AutoCodes – Infiniti – P0112 2003 Infiniti G35

P0112 2003 Infiniti G35 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 Infiniti G35 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 4,605

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 Infiniti G35 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 Infiniti G35 - Intake Air Temperature Circuit Low Input - AutoCodes.com — P0112 2003 Infiniti G35 Code - Intake Air Temperature Circuit Low Input

What does this mean?

What are the Possible Causes of the DTC P0112 2003 Infiniti G35?

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 Infiniti G35?

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 Infiniti G35 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.

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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 Infiniti G35 Code

1. What are the common symptoms of OBDII code P0112 on a 2003 Infiniti G35?

- Common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and potential stalling.

2. What does the P0112 code indicate on a 2003 Infiniti G35?

- The P0112 code signifies that the Intake Air Temperature (IAT) sensor circuit in the Infiniti G35 is reporting a low input voltage.

3. What are the possible causes of the P0112 code on a 2003 Infiniti G35?

- Potential causes of the P0112 code include a faulty IAT sensor, damaged wiring or connectors in the IAT circuit, or a problem with the engine control module (ECM).

4. How can I diagnose the P0112 code on my 2003 Infiniti G35?

- Diagnosis typically involves checking the IAT sensor for proper operation, inspecting the sensor wiring for damage, and testing the ECM for any faults related to the IAT circuit.

5. Can a dirty air filter trigger the P0112 code on a 2003 Infiniti G35?

- Yes, a dirty air filter can affect the IAT sensor readings, potentially leading to the P0112 code being triggered. It's a good idea to check and replace the air filter if needed.

6. Is it safe to continue driving with the P0112 code illuminated on a 2003 Infiniti G35?

- While the vehicle may still be operational with the P0112 code, it is not recommended to drive for an extended period as it can lead to further engine issues and decreased fuel efficiency.

7. Are there any simple repairs I can try to fix the P0112 code on my 2003 Infiniti G35?

- Basic repairs include checking and cleaning the IAT sensor, inspecting and repairing any damaged wiring, and ensuring all connections are secure and free of corrosion.

8. Will resetting the OBDII system clear the P0112 code on a 2003 Infiniti G35?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the P0112 code is not addressed, it is likely to reappear.

9. How much does it typically cost to repair the P0112 code on a 2003 Infiniti G35 at a mechanic or dealership?

- The cost of repairing the P0112 code can vary depending on the exact cause, but it may range from $100 to $300 for parts and labor.

10. Can a DIY enthusiast without advanced mechanical skills fix the P0112 code on a 2003 Infiniti G35?

- While some basic troubleshooting and repairs can be attempted by DIY enthusiasts, diagnosing and fixing complex issues related to the P0112 code may require professional assistance or specialized tools.