AutoCodes – Infiniti – P0103 2005 Infiniti G35

P0103 2005 Infiniti G35 Code - Mass Air Flow Sensor Circuit High Input

Quick Answer

The Mass Air Flow (MAF) sensor is placed in the stream of the intake air. Common causes include Dirty Air Filter, Dirty Mass Air Flow (MAF) Sensor, Intake air leaks. 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: P0103 2005 Infiniti G35 indicates Mass Air Flow Sensor Circuit High Input.
Common causes: Common causes include Dirty Air Filter, Dirty Mass Air Flow (MAF) Sensor, Intake air leaks.
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 4,502

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 May 18, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0103 2005 Infiniti G35 Description

The Mass Air Flow (MAF) sensor is placed in the stream of the intake air. It measures the intake flow rate by measuring a part of the entire intake flow. It consists of a hot film that is supplied with electric current from the Engine Control Module (ECM). The ECM controls the temperature of the hot film by a certain amount. The heat generated by the hot film is reduced as the intake air flows around it. The more air, the greater the heat loss. Therefore, the ECM must supply more electric current to maintain the temperature of the hot film as air flow increases. The ECM detects the air flow by means of this current change. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the MAF Sensor Signal is more than the factory specifications.

OBDII Code P0103 2005 Infiniti G35 - Mass Air Flow Sensor Circuit High Input - AutoCodes.com — P0103 2005 Infiniti G35 Code - Mass Air Flow Sensor Circuit High Input

What does this mean?

What are the Possible Causes of the DTC P0103 2005 Infiniti G35?

Dirty Air Filter
Dirty Mass Air Flow (MAF) Sensor
Intake air leaks
Faulty Mass Air Flow Sensor
Mass Air Flow Sensor harness is open or shorted
Mass Air Flow Sensor circuit poor electrical connection

How to Fix the DTC P0103 2005 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 does this mean?

Code Tech Notes

Before replacing the Mass Air Flow (MAF) Sensor, try replacing the air filter and cleaning the Mass Air Flow Sensor with low compress air or Mass Air Flow Sensor Cleaner. Reset code and drive vehicle. If the code comes back, you must replace the Mass Air Flow Sensor to fix the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0103 2005 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 P0103 2005 Infiniti G35 Code

1. What are the common symptoms of OBDII code P0103 on a 2005 Infiniti G35?

- Common symptoms include rough idling, engine stalling, poor acceleration, and a decrease in fuel efficiency.

2. What does the OBDII code P0103 indicate on a 2005 Infiniti G35?

- The code P0103 indicates a high input signal from the Mass Air Flow (MAF) sensor circuit.

3. What are the possible causes of OBDII code P0103 on a 2005 Infiniti G35?

- Possible causes include a faulty MAF sensor, damaged wiring or connectors in the MAF circuit, a dirty or clogged MAF sensor, or a vacuum leak.

4. How can I diagnose the OBDII code P0103 on my 2005 Infiniti G35?

- You can diagnose the code by visually inspecting the MAF sensor and its connections, testing the sensor's voltage, checking for any vacuum leaks, and using a scan tool to monitor MAF sensor data.

5. Can I drive my 2005 Infiniti G35 with the OBDII code P0103?

- It is not recommended to drive the vehicle with the code P0103 as it can lead to poor engine performance and potential damage if left unresolved.

6. How do I repair OBDII code P0103 on a 2005 Infiniti G35?

- Repair options include cleaning or replacing the MAF sensor, repairing damaged wiring or connectors, fixing any vacuum leaks, and clearing the trouble code with a scan tool.

7. Is it possible to reset the OBDII code P0103 on a 2005 Infiniti G35 without fixing the issue?

- While you can clear the code with a scan tool, it is crucial to address the underlying problem causing the high input signal to prevent further issues.

8. Can a dirty air filter cause OBDII code P0103 on a 2005 Infiniti G35?

- A dirty air filter can indirectly affect the MAF sensor's readings, potentially leading to a high input signal and triggering the P0103 code.

9. How much does it cost to repair OBDII code P0103 on a 2005 Infiniti G35?

- The cost of repairs can vary depending on the exact cause of the issue, but it may range from $100 to $500, including parts and labor.

10. How often should the MAF sensor be inspected on a 2005 Infiniti G35 to prevent OBDII code P0103?

- It is recommended to inspect the MAF sensor during regular maintenance intervals or whenever you notice any symptoms of MAF sensor issues to prevent the occurrence of code P0103.