AutoCodes – Infiniti – P0103 2004 Infiniti G35

P0103 2004 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 2004 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 4,365

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 2004 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 2004 Infiniti G35 - Mass Air Flow Sensor Circuit High Input - AutoCodes.com — P0103 2004 Infiniti G35 Code - Mass Air Flow Sensor Circuit High Input

What does this mean?

What are the Possible Causes of the DTC P0103 2004 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 2004 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 2004 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 2004 Infiniti G35 Code

1. What are the common symptoms of OBDII code P0103 on a 2004 Infiniti G35?

The common symptoms of OBDII code P0103 (Mass Air Flow Sensor Circuit High Input) on a 2004 Infiniti G35 include poor engine performance, rough idling, stalling, and decreased fuel efficiency.

2. What could cause the Mass Air Flow Sensor Circuit High Input error code on a 2004 Infiniti G35?

The Mass Air Flow Sensor Circuit High Input error code (P0103) on a 2004 Infiniti G35 could be caused by a faulty mass air flow sensor, damaged wiring or connectors, or a problem with the engine control module.

3. How can I diagnose the Mass Air Flow Sensor Circuit High Input issue on my 2004 Infiniti G35?

To diagnose the Mass Air Flow Sensor Circuit High Input issue on a 2004 Infiniti G35, you can use an OBDII scanner to read the trouble code, visually inspect the wiring and connectors, and test the mass air flow sensor using a multimeter.

4. Can a dirty air filter trigger the P0103 code on a 2004 Infiniti G35?

Yes, a dirty air filter can disrupt the airflow readings to the mass air flow sensor and potentially trigger the P0103 code on a 2004 Infiniti G35. It is recommended to check and replace the air filter if necessary.

5. What are some repair tips for resolving the Mass Air Flow Sensor Circuit High Input code on a 2004 Infiniti G35?

Some repair tips for resolving the Mass Air Flow Sensor Circuit High Input code on a 2004 Infiniti G35 include cleaning or replacing the mass air flow sensor, checking and repairing any damaged wiring or connectors, and resetting the fault code after the repair.

6. Is it safe to continue driving my 2004 Infiniti G35 with the P0103 code present?

It is not recommended to continue driving your 2004 Infiniti G35 with the P0103 code (Mass Air Flow Sensor Circuit High Input) present, as it can lead to further engine performance issues and potential damage. It is advised to address the issue promptly.

7. Will resetting the OBDII code P0103 on my 2004 Infiniti G35 make it go away permanently?

Resetting the OBDII code P0103 on a 2004 Infiniti G35 may temporarily clear the code, but if the underlying issue causing the code is not resolved, the code is likely to reappear. It is important to diagnose and fix the root cause of the problem.

8. Can I clean the mass air flow sensor to fix the P0103 code on my 2004 Infiniti G35?

Cleaning the mass air flow sensor can sometimes help resolve the P0103 code on a 2004 Infiniti G35 if the sensor is dirty or contaminated. However, if the sensor is faulty, it may need to be replaced.

9. How much does it typically cost to repair the Mass Air Flow Sensor Circuit High Input issue on a 2004 Infiniti G35?

The cost of repairing the Mass Air Flow Sensor Circuit High Input issue on a 2004 Infiniti G35 can vary depending on the root cause of the problem. It could range from a simple cleaning or connector repair to a sensor replacement, with costs ranging from $50 to $300 or more.

10. Can a malfunctioning mass air flow sensor affect other systems in my 2004 Infiniti G35?

Yes, a malfunctioning mass air flow sensor in a 2004 Infiniti G35 can affect other systems such as fuel injection, ignition timing, and emission control systems, leading to poor performance and drivability issues. It is important to address the issue promptly to prevent further damage.