AutoCodes – Nissan – P0112 20012 Nissan Sentra

P0112 20012 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 20012 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 7,821

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
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0112 20012 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 20012 Nissan Sentra - Intake Air Temperature Circuit Low Input - AutoCodes.com — P0112 20012 Nissan Sentra Code - Intake Air Temperature Circuit Low Input

What does this mean?

What are the Possible Causes of the DTC P0112 20012 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 20012 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 does this mean?

Code Tech Notes

Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compressed air or mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replace the mass air flow sensor.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0112 20012 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 20012 Nissan Sentra 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 20012 Nissan Sentra Code

1. What are the common symptoms of OBDII code P0112 in a 2012 Nissan Sentra?

- Common symptoms include poor engine performance, rough idling, reduced fuel efficiency, and an illuminated Check Engine light.

2. What does the OBDII code P0112 indicate in a 2012 Nissan Sentra?

- The code P0112 indicates that the Intake Air Temperature (IAT) sensor circuit is reporting a low input to the Engine Control Module (ECM).

3. What are the possible causes of the P0112 code in a 2012 Nissan Sentra?

- Possible causes include a faulty IAT sensor, damaged wiring or connectors in the IAT circuit, a disconnected or corroded sensor, or a malfunctioning ECM.

4. How can I diagnose the cause of the P0112 code in my 2012 Nissan Sentra?

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

5. Can I drive my 2012 Nissan Sentra with the P0112 code present?

- It is not recommended to drive your vehicle with the P0112 code present, as it can lead to poor engine performance and potentially cause further damage to your engine.

6. How can I repair the P0112 code in my 2012 Nissan Sentra?

- Repairing the P0112 code typically involves replacing a faulty IAT sensor, repairing damaged wiring or connectors, or resetting the ECM after addressing any underlying issues.

7. Will resetting the Check Engine light fix the P0112 code in my 2012 Nissan Sentra?

- Resetting the Check Engine light may temporarily clear the code, but it will not fix the underlying issue causing the P0112 code to appear.

8. Can a dirty air filter trigger the P0112 code in a 2012 Nissan Sentra?

- While a dirty air filter can affect engine performance, it is unlikely to trigger the P0112 code specifically. The code is usually related to the IAT sensor or its circuit.

9. How much does it cost to repair the P0112 code in a 2012 Nissan Sentra?

- The cost of repairing the P0112 code can vary depending on the cause of the issue and whether you choose to address it yourself or take it to a mechanic. Costs may include parts and labor.

10. Is the P0112 code a serious issue in a 2012 Nissan Sentra?

- While the P0112 code may not cause immediate harm to your vehicle, it is still important to address it promptly to prevent further damage and maintain optimal engine performance.