112 can vary depending on the specific cause, but it may involve replacing the IAT sensor, repairing wiring, or seeking professional diagnostic services.

9. Can a DIY enthusiast fix the OBDII code P0112 in a 2003 Nissan Sentra?

- Yes, a DIY enthusiast with the necessary tools and knowledge can attempt to fix the code P0112 by following repair guides, consulting the vehicle's manual, and using diagnostic equipment.

10. How often does the OBDII code P0112 occur in a 2003 Nissan Sentra?

- The OBDII code P0112 can occur sporadically in a 2003 Nissan Sentra due to various factors, such as sensor wear, wiring issues, or ECM malfunctions.